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Old 03-06-07, 09:06 AM   #1
eva2000
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Join Date: Aug 2004
Location: Brisbane, Australia
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Talking 640MB Gainward 8800GTS SLI - memory timings/scaling in 3Dmarks

640MB Gainward 8800GTS SLI
- memory timings/clock effects on 3Dmark performance


I decided to check out what the effects memory timings and memory clocks has on 8800GTS SLI performance on Asus 680i Striker Extreme motherboard. I decided to run each benchmark twice and average the results for:
  • 3dmark2001
  • 3dmark2003
  • 3dmark05
  • 3dmark06

System:
  • Intel Core 2 Extreme X6800 L627A872 B2 Step 6
  • Swiftech Apogee/Radiical Triple Fan Single Pass Rad/MCP655 + Kayl 100W Custom PSU
  • Asus 680i Striker Extreme 0402 bios
  • 2x 640MB Gainward 8800GTS stock HSF SLI @513/1584 stock clocks
  • 2x1GB OCZ PC2-8000 Titanium Alpha VX2
  • 4x80GB Hitachi 7K80 SATAII Raid 0 on SATA3 to SATA6 ports
  • Pioneer DVD Burner
  • 600W OCZ EvoStream

Here's a excel table of the tallied results so far. The system specs used are all listed in the table. I limited the cpu clocks to 8x400FSB = 3200Mhz and memory voltage to 2.35v vdimm max initially for the memory timing/clock combinations for a more realistic idea of what to expect. Then later tried with a higher ceiling of 2.5v vdimm max.

FYI, My 2x1GB OCZ PC2-8000 Titanium Alpha VX2 are capable of around 440-450mhz looser 4-3-3-4 1T at 2.5+ vdimm or 600mhz 5-3-3-4 at 2.45-2.5v vdimm or 640mhz 2T 5-4-3-4 at 2.5+ vdimm.

3200Mhz - 8x400FSB




I'll be adding other memory clock/timing configurations later on so will update the table at http://i4memory.com/showthread.php?t=3773 as I progress

So enjoy
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