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Overview of DDR2/667 memory modules

Tikhon Baranov

This article is not intended for those readers who, when purchasing, are not concerned about the final price of the “machine” that they are purchasing or upgrading. It is for those “advanced” users (as well as those interested in upgrading a PC without major expenses) who know how and from what to assemble a good and cheap computer.

So, here is a review of DDR2/667 memory modules from various manufacturers. It's no secret that DDR2 has firmly and, apparently, become a leader in the memory module standard for the PC platform for a long time, which cannot be expected soon from new technology DDR3, since the majority of modern economy-class motherboards ("mainstream") have 240-pin DDR2 DIMM slots.

Assessing this standard as more technologically advanced and very promising, AMD switched to it, trying to keep up with its competitor Intel. As a result, all AMD platforms based on Socket AM2 only support DDR2.

And in the future, memory and chipset developers are going to show the world new standard DDR2 - at a frequency of 1066 MHz, releasing a line of certified products.

There is only one "but". Of course, for the most part, modern platforms, both from Intel and from the aforementioned AMD, support DDR2/800 memory (which delivers a frequency of 400 MHz on the memory bus), but only prices for memory modules certified to operate at this frequency , bite, which is why owners of "mainstream" class PCs (middle and budget classes) prefer DDR2/667.

Officially, DDR2/667 is designed to operate at 333 MHz, but since it is made using the same technology as DDR2/800, you can save a little by making these memory modules operate at 400 MHz (and at higher frequencies), with a small increasing delays or supply voltage.

To do this, you just need to, firstly, choose the memory manufacturer wisely, and secondly, configure it in BIOS Setup timings and voltages and try to overclock the memory to make sure that it is capable of operating at the specified frequency. Fortunately, the vast majority of motherboards, both expensive and quite affordable, provide this opportunity.

We decided to do tests on DDR2/667 memory modules (from various manufacturers), common in our region, belonging to the class of mass-produced inexpensive memory (which is available in retail at low prices), to find out at what frequencies and at what latencies these will work stably memory modules.

Testing was carried out on the AMD platform, precisely because it is most accessible to the owner of a mid-price PC. The modules were tested in pairs in two-channel dual mode.

Testing took place in the following modes:
1. Command Rate = 1T, voltage 1.8 V (nominal for DDR2 memory);
2. Command Rate = 1T, voltage 2.1 V (relatively safe voltage for memory without heatsinks);
3. Command Rate = 2T, voltage 1.8 V;
4. Command Rate = 2T, voltage 2.1 V.

The Command Rate 1T mode for Socket AM2 platforms is one of the most significant for performance, but often on many motherboards, when combining the board with memory, this mode does not work. This is a heavy mode; in addition, the ASUS board, as it turned out, sets the default timings quite sharply, so many memory modules refuse to work on it.

For the reasons listed above, the 2T mode also passed the test.

Highest clock frequency measured for three sets of timings: 3-3-3-9, 4-4-4-12, 5-5-5-15, in accordance with SPD profiles.

So, moving directly to the characteristics of specific memory modules, we note that these modules were chosen because their advantage is noticeable: they have a much more affordable (compared to DDR2/800) price, and therefore they can be safely equipped with any, even the most inexpensive PC. At the same time, the tested modules are “brands,” although the names of their manufacturers are unlikely to mean anything to the average user.

GOODRAM

The Polish company Wilk Elektronik is quite popular in our region, as its products have an affordable price combined with good quality.

Characteristics of the 512 MB GOODRAM DDR2/667 memory module:
- one-sided;
- single-rank;
- equipped with eight standard microcircuits with a capacity of 512 Mbit (64Mx8, 4 banks) in FBGA packages;
- the memory does not have standard radiators;
- the original manufacturer of the chips is unknown (the chips are marked “GOODRAM”);
- y printed circuit board no features.

The SPD modules contain standard timings for frequencies of 200, 266, and 300 MHz.

At the last frequency, operation is guaranteed at a timing of 5-5-5-15; on the company website there are no recommendations for choosing the supply voltage, and there is no mention of the required Command Rate value.

The GOODRAM memory module is supplied in a standard plastic box (Retail version) without instructions, warranty cards and other accompanying materials.

The average price of one memory module is 600 rubles.

Thus, GOODRAM products can easily be included in the list of the most affordable ones (among well-known brands).

Samsung

Samsung modules are chosen by those users who trust the quality of a well-known brand and are willing to pay accordingly for it (the average cost is about 750 rubles for 512 Mb).

Samsung produces ready-made memory modules with its own chips, supplying them to OEMs and system integrators. However, memory modules with the Samsung logo can be found in retail sales not difficult (OEM products appear there periodically).

Specifications:
- an unusual printed circuit board with many signal lines distributed along the top layer. This is due to the fact that such a board is also used for double-sided modules, but in our case the memory sticks are single-sided;
- 64Mx8 in standard size FBGA packages;
- cooling is not provided;
- the Samsung SPD module block contains standard timing information for DDR2-667 memory for frequencies of 200, 266 and 333 MHz. The maximum frequency is available with delays of 5-5-5-15;
- without complete set and packaging materials.

Kingston

Kingston is a very well-known company among manufacturers RAM. It produces both expensive server memory and SO-DIMM memory for laptop computers.

Its most affordable line for system integrators is Value RAM.

Characteristic:
- one-sided;
- 64Mx8 in standard size FBGA packages. The Kingston logo, engraved on the chip body, hides the true manufacturer from us; it was not possible to immediately find it by marking;
- the Kinston SPD module block contains all the same information about timings for frequencies of 200, 266 and 333 MHz, the memory will work on any boards with DDR2 support. 333 MHz frequency is guaranteed for timings 5-5-5-15;
- packaging - Retail, with installation instructions and warranty information. There is also a counterfeit-proof logo.

Reliable and high quality brand belonging to the top price category, although sticks from this manufacturer with a capacity of 512 Mb can be found in retail at a low price - 713 rubles.

Aeneon

A little history. This trademark owned by Qimonda, one of the leaders in the RAM market. Qimonda was previously part of the Infineon concern, and after the reorganization of the business, as a separate subsidiary, it began to develop, produce and sell memory chips, including products based on them.

The Qimonda company, which offers in the Aeneon DDR, DDR2 line of standard series a special overlocker memory of the "Xtune" series, operating at a frequency of 1066 MHz at a nominal voltage of 1.8 V.

Specifications:
- one-sided;
- single-rank;
- 64Mx8 in standard size FBGA packages. The memory chips bear the Aeneon markings, which do not match the original Qimonda markings, so we cannot reliably indicate the source of origin of these chips;
- the SPD of the Aeneon module has standard profiles for three operating frequencies - 200, 266 and 333 MHz. The sticker states that the memory operates at the nominal frequency with timings of 5-5-5-15;
- it is only clear that Aeneon was involved in packaging and testing independently. Cooling using a radiator for chips is not provided.

CEON

This brand is new to our market, although the manufacturer of memory modules CEON Novax Technologies is quite reputable, since it is a subsidiary of the leading Taiwanese manufacturer Powerchip (PSC).

The CEON memory range includes standard DDR and DDR2 modules, SO-DIMM modules for portable PCs and flash cards.

Novax, like Samsung, supplies memory modules for OEM orders from the world's leading brands.

Specifications:
- one-sided;
- single-rank;
- 64Mx8 in standard size FBGA packages. The chips are marked "CEON", which means Novax participated in their production (wafer cutting, testing, packaging);
- CEON is written to the SPD of the module standard information about timings for the three main frequencies. Operation at a frequency of 667 (333) MHz is ensured with delays of 5-5-5-15 and a voltage of 1.8 V.

Test results

1. Samsung memory was most effective on timings 5-5-5-15. For example, it was able to achieve a frequency of 758 (379) MHz at nominal voltage and Command Rate 1T, which is much better than the results of Kingston and GOODRAM. However, it was noticeable that Samsung practically did not respond to an increase in voltage, as well as to an increase in Command Rate.

2. GOODRAM memory did not want to work at Command Rate 1T on the ASUS board; it barely reached 600 MHz, despite increasing the timings. Although, at Command Rate 2T it shows high results, and at the rated voltage it is in the lead.

3. Kinston memory looked pretty smooth. It works stably at Command Rate 1T, reaching a frequency of 700 (350) MHz already at “four”. It responds effectively to a rise in voltage, however, at nominal value, alas, its results are not always high.

4. Aeneon memory. Despite the low price, the memory from this manufacturer showed very good results at the rated voltage. With Command Rate 2T, it is quite capable of operating at frequencies above 800 MHz, and reaches the 667 MHz bar at 4-4-4-12. However, Aeneon does not approve of increasing the voltage; this option is not the best for overclocking.

5. Novax memory demonstrated quite predictable results at rated voltage; Stable operation at 667 MHz is possible with Command Rates of both 2T and 1T. CEON tolerates increases in voltage well, the results improve significantly, and in this mode this memory can compete with Kingston. In particular, CEON takes the frequency of 800 MHz already at 4-4-4-12, and on the “fives” it works at 900 MHz.

At the nominal voltage, the results of Aeneon and CEON were not too high; neither of them exceeded the 700 MHz bar. At delays of 3-3-3-9, the Aeneon module performed well, at 4-4-4-12, Kingston excelled (we previously noted the confident performance of this memory on “fours”), CEON has good performance at 5-5-5- 15. Increasing the voltage improved Aeneon's results very slightly, while Kingston only helped with "threes". But CEON voltage only benefited: frequencies increased for all timings, and at “five” the “ceiling” of 770 MHz was reached, a record for our series of tests.

However, despite all the serious approach to the testing process and its results, we should not forget that at the same time, not only small manufacturers, but many well-known brands periodically change even their proven suppliers of crystals, and therefore, purchasing, even from a reliable store, memory module does not guarantee that you will purchase exactly the one that is written about, tested and compared by any, even authoritative, sources. Buying such a memory module is to some extent a lottery: you certainly won’t buy a defective product, but by testing it, you can get completely different results.

In mid-2005, prices for DDR and DDR2 RAM were almost equal. The reason for this is the company's active promotion Intel platforms LGA775, with the latest generation of chipsets (i955X, i945P and i945G) focused exclusively on DDR2. In addition, starting with the i925XE chipset, the performance of systems with DDR2 memory is almost as fast as a system based on i875P and DDR1 memory. As for processors with a 266 MHz bus, only the use of DDR2 memory allows them to fully realize their potential.

As for operating frequencies, the completely unpopular DDR2-400 modules have already disappeared from sale, and DDR2-667 modules have become more and more common. Therefore, today we will look at how much faster the new modules are than the popular and most common DDR2-533 modules. And as test samples we use modules manufactured by Kingmax.

These modules have a capacity of 1GB. The first feature is the installed ASIC (Application Specific Integrated Circuit) decoding chip (it is red in the photo). The second feature is that the memory chips themselves have markings indicating their manufacturer - the Elpida company.

The Wcpu utility produces the following SPD information:

You can notice that, in general, the standard timings of Kingmax memory are quite high, but correspond to the technical parameters of competitors.

At the same time, maternal MSI board The 945P Neo on the i945P chipset (which was used for tests) set the following operating timings:

for frequency 533 MHz

for frequency 667 MHz

Let us immediately draw your attention to the fact that on the test board at a frequency of 533 MHz, the Kingmax DDR2-667 memory worked extremely unstable, even when the Vmem voltage was increased and manually set to higher timings. At the same time, operation at a frequency of 667 MHz did not raise any complaints. We also found some compatibility problems with boards manufactured by Asus (based on i955X and nForce4 IE chipsets). But with the Foxconn 955X7AA board, the Kingmax memory worked just perfectly. Both at the frequency of 533 MHz and at 667 MHz the stability of operation was 100 percent. Moreover, when overclocked with the maximum memory frequency multiplier, Kingmax DDR2-667 modules started working at a frequency of 850 MHz, which indicates considerable potential for overclocking.

Therefore, we tested the performance of DDR2 memory with a frequency of 533 MHz with noname modules on Samsung chips. The fact is that we recently tested DDR2-533 memory modules, also manufactured by Kingmax. These modules showed excellent results on motherboards with i915P and i925X(E) chipsets. But on the latest boards based on the i955X and i945P chipsets, these modules behaved very strangely: they refused to work at the standard frequency of 133(533) MHz; and the only stable frequency was 100 (400) MHz.

To complete the picture, we present the operating timings of DDR2 memory at frequencies of 533 MHz

So, let's start testing. The following components were used at the stand:

Test equipment
CPU	Intel Pentium4 LGA775 660 (3.6GHz; Prescott-2M)
Cooler	Zalman 7000Cu
Video card	Abit Radeon X600XT
Sound card	-
HDD	IBM DTLA 307030 30Gb
Motherboard	MSI 945P Neo on Intel chipset 945P
Frame	Inwin506 with PowerMan 300W power supply
OS	Windows XP SP1

Performance:

Kbsec. more is better

The conclusion can be formulated as follows: DDR2-667 memory does provide a slight increase in performance. But for processors with a 200 MHz bus it is insignificant, and can be completely offset by the use of DDR2-533 modules with more aggressive timings. However, memory manufacturers are constantly improving the characteristics of their products. And therefore, we can expect a reduction in timings for both DDR2-533 and DDR2-667 memory modules.

It is also necessary to note that for gaming system The memory operating frequency does not play any role. The fact is that starting with a resolution of 1024x768, the main load falls on the video card, and in order to notice any difference in speed, the user must have a high-end card latest generation. On weaker video cards there will be no difference in speed between DDR2-400 and DDR2-667.

As for the performance of a system with DDR2-667 memory and a processor on a 266 MHz bus, the performance gain here should be much greater. And as soon as we have the opportunity, we will definitely test this mode of operation.

Now a few words about the Kingmax DDR2-667 modules themselves. In general, apart from some incompatibility with the MSI 945P Neo board and the Asus P5WD2-Premium board (which is probably due to BIOS flaws), there are no complaints about these modules. And it can be fully recommended for purchase. But, in any case, it is better to first agree on the conditions for replacement or moneyback (however, the problem with the compatibility of memory modules with motherboards occurs in all manufacturers). Moreover, with the release of new BIOS versions, the situation is constantly changing.

Separately, we highlight the very high potential for overclocking Kingmax DDR2-667 modules. In particular, with the Foxconn 955X7AA board we achieved a stable operating frequency = 850 MHz at timings 5-4-11-4. Again, with other boards the results can be either higher or lower. Moreover, the exit new version The BIOS for the 955X7AA board can also either improve or worsen overclocking results.

The DDR2 standard has firmly established itself as the dominant memory standard for the PC platform. The vast majority of motherboards produced today, including budget ones, are equipped with 240-pin DDR2 DIMM slots. Following Intel, AMD also switched to this more technologically advanced and promising standard; its Socket AM2 platform supports only DDR2. The new DDR3 technology will not soon become a real competitor to its predecessor, especially in the niche of inexpensive and mass-produced computers. In addition, DDR2 still has room for growth: leading memory and chipset developers plan to take the new barrier - the 1066 MHz frequency, approve it as a standard and release lines of certified products.

Most modern platforms, both Intel and AMD, support DDR2-800 memory, that is, they allow you to set the memory bus frequency to 400 MHz. However, memory modules certified to operate at this frequency are still quite expensive. Owners of mid-range and budget-class computers usually focus on DDR2-667 memory. In fact, it is made using the same technologies, but is officially designed only for a frequency of 333 MHz. However, with a slight increase in delays or supply voltage, such modules can operate at 400 MHz and at higher frequencies without problems. To save a little, you just need to carefully select the memory manufacturer, configure timings and voltages in BIOS Setup, and test the memory for overclocking to make sure it is fully functional at the specified frequency. Most motherboards, even inexpensive ones, provide such capabilities.

In our review, we will look at three pairs of inexpensive 512 MB DDR2-667 memory modules.

Produced water tel	Name	Marking	Memory chips	Ob- I eat	Hour- tota	Tai- min- gi	Nap- mummer- tion	Price for 512 MB *
Wilk Elektronik	-	GR667D264L5/512	GOODRAM	512 MB	667 MHz	5-5-5-15	n/a	$21-29
Samsung	-	M378T6553EZS	Samsung	512 MB	667 MHz	5-5-5-15	1.8 V	$24-38
Kingston	ValueRAM	KVR667D2N5/512	Kingston	512 MB	667 MHz	5-5-5-15	1.8 V	$26-45
* - prices are indicated for Minsk at the time of preparation of the material

All of them are widespread in our region, belong to the class of mass-produced inexpensive memory, and are sold at retail at affordable prices. We want to find out at what frequencies and at what delays these memory modules will operate stably.

GOODRAM

We will consider memory modules in ascending order of price. Let's start with the products of the Polish company Wilk Elektonik, which has recently become very popular in our region thanks to affordable prices and good quality.

GOODRAM DDR2-667 memory modules with a capacity of 512 MB are single-sided and single-rank, equipped with eight standard chips with a capacity of 512 Mbit (64Mx8, four banks) in FBGA packages. The original manufacturer of the chips could not be identified; the chips are marked "GOODRAM". The memory does not have standard heatsinks. The printed circuit board has no special features.

The SPD modules contain standard timing schemes for frequencies of 200, 266 and 333 MHz. In the latter case, the manufacturer guarantees us stable operation at “fives” (5-5-5-15); There is no mention of the required value of the Command Rate mode on the company website, nor are there any recommendations for choosing the supply voltage.

As a rule, GOODRAM memory is supplied in a retail version - in standard plastic boxes. There are no instructions, warranty cards or other accompanying materials included.

The average price of one 512 MB memory module is about $25 (at the time of writing), GOODRAM products can be considered one of the most affordable among well-known brands.

Samsung

Samsung is known to be a leading manufacturer of memory chips. It is also engaged in the production of ready-made memory modules with its own chips, which are usually supplied to OEM manufacturers and system integrators. However, it often happens that OEM products periodically “pop up” on the retail market, so memory modules with the Samsung logo are not difficult to find on sale.

When examining Samsung memory modules externally, one notices an unusual printed circuit board with many signal lines distributed along the top layer. The fact is that this printed circuit board is also used for double-sided modules, but in our case the chips are located only on one side. As in the case of GOODRAM memory, the chips have a 64Mx8 organization, are packaged in standard-sized FBGA packages, and are not provided for cooling.

The SPD block of Samsung modules contains standard timing information for DDR2-667 memory for frequencies of 200, 266 and 333 MHz. The maximum frequency is available at delays of 5-5-5-15.

Samsung memory is usually supplied without packaging or packaging materials.

With an average cost of about $30 for 512 MB, Samsung modules can be called quite expensive; they are usually chosen by users counting on good quality, which should be guaranteed by a well-known brand.

Kingston ValueRAM

Kingston is perhaps one of the most famous and popular manufacturers in the RAM market. Modules with the Kingston logo of various classes can be widely sold - from expensive server memory to SO-DIMM memory for laptops. We will be interested in the line of affordable memory modules for system integrators - ValueRAM (labeled KVR).

Kingston's DDR2-667 memory modules are single-sided; they are equipped, as usual, with eight chips in FBGA packages. The capacity and organization of the chips is exactly the same as that of the memory modules discussed above. The Kingston logo engraved on the housing of the microcircuits hides the true manufacturer from us; it was not possible to find it by the markings right away.

The SPD of Kinston modules contains all the same information about timings for frequencies of 200, 266 and 333 MHz; the memory will work on any boards that support DDR2. A frequency of 333 MHz is guaranteed for timings 5-5-5-15.

Traditionally, Kingston supplies memory in retail packaging, which includes small installation instructions and warranty information. To protect against counterfeiting, the manufacturer applies a logo to the paper sticker that changes color when viewed from different angles.

Again, traditionally, Kingston memory belongs to the upper price category, as it is considered one of the most reliable and high-quality. However, 512 MB modules, even from such a well-known brand, can be found in online stores at a price slightly above $26.

Testing

We decided to test DDR2-667 memory on AMD platform, since it is currently the most profitable option for mid-range computers. The test bench includes:

processor Athlon 64 X2 3800+ (2 GHz, 2 x 512 KB L2 cache);
ASUS M2N-SLI Deluxe motherboard (nForce 570 SLI);
ASUS GeForce 7950GT video card;
hard drive Samsung 180 GB;
Delta 460 W power supply.

Memory modules were tested in pairs in dual-channel mode.

By using BIOS settings Setup we set only basic timings - tCL, tRAS, tRP and tRCD; tRC delay was set as the sum of tRAS and tRP. All other settings for the memory controller AMD processor, and they have ASUS boards a huge number, we set it to “automatic”, otherwise memory testing could drag on indefinitely.

Memory stability at a given frequency was checked using the S&M program version 1.90. The condition for passing the test was to work on tests No. 3 and No. 4 in the "Average" mode, since they are the most sensitive to frequency.

We tested memory modules in the following modes:

Command Rate = 1T, voltage 1.8 V (nominal for DDR2 memory);
Command Rate = 1T, voltage 2.1 V (relatively safe voltage for memory without heatsinks);
Command Rate = 2T, voltage 1.8 V;
Command Rate = 2T, voltage 2.1 V.

Note that the Command Rate 1T mode for the Socket AM2 platform is one of the most important for performance. However, it often does not work on many motherboards, or more precisely, on board + memory combinations. Therefore, we also tested the 2T mode.

The maximum clock frequency was measured for three sets of timings - 3-3-3-9, 4-4-4-12 and 5-5-5-15, in accordance with the SPD profiles.

	Voltage 1.8 V, CMD1			Voltage 2.1 V, CMD1			Voltage 1.8 V, CMD2			Voltage 2.1 V, CMD2
	3-3-3-9	4-4-4-12	5-5-5-15	3-3-3-9	4-4-4-12	5-5-5-15	3-3-3-9	4-4-4-12	5-5-5-15	3-3-3-9	4-4-4-12	5-5-5-15
GOODRAM	546	606	606	606	606	606	566	734	812	642	860	908
Samsung	500	666	758	516	668	762	506	668	824	516	686	848
Kingston ValueRAM	530	690	692	648	692	704	542	710	764	654	860	912

We got the following results:

Samsung memory showed the best results with timings of 5-5-5-15. In particular, it managed to achieve a frequency of 758 (379) MHz at nominal voltage and Command Rate 1T, which is much better than the results of Kingston and GOODRAM. However, we noted that Samsung practically does not respond to increased voltage, as well as to an increase in Command Rate.
GOODRAM memory did not want to work at Command Rate 1T on the ASUS board; it barely reached 600 MHz, despite the increased timings. On the other hand, at Command Rate 2T its results are high, and at rated voltage it is the leader in our test.
Kinston memory does not have any striking features. It works stably at Command Rate 1T, reaching a frequency of 700 (350) MHz already at “four”. It reacts well to increased voltage, but at nominal, alas, its results are not always high.

Note that when the supply voltage was increased, the Kinston and GOODRAM modules were able to take the barrier to 900 (450) MHz, and at the nominal - 800 (400) MHz. The standard clock frequency of all tested memory modules is also available at timings of 4-4-4-12. Thus, with skillful configuration, DDR2-667 memory is quite capable of replacing DDR2-800.

Conclusions

Based on the testing results, we did not identify any clear leaders - each of the modules excelled in some mode. The record at Command Rate 2T belongs to Kingston, at Command Rate 1T - to Samsung.

GOODRAM. The modules are completely worth their cost. The memory lends itself well to overclocking with increasing voltage, reaching the highest frequencies even at a nominal 1.8 V. The anomaly with Command Rate 1T is most likely explained by the BIOS features of the test motherboard.

Kingston. Although in a number of cases this memory demonstrated the best results, we did not see anything outstanding in the overclocking results. Which, in general, agrees with the opinion of the manufacturer, who positions the ValueRAM line as reliable, but with basic capabilities.

Thank you online storewww.Event-pc.com for the provided GOODRAM memory

Thank you online storewww.Ultraprice.by for the provided Samsung memory

We thank JSC "ASBIS" for providing Kingston memory

I received a question from Alexander Shilin:

Folks, I have this question, but if my mother’s ceiling says 600+, then 667 strips will do? I didn’t see anything with a frequency of 600 at all, I only saw 667 and higher.

To be honest, it was not possible to find a motherboard that supports memory with an operating frequency of no higher than 600 MHz, and RAM with a frequency of 667 MHz has almost disappeared from sale.

But we were able to find motherboards whose specifications stated support for DDR2 667/533/400, but not a word about DDR2 800. One of these boards is ASUS P5LD2 based on the Intel 945P chipset.

The chipset is old, and, most likely, when a computer with such motherboard was assembled, then no more than 1GB of memory was installed in it, or even only 512MB. However, no one has canceled the desire to increase computer performance by increasing the amount of RAM.

Only memory stores with the required characteristics of DDR2 667/533/400 are not available in stores, but only DDR2 800. Is it possible to install it? Will it work?

Can.

To verify this, let's run CPU-Z program, which I already praised when I wrote about it. Only this time we’ll open the SPD tab.

Here is an example for DDR2 PC2-5300, 667MHz:

DDR2 PC6400, 800MHz:

But the memory, officially labeled as DDR2 PC6400, 800 MHz, but supports operation at a frequency of 1066 MHz:

The most interesting line for us in this case is the Frequency line in the Timings Table section. Only the Frequency value must be multiplied by 2 to obtain the values indicated in the price lists and manuals for the mat. boards

In general, SPD is a system of profiles hardwired into RAM, which tells the motherboard through the BIOS at what frequency a given stick is capable of operating.

And then it is clear that DDR2 PC2-5300, 667 MHz can operate not only at 667 MHz, but also at 533 MHz, and even 400 MHz.

The same can be said about DDR2 PC6400, 800MHz. The lack of mention in the plate about the possibility of operating at a frequency of 667 MHz is caused, I believe, to save space.

I think that the latest bar will work even at a frequency of 400 MHz. But from an economic point of view, buying in this case is very strange.

So buy DDR2 PC6400, 800MHz and feel free to install it on a motherboard that only supports DDR2 667/533/400. Everything will work great and even more reliably, because... such a bar will have a noticeable margin of safety, instead of working at the limit. 🙂

28 comments

Ilya(29 July 2009, 15:56)

On boards that support only slow memory, you can install fast memory - it will simply work on the maximum supported motherboard. speed board (i.e. low).

(29 July 2009, 16:01)

Ilya, in fact, wrote about this, only in order not to be unfounded, he added several images. 🙂

Anton Molodoy(30 July 2009, 11:30)

>ASUS P5LD2 on Intel 945P chipset.
I have exactly such a mother :)

>when a computer with such a motherboard was assembled, no more than 1GB of memory was installed in it, or even only 512MB.
I'm probably ebony. but I have 3GB. I love it when there is a LOT of memory.

(30 July 2009, 13:40)

Anton, geeks don't count. 🙂
I meant the standard configs that are sold to people.

Igor(27 August 2009, 00:56)

In general, I'm one radish confused in this memory. The laptop supports 533MHz, there was a double bank of 512MB PC4200 running at 266MHz. I installed the PC6400 (800) and thought it would work at 533 MHz. But it is not at all like that - 399 MHz. In short, I “clicked” the screenshots and pasted them here: http://komp-kompyuterov.narod.ru/index.html What’s what? Or is everything right 400x2=800.=)…I guess my enlightenment is later. Then why are they fooling people with eight hundred megahertz?

(27 August 2009, 07:01)

Igor, 800 is, obviously, when the two-channel mode is activated: 2 channels of 400 MHz in total give 800.

In the case of laptops, it's even trickier. This screenshot clearly shows that the maximum frequency (RAM Max support) is 533 MHz. Those. in the case of one bracket - 266 MHz.

But there is no need to be upset. 🙂 2GB is in any case much better than 512MB, and 800MHz is now no more expensive than 533.

Igor(28 August 2009, 09:51)

Well, at least the issue with “grabbing” from the swap has now been resolved. And sometimes it slowed down like a child. :)
Well, in short, I didn’t manage to indulge myself enough in the innovation. A terrible thing happened to the laptop. (I didn’t shed my mother’s blood, but..) By the way, as a result of what happened, when I tried to open an MP3 with Windows, MP writes that “the operation could not be completed due to lack of memory.” Well, isn’t it a mockery? :) And the classic player opens Fine. And there are still a lot of bad things present. Well this already applies to Windows problems or security. Maybe there is a relevant topic here somewhere? Or are we going offtopic here? Then I’ll write about the problem globally.

(28 August 2009, 09:55)
Igor(30 August 2009, 04:06)

Well, as they say, once such a p... uh... sorting out began. 🙂 First, the total of the 1st episode; objects (folders, shortcuts, etc.) seemed to be nailed down and were not moved by any click, “insert” stopped working context menu(always inactive), these same errors were not clicked in the error logs to see the description when logging into accounts empty window without selecting anything, in the task manager the absence of a loved one in the users tab and generally loss of administrator rights, partial or complete xs (message when trying to launch an application on drive D), processes in the task manager instead of +50 remained 30+, periodic reboots with blue screen (flickering quickly, you don’t have time to look at what’s written there), later we managed to figure out the error code
Error code 10000050, parameter1 8f640cec, parameter2 00000001, parameter3 805b641a, parameter4 00000000.
Error code 10000050, parameter1 c399ff20, parameter2 00000000, parameter3 bf80dd9b, parameter4 00000000.
something like this, when I try to scan for viruses, there is also a reboot (in fact, I tried to fight them for 3 days), messages about a broken file system in C, and so on and so forth. The main problem was to remove texts with passwords/logins. I was already mentally ready to rewrite it manually, but remembering about the Windows disk, I successfully used the file transfer wizard. (fine-soft ones are not as bad as they really are =))) I don’t remember how it all started, but definitely after that As soon as I started manipulating the memory, I still remember there was something freezing, scandisk and off we go. I tried to restore the system - again an error and a reboot. (now in the pad I write Ctrl+S after each sentence, because the reptile regularly reboots:(). Everything described was running with home edishin, the second XP (cut off from game edit) also almost didn’t start at all, complaining about the broken C. C safe mode nothing good came of it either. Having pushed around, I pulled up heavy artillery and Acronis True Image Home 11.0 restored logical C sector by sector. Everything seemed to work normally (although right now there is such confusion in my head that I can’t guarantee anything :)) And the second axis started working. I exchanged the memory (goodram) I think maybe the bracket was buggy. I inserted it, everything seemed to be fine in PC Wizard 2008, I even tested it, it showed something like my old 4200. Oh well, I connected to DSL and let’s download new things. The image of Acronis was already in October 2008, albeit with almost all the necessary programs. Well, here I am sitting here, stuffing an iron friend... and bam. Again the old song. There hasn't been a reboot... mother... for a long time. Similar codes, application error log is already corrupted. Something was freezing (again, beyond my memory:), Scandisk was checking something there. True, this time there was no folder on the disk where there is 000 at the end.
So I'm back again after the reboot. :) Some crap wanted to go to the Internet (it's disabled), I banned it in Komodo. Then I went into it to see in more detail what it was, clicked in the log... an error window and a reboot. After the error message savedump.exe and now there is no record of this event. Somehow I don’t even know what to think. Maybe it really is some kind of virus. Maybe some idiot (I can’t hold back anymore) registered in the MBR? Well, Acronis is registered there (recovery at boot). True, launching it with the choice F11 (recovery) 2-3 times yesterday, and even now displays MBR error 2. Maybe there’s something wrong here? In short, I have no strength. I lay it out and go to bed. Tomorrow (today) I’ll restore it again with aronise and see how it develops with the old memory. PS By the way, the day before I fitted the mouse with a double-click button... Maybe there’s something here? =)))))) ZYY I’m stuck, I can’t tear myself away. Overloaded again. And again I got into some kind of small-soft synchronizer. Something like this. ZYYY I couldn’t go into reboot with firelis, I spat and installed my RAM. It seems to last for some minutes. :) That memory was so hot...even though it’s a laptop.

Igor(30 August 2009, 04:09)

How do I feel about banning unique content? :) True, I didn’t make any paragraphs...
The peephole test turned out well. :))

(30 August 2009, 08:33)

Igor, this doesn’t look like a memory anymore, especially considering its replacement.
It's like:

1. Virus. It would be nice to boot from some Live CD and check “Dr.Web CureIt!”, since it doesn’t need installation.

2. But it looks even more like death hard drive. Again, it’s better to run the check from a Live CD, but as a last resort, you can just try a Windows one. And look for a utility from the HDD manufacturer.

Igor(30 August 2009, 15:49)

3. And it also looks like a poltergeist. :)
In short, it’s memory, Goodram’s RAM. Probably some kind of incompatibility. Now on its native Hyundai Electronics, a real branded Korean, with civil stamping everything works without failures already in the morning. Even from the night - as established. And the other system started without problems - I ran through Perfect World. True, the remaining damage will have to be repaired. For the first time, I returned my memory to a much more dead system, so there was apparently no result.
Tested the system - no failures. The event log remains damaged
day. In Comodo Firewall, everything is also normal in its log. Dawes-
I installed some updates on my computer and after that the following appeared:
fight. msfeedssync.exe is breaking into the network. Firefox using IE
not running at all. Why the hell does it bother checking news feeds?
or whatever. Well, as for the HDD, my health is 88%, but before the crisis it worked fine in my opinion. Maybe he felt bad
when did you install the new memory? In general, I will restore it somehow
OS, I will update all the other hardware and the disk image in Acronis. Then maybe I’ll stick it in with goodram if I don’t give it back before then. And I have to think about what kind of memory to look for, or rather, to find at least something that works for my machine. At that point, this is the only one in stock for laptops. And we know and use CureIt, since literally half a month ago I picked up “something” (Neshta) and tried to treat it on two computers. Now I checked with CureIt - everything is clean.
True, he always swears at Giljabi.exe from my lg_swupdate directory. But I think everything is fine here. :)

PS I wonder if there might be a virus in my memory that was already stored before me? (type from the manufacturer) :))

Igor(1 September 2009, 19:30)

Heh, in the chaos, such a detail as the amount of memory was not noticed
in one slot. Now I installed 1GB Kingston and so far everything is ok. And I think
that it will continue to be ok. Now it’s M1 and M2 and not like in the “PC Wizard 2008 physical memory_2Gb” screenshot. With another M1 Yes
and I remember that I support 2GB, 1GBx2. Those. in two slots.
All that remains is, if necessary, to put another one in the “bottom” and voila - two-channel
Naya. Well, those who came here according to the subject will now know what horrors
may follow after a seemingly routine operation.

Sergey(November 18, 2009, 20:50)

Hello, Vladimir! I'd be glad to hear your advice.
The memory stick is DDR1 3200, 512 MB. What is better, installing another stick with the same characteristics (DDR1 3200, 512 MB) or a 1 GB stick (to get 1.5 GB)? By the way, the motherboard (Foxconn P4M800P7MA-RS2) has 2 slots for DDR1 and two slots for DDR2. Does it make sense to install DDR2?

(18 November 2009, 20:57)

Sergey, it’s better to install another 1GB and get 1.5GB in total.
You most likely will not notice the difference between DDR1 and DDR2, and in most cases it is impossible to install both types of memory at the same time.

Sergey(19 November 2009, 21:14)

Thank you. What is the probability that the new 1GB stick will work with the old 512MB? I heard that strips with the same parameters, plus a double channel, work better with each other.

Igor(24 November 2009, 16:58)

Absolutely nothing prevents them from working together if the mother supports such a number and in such slots. Memory needs to be increased for running applications. There will be no significant difference between 1.5 and 2 GB if, for example, 1 GB is consumed during operation of the most capacious one. The difference will be if it costs 1 GB and when the program is running, 1.5 GB is taken, i.e. “grabbed” from the swap and, accordingly, slows down due to access to the HDD. See: task manager->performance->peak. How much, when your favorite heavy machine is working, is how much RAM is needed. =) A two-channel system gives an increase of less than 10%, if I’m not mistaken, which is not the point as it is important for the above. Well, as they say, this is my opinion, although it rules at noob-level users. =)

Sergey(February 25, 2010, 00:57)

Artyom(September 15, 2010, 12:51)

mat. My board is exactly from the series that is mentioned in this article, Asus soket 775 P5LD2 SE. Thank you, Vladimir) I’ll try.

Anton(31 January 2013, 14:05)

Hello, the following question:
The ASUS P5LD2 motherboard in its description says that the maximum RAM memory can be installed with a frequency of 667 MHz, but I bought 2 sticks of 2 GB and a frequency of 800 MHz, installed the computer and I really liked it because Previously there was 1GB OP.
But after that, space on the hard drive began to disappear, namely on drive “C” (Windows XP is installed on it)
Could this be due to a limitation? Motherboard?
Or did I catch some kind of virus? because on at the moment Kaspersky without a license, well, it’s not paid for = doesn’t work.

(January 31, 2013, 2:09 pm)

Anton, is there a lot of space missing?
Windows has a page file, it can sometimes depend on the size of the RAM.
There is a sleep mode, when the entire contents of the RAM are saved to the hard drive - and the system always reserves a volume equal to the amount of memory. You can turn it off and the place will return.

Or maybe it's just some kind of coincidence.

Vas!(19 May 2013, 19:34)

Hello! Can you tell me: the Asus motherboard supports memory up to 800 MHz, now it costs 2 x 512 at 533 speed (pc-4300). Is it possible to expand by adding 1 or 2 GB but 800th memory? Zs-4300 is nowhere to buy. Will this combination of 2x512 MB on 533 and 1 or 2 GB on 800 work??? Thank you.

Opana(23 October 2015, 15:43)

Hello, I have slots for DDR3 and DDR4 on my motherboard, is it possible to add another 8Gb*2 DDR3@2133MHz to the 8Gb*2 DDR4@3200MHz?

Tony(27 March 2017, 16:29)

My question is, will this work in Toshiba laptop Satelit A 215? There the frequency will definitely be 667 hertz at the 800 hertz bar, and is there a risk that it won’t start at all? And in general, can you cram more than 4 gigs of RAM there? Or is there 4, the maximum?

Guest(2 July 2018, 10:22)

Ha, P5RD2-VM does not start with 800 memory (officially the ceiling is 667). But she found a crutch - if you stick one 667 and the other 800 together, then everything works.

Vadim(10 October 2018, 12:08)

asrock 945gcm-s does not support 800 MHz memory

Reading time: 7 minutes

Let's now look at the main reasons why your MacBook Pro or Air does not connect to WiFi automatically, although this network is familiar to it, i.e. The password is correct, but it still says that the time has expired.

This article is suitable for everyone MacBook models Pro and Air, released in different years. There may be some differences in architecture or description Mac versions OS.

Causes of the problem

First of all, you need to determine what the problem is. Various information about the error will help you choose the right solution.

Update your software

For Mac computer install all available updates.
If you are using a third-party Wi-Fi router, check whether the latest version firmware. If an update is available, follow the manufacturer's instructions to install it.
Check that the firmware of the Apple Wi-Fi base station is up to date.

Do the symptoms appear on other Wi-Fi devices?

WITH Wi-Fi problems may be connected due to the network or computers connected to it that are equipped with a Wi-Fi module. If other devices connect to the Internet without problems, then most likely the Wi-Fi router is working.

Ask your question to a specialist

Don’t know how to solve a problem with your gadget and need expert advice?

Checking connections

Certain network problems can be caused by disconnected or loose cable connections. We check all power cables and Ethernet cables that are connected to Wi-Fi router. You can solve the problem by checking that the modem and router are turned on, disconnecting and reconnecting Ethernet cables, or replacing damaged cables.

Restarting network devices

Turn off the power to the router or modem for a few seconds, then turn it on again. This way you can solve a number of network problems without taking additional troubleshooting measures.

Checking TCP/IP settings

If the device is connected to Wi-Fi networks, but there is no access to the Internet, then you should check the TCP/IP settings. Select the “Network” area in the “ System Settings" and perform the following steps:

Resetting Wi-Fi settings

In most cases full reset Wi-Fi settings allows you to solve the problem. We carry out the algorithm of actions:

Hardware shutdown of the Wi-Fi module

Increase

This will cause the Wi-Fi module to be disabled, which often solves the problem.

Hardware problems

The Wi-Fi module itself often breaks down, and the situation may manifest itself without visible reasons. Wi-Fi problems may be due to the following:

Contact with moisture.
Voltage drop.
Factory defect.

In almost all of the above situations it is necessary to change Wi-Fi module. Even if a problem occurs, you need to check Wi-Fi antennas. They very rarely break on their own, since they are very securely placed in the display case and are almost not subject to wear.