Memory Test Configuration

DDR2 memory performance, in timings and required voltage, are equivalent on the AM2 and Core 2 Duo platforms. This was clearly illustrated in Conroe vs. AM2: Memory & Performance. However, the first generation of AM2 on-processor memory controller does not support any memory timings below 3, or memory speeds above DDR2-800, while both these features are supported on the Intel platform. Timings of 2 are available for RAS-to-CAS and RAS Precharge, and DDR2-1067 is a memory speed option on most Intel motherboards. The lack of extended memory timings and memory speeds makes it more difficult to test the newest high-speed DDR2 memories on an AM2 platform.

For these reasons, the Intel platform is the current AnandTech test platform of choice for DDR2 memory. The Core 2 Extreme processor, which has available speed multipliers both up and down, is the processor of choice. Both the Intel and NVIDIA chipsets for Intel Core 2 Duo Socket 775 processors provide the DDR2-1067 memory ratio option, as well as other intermediate values and values higher than DDR2-1067 with some high-end DDR2 memory. When changes are made in future AMD and Intel products the memory test platform will be examined again.

The ASUS P5W-DH is the latest 975X board in the ASUS family and it fully supports all the Core 2 processors. The P5W-DH Deluxe replaced the P5W-D2-E Premium used in past DDR2 reviews. A review of the updated ASUS P5W-DH Deluxe is available in the Conroe Buyers Guide.

Since the Core 2 Duo/Extreme processors run at a quad-pumped FSB of 1067 (base 266), instead of the FSB800 used on earlier Intel processors, the available options on the P5W-DH Deluxe at FSB1067 are particularly well-suited for benchmarking memory when a Core 2 chip powers the system.

Memory Configuration Options/ASUS P5W-DH Deluxe Motherboard
  Auto DDR2-400 DDR2-533 DDR2-667 DDR2-711 DDR2-800 DDR2-889 DDR2-1067
FSB-1067 X X X X X X X X
FSB-800 X X X X   X    
FSB-533 X X X          

The memory test bench uses the following components:

Memory Performance Test Configuration
Processor Intel Core 2 Duo X6800
(Dual core, 2.93GHz, 4MB Unified Cache)
RAM 2x1GB Super Talent T800UX2GC52X1GB G.Skill DDR2-800
2x1GB Patriot DDR2-1066
2x1GB Super Talent DDR2-1000
2x1GB TEAM DDR2-1000
2 x 1GB Corsair CM2X1024-6400C3
2x1GB OCZ Ti Alpha PC2-8000 VX2
Hard Drive Hitachi 250GB SATA2 enabled (16MB Buffer)
Video Card 1 x EVGA 7900GTX - All Standard Tests
Video Drivers NVIDIA 91.47
CPU Cooling Tuniq Tower 120
Power Supply OCZ PowerStream 520W
Motherboard ASUS P5W-DH Deluxe (Intel 975X)
Operating System Windows XP Professional SP2
BIOS AMI 1407 (October 2, 2006)

Core 2 Duo is as much as 35 to 40% faster than the earlier Intel Presler. Therefore the only results shown in this review are DDR2 memories tested on the X6800 (Core 2 Extreme) platform.

Index Stock Memory Performance
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  • Wesley Fink - Wednesday, November 29, 2006 - link

    Pretty is not good by itself, but pretty IS an indication that a company has the resources to compete in the market and that they are proud enough of their product to make it want to stand out.

    Our past experience has been that memory that is amateurishly packaged either improves in "pretty" and stays in the market, or dwindles away in the ugly packaging in which it was introduced.
  • peldor - Wednesday, November 29, 2006 - link

    If pretty is an indication of something about a company then I'm worried about AnandTech. Those line graphs in this article are hideous, and the front page ain't too hot. At least that expanding Crossfire ad isn't running anymore.
  • brshoemak - Wednesday, November 29, 2006 - link

    this is a little OT but I sincerely hope their enthusiast memory is of a higher quality than their standard DDR memory.

    We bought around 30 sticks of Super Talent DDR memory and some Corsair ValueRam from a couple different distributors to build PC's with less than a year ago. So far, 16 (over half) of the Super Talent sticks have gone bad and every time I hear of a new PC problem it's almost always Super Talent memory inside.

    If the enthusiast memory is better quality that's great, but due to my own personal experience I would be wary of their value-segment offerings. JMO
  • Xajel - Wednesday, November 29, 2006 - link

    Users are AMD and Intel, how an Article like this be helpfull if it cover only less than half of the market ?? I hope to see three variants, Intel Core 2, Intel P4 & D and AMD's AM2 platform...
  • Frumious1 - Wednesday, November 29, 2006 - link

    In related news, reading comprehension is on the decline so things need to be pointed out with bold flashing text:

    Page 2:
    DDR2 memory performance, in timings and required voltage, are equivalent on the AM2 and Core 2 Duo platforms. This was clearly illustrated in Conroe vs. AM2: Memory & Performance. However, the first generation of AM2 on-processor memory controller does not support any memory timings below 3, or memory speeds above DDR2-800, while both these features are supported on the Intel platform. Timings of 2 are available for RAS-to-CAS and RAS Precharge, and DDR2-1067 is a memory speed option on most Intel motherboards. The lack of extended memory timings and memory speeds makes it more difficult to test the newest high-speed DDR2 memories on an AM2 platform.

    In other words, the memory timings and voltages you can get are the same on both platforms. Performance with AM2 while keeping CPU speed constant is going to improve slightly with more bandwidth just like on Core 2. Most people after high-end memory are going to overclock anyway, at which point it's just a matter of determining how high you can go with the various RAM.

    Core 2 could use a 1:1 ratio and run with this RAM at up to 2000 FSB. Athlon AM2 could do "1:1" at up to DDR2-1000 as well, but there's no way the HyperTransport bus is going to run at 500 MHz base speed. So you can go with the DDR2-800 divider and get up to around 250 MHz HT speed (a 25% overclock), or you could drop to a lower divider like DDR2-667 and probably hit the limits of your motherboard. If not with the 667 setting then certainly with the DDR2-533 setting. Actual memory speeds on AM2 are a bit different then what you select anyway, depending on CPU, as the final RAM speed is derived from the CPU speed an not from the bus speed.

    This is all beside the point, as the main thing to note is that this value RAM will work extremely well for all but the most demanding enthusiasts.
  • AndyKH - Wednesday, November 29, 2006 - link

    As far as I understand, 533MHz DDR2 will theoretically max out the bandwidth on a 1067MHz FSB, as the memory interface is 128 bits, while FSB is 64 bits. Thus, the only reason that the faster memories perform better is that the timings are relative to the clock speed and will therefore get faster with increased memory clock speed. Is this correct?
  • Wesley Fink - Wednesday, November 29, 2006 - link

    This is partly true. Memory is Double Data Rate so DDR2-533 is the 1:1 match to a quad-pumped FSB base of 266 (1067). Memory ratios run the memory faster, and it performs better, while the base FSB clock remains the same. However, there is also overclcoking. At 1:1 or any given ratio, you can overclock the bus, which overclocks the memory in lock step at the settings you have chosen.

    With the nVidia 680i, for example, we reached a FSB of 2100 (525 quad-pumped), which is almost a 100% FSB overclock. In that case we had to drop memory ratios so the final memory speed would work with a 2100 bus.

    Memory can be clocked higher by ratios or FSB overclocks, or a combination of both. This gives many options in squeezing the most performance from your memory and system.
  • Xajel - Wednesday, November 29, 2006 - link

    the point is not about working and overclockablity or not, it's about compatibility as main concern, some mobos like MSI has hard compatibility with some DDR's like OCZ, some reports they can't even hit DDR2-800 speeds so how about overclocking ??

    some mobos, like those from ASUS ( mainly K8N's ) need BIOS update to make it possible to work with OCZ memories in DDR2-800 in Dual channel mode, a lot of users start there rigs with two stick on only one channel then do BIOS flash update and then rearrange the stick to enable DualChannel.

    some guys need to upgrade but they don't know about compatibility issues they may have with such brand new memory !!
  • JarredWalton - Wednesday, November 29, 2006 - link

    The major concern with compatibility almost always comes from default required voltages. Since this Super Talent requires 1.8V by default, it should work on any DDR2 platform that recognizes the DDR2-800 speed. I'm sure Wes has played with the RAM on more than one motherboard, so if he hasn't made comments about incompatibilities (and he actually mentions the benefits of the 1.8V requirement) then it's about as "safe" as you can get.
  • Cali3350 - Wednesday, November 29, 2006 - link

    When might this be available, and perhaps more inportantly if it already is does anyone know where? I cannot find it anywhere.

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