What kind of power does pc2 ddr 533 mhz have? Speed ​​memory standards DDR2. Real Memory Bandwidth

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 an 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 hs (message when trying to launch an application on drive D), processes in the task manager instead of +50 left 30+, periodic reboots with a blue screen (quickly flashing, 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 the heavy artillery and restored Acronis True Image Home 11.0 sector-by-sector logical C. 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 my 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.

If we look at overclocking not from an aesthetic point of view, when you feel a sense of moral satisfaction from the results achieved, but from a practical point of view, then the end result of this very process is getting more performance for less money. As a rule, overclocking enthusiasts do not chase after top-end components, be it video cards, processors or RAM. It is quite enough to competently approach the selection and overclocking of a particular component. system unit and with a certain amount of luck, the component you purchased will be a step, or even several times more productive than in nominal mode. Of course, if you have enough financial resources, no one bothers you to purchase the fastest or already guaranteed overclocked components, but for now, for most of us, this still remains an unaffordable luxury.

Last month we introduced you to a wide range of memory produced by OCZ, including inexpensive modules of the PC2-4200 and PC2-5300 standards. And before that material, and especially after its publication, we received numerous requests to test budget DDR2 memory, which is accessible to many. Considering this fact, in today's material we'll talk on testing the overclocking potential of budget DDR2 RAM modules of the PC2-4200 standard with a capacity of 1 GB. In total, we managed to get twelve modules or six pairs of DDR2-533 from such manufacturers as Patriot, Kingston, Transcend, TwinMOS, Hynix and Samsung for testing:

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All DDR2 SDRAM modules are 240-pin, without error correction mode support, with double-sided chip arrangement in FBGA packaging. The nominal voltage of all memory provided for testing is 1.8 V, the effective frequency is 533 MHz with a theoretical bandwidth of 4.2 GB/sec. Two-channel budget sets (and these are also available for sale) did not take part in today's testing.

Before moving on to the section with review and testing of memory modules, I suggest you familiarize yourself with the test configuration and testing methodology.

1. Test configuration, tools and testing methodology

The memory was tested in dual-channel mode on the following system unit configuration:

• Motherboard: ASUSTek P5B Deluxe/WiFi-AP (Intel P965), LGA 775, BIOS 1004;
  • The chipset is equipped with a Cooler Master Blue Ice Pro cooler (~4500 RPM, 22 ~ 26 dBA);
• CPU: Intel Core 2 Duo E6400 2133 MHz, 1.325 V, L2 2 x 1024 Kb, FSB: 266 MHz x 4, SL9S9 Malay (Conroe, B2);
• CPU cooling system: Zalman CNPS9700 LED, ~1700 RPM;
• Thermal interface: Zalman ZM-STG1;
• Video card: NVIDIA GeForce 7950 GX2 2 x 512 Mb (500/1200 MHz@580/1580 MHz);
• Disk subsystem: SATA-II 320 Gb, Hitachi (HDT725032VLA360), 7200 RPM, 16 Mb, NCQ;
• Case: ATX ASUS ASCOT 6AR2-B Black&Silver (120 mm Cooler Master case fans, ~1200 RPM, ~21 dBA are installed on the intake, exhaust and side walls of the case);
• Power supply: MGE Magnum 500 (500 W) + 80 mm GlacialTech SilentBlade fan (~1700 RPM, 19 dBA).

To cool the RAM modules, an 80 mm fan from the Austrian company Noctua was installed, operating at ~1800 RPM. The modules were installed in pairs in the first and third slots of the board.

GBT GeForce PCX 5900 Let me remind you that the i925X and i915P chipsets support a new type of memory - DDR II, which surpasses DDR I in bandwidth. However, due to higher timings, overall system performance remains at the same level as when using DDR I memory.

So, both chipsets (i925X and i915P) support DDR2-400 and DDR2-533 memory. This means that with a system bus (FSB) frequency of 200 MHz, in the first case the memory operates at a frequency of 100 MHz, in the second - 133 MHz (and due to the features of the DDR2 architecture, this value is quadrupled and we get 400 and 533 MHz, respectively).

Also note that Asus has announced support for DDR2-600 memory in its motherboards. In particular, P5AD2 Premium (i925X) and P5GD2 (i915P) have a corresponding parameter in the memory frequency setting section. In other words, the company's engineers have opened access to an unofficial frequency divider = 34 (MEMCPU).

But in practice we were unable to run the system with this divider.

The first set of memory modules that appeared in our laboratory was Kingmax DDR2-533.


To enlarge, click (~170Kb).

Please note that Kingmax uses its own branding chips to produce these modules.

According to SPD, these modules have the following timings: 3-3-9-3 for a frequency of 100 MHz, and 4-4-12-4 for a frequency of 133 MHz. At standard frequencies, the modules performed all tests flawlessly. And now we will try to find out what the potential of this memory is when overclocked. For this purpose we have assembled a stand with Asus board P5GD2 on the i915P chipset and Pentium4 3.2 GHz processor. The maximum possible FSB frequency at which the system worked stably was 240 MHz. This result is slightly lower than on the Asus P5AD2 board (i925X; max. FSB=250MHz), but unfortunately the latest BIOS for this board (v 1004) does not allow you to manually change memory timings.

As a result, when overclocking with a multiplier of 12 (menu item "DDR2-400") the maximum memory frequency is 120 MHz (DDR2-480), and when using a multiplier of 23 (menu item "DDR2-533") the frequency is 160 MHz (DDR2-640) .

So, the results:

As we can see, Kingmax DDR2-533 memory worked great at minimum timings, up to the highest possible frequency (specifically for this system). Naturally, when the timings were increased, the results did not change. In addition, there is a significant margin for increasing frequency. For example, on the Asus P5AD2 board, this memory operated at a frequency of 166 (DDR2-667) MHz (FSB = 250 MHz; SPD timings).

How good is this result? Maybe all other DDR2 modules will demonstrate the same performance. To clarify this issue, we tested a couple more DDR2-533 modules from an unknown manufacturer (assembled on Samsung chips).

Samsung chips

As it turned out, these noname modules showed significantly worse results. In particular, at minimum timings, the maximum possible memory frequency was 120 MHz (maximum when using a divider of 12). And when using a multiplier of 23 and FSB frequency = 200 MHz (i.e. memory frequency = 133 MHz DDR2-533), the system could only start, but could not load Windows. The situation was somewhat improved by increasing the Vmem voltage to 2.0V - Windows booted and the tests were successful. But increasing the memory frequency by literally 1 MHz led to malfunctions.

Actually, we have determined the potential of both sets of memory. But how to use this information in practice? Questions immediately arise: “Which mode is the most productive: DDR2-400 or DDR2-533?”, “How much does performance change when timings change?”

To answer these questions, we conducted another series of tests. The results are on the next page.

	Content:
	Page 1 - Memory Kingmax DDR2-533 Page 2 - Optimizing DDR2 memory on i925Xi915P chipsets

Optimizing DDR2 memory on i925Xi915P chipsets

So, the first question is: “Which mode is the most productive: DDR2-400 or DDR2-533?” To do this, we set the standard frequency FSB = 200 MHz, timings according to SPD.

	PCMark 2002 (cpumem)	Quake3 (fastest ; fps)	Winrar (KBytes)	ScienceMark (MBytes)
Asus P5AD2; DDR2-400 (SPD)	681610558	456.1	398	4089.81
Asus P5AD2; DDR2-533 (SPD)	680410472	456	398	4086.32
Asus P5GD2; DDR2-400 (SPD)	682510204	468.8	398	4052.54
Asus P5GD2; DDR2-533 (SPD)	680810264	469.8	388	4027.34

The first two lines of results were obtained on a system with an Asus P5AD2 board on the i925X chipset and BIOS 1004.
The second two lines are on the P5GD2 board on the i915P chipset with BIOS version 1001.

As can be seen from the table, the performance of both modes is approximately the same. It turns out that it is not at all necessary to force the memory to work in DDR2-533 mode. Surely we will get higher performance in DDR2-400 mode and lower timings.

The fact is that the bandwidth of DDR2-400 fully satisfies the needs of the Pentium4 processor running on a 200 (800QPB) MHz bus. The processor bus bandwidth is 6.4 GB, and prop. DDR2-400 memory capacity is 6.4GB. And when using DDR2-533, throughput memory increases to 8.5 GB, but the speed of pumping the processor bus does not change. As a result, the user does not receive any increase in speed.

For clarity, I will give the following example: if we need to fill a 2-liter container from a kitchen tap (naturally, completely open), then we will spend the same time if we use a plastic bottle with a neck corresponding to the diameter of the tap (DDR2-400), or a mug with a large neck (DDR2-533), that is, performance depends on the diameter of the water tap (or processor bus.

Now let's see how performance depends on memory timings (FSB=200MHz; memory frequency divider=12 or "DDR2-400"):

	PCMark 2002 (cpumem)	Quake3 (fastest ; fps)	Winrar (KBytes)	ScienceMark (MBytes)
3-3-8-3	680010242	449,4	390	4025,2
3-3-9-3	681810225	470,3	389	4106,77
3-4-8-4	680010060	459	360	4081
3-4-12-4	680910067	454,4	351	4079,48
4-3-8-3	680010079	446	378	4023,68
4-4-8-4	68059893	452,9	350	3987,71
4-4-12-4	67829896	430	343	3970
5-5-15-5	67769502	413	306	3829,31

Standard timings are shown in bold.

In general, the picture is clear: the lower the memory timings, the higher the system performance. But there are also small subtleties. For example, if we reduce the timings from 3-3-9-3 to 3-3-8-3, then the performance will decrease (and quite noticeably). This indicates that with non-standard timings, some disturbances occur in the synchronization of data signal transmission, which leads to slower operation. As a result, setting timings at random can seriously slow down your computer.

What do we get in the end?

1) For the average user, you can absolutely safely set the memory modules to DDR2-400 mode (i.e., memory frequency divider = 12), as well as SPD timings. As a result, the system will perform at least no worse than with DDR2-533 memory. And in most cases, the system will work faster due to lower timings.

2) For experienced users overclocking their system, DDR2-400 mode is also recommended. Due to lower timings, we get higher performance. And due to the higher memory frequency divider, we have a relatively low memory frequency at a high FSB frequency, which operates at low timings.

From this point of view, Kingmax DDR-533 memory looks very attractive. The most important thing is that it remains operational at frequencies of 160 MHz (DDR2-640) and higher, with the lowest possible timings. In this case, the memory modules operate at standard voltage, which means an increase in overclocking potential as the voltage Vmem increases.

From experience using DDR I modules, we know that memory compatibility with various motherboard models plays a big role. It happens that the same memory shows completely different results on boards from different manufacturers. There are also often cases where memory performance depends on different BIOS versions for the same motherboard.

It is clear that ordinary users this situation is of little concern - they receive a ready-made computer from the company, and all the headaches of selecting memory fall on the assemblers, from this very company. But overclockers will have to sweat when choosing the right combination" motherboard+ RAM".

All questions, comments and suggestions can and should be asked at.

Greetings, my dear readers and visitors! 🙂

Today I would like to consider an issue that, judging by the letters I receive, worries a considerable number of users. Namely, the question about the speed standards of DDR2 RAM: are the differences between them significant? what will be optimal? and etc…

So, today DDR2 reigns on the market; there are several main speed standards for this memory. DDR2-533, DDR2-667, DDR2-800, DDR2-1066. There are others, but these are so-called overclocking standards, the use of which only makes sense when the system is overclocked to extremes.

So, DDR2-533. The lowest speed standard. Why 533? 533 is the module operating frequency in MHz. Today there is not much memory of this standard (available for free for desktop PCs) - it is leaving the market. Why? Because today we can see probably the lowest prices for RAM DDR2. There are many manufacturers, many models, a lot of memory, etc. In general, there are many reasons, but that’s not what I’m talking about now... DDR2-533 was previously relevant in light of its extreme cheapness, but today this is a little different - all memory is cheap. DDR2-533 was used mainly in office and low-cost home PCs. Today, memory of this standard is used in some laptops.

DDR2-667- average. In a good way. In 2007, memory of this standard was the most common in home universal desktop computers. It already operates at a frequency of 667 MHz. This memory still sells very well today and is usually installed in universal desktop PCs. It is also used in laptops.

DDR2-800- "Older brother". Memory of this standard is very popular this year, 2008, for installation in universal, home and simply high-performance PCs. This was mainly due to a significant reduction in the price of memory of this standard. This memory operates at a frequency of 800 MHz. It can also be installed on laptops.

DDR2-1066- high-performance memory. Not much different from the 800. The only difference is better overclocking potential. Accordingly, this memory is very popular among overclockers who install it in their powerful PCs. When overclocked, it provides even greater performance compared to DDR2-800.

So, brief description given. What are the differences? And the differences, to be honest, are not that strong...

If the memory operates in normal mode, the PC is not overclocked by the user (or overclocked, but slightly), then as a rule there is only a significant difference between DDR2-533 and DDR2-1066 modules. And the difference between DDR2-667, for example, and DDR2-800, one might say, is not at all noticeable in everyday work. Why? This is related to the organization of the memory subsystem and the principles of its operation (I won’t burden you with this, I’ll just mention it 😉). The same can be said about DDR2-533 vs DDR2-667.

As I already mentioned, memory is very cheap these days. Previously (in my opinion, even at the beginning of 2007), prices for memory of different standards differed quite significantly, and you could be faced with a choice - which would be optimal. Today the advice is this: since the price of memory is low, it is better to take, as they say, “to the maximum.” Extra memory performance won't hurt (hmm, if you can even call it extra...). Therefore, in most cases today, the optimal solution for installation in desktop PCs (home, medium/high-performance) is DDR2-800. On average, installing a 2 GB memory kit (800) will cost today on average 1500 rubles.

The only correction: if you are an overclocker and plan to overclock your computer, then it is better to buy DDR2-1066 memory, it will provide the necessary level of overclocking potential.

P.S. Of course, it would be stupid to choose RAM only based on the speed standard! There are still many nuances in choosing memory, such as timings, etc... Therefore, when choosing memory, you must definitely take all this into account (all the points and nuances) and seek help from a specialist.

P.P.S. DDR3 is gradually entering the market. What is this? Is it profitable to use this memory?... I will soon try to answer all these questions on the pages of this site.