640MB Gainward 8800GTS SLI - memory timings/scaling in 3Dmarks

[eva2000]

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 (http://i4memory.com/showthread.php?t=3262)


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

http://fileshosts.com/intel/Asus/680i_striker/results/X6800_1/ocz/titaniumalphavx2/8000/0402/8x/unlinked/2t/1_1divider/8800GTS_SLItests/excel_table_results4_wm.png (http://i4memory.com/showthread.php?p=60407#post60407)

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 :D

[K404]

OMG...soo.....many...numbers!

Thanks eva! :D I`ll..err....digest that lot when I feel 100% awake!

[DEVIL K-ce]

Huh Eva :eek:

What a job man :clap:

Very, very nice, thank's for posting.

Regards

Martin

[eva2000]

Thanks made it easier to read - updated table with Percentage and value difference column from the reference clock for each 3dmark table :)

[Micutzu]

Very comprehensive testing and very useful results !
4-3-3 2T seems like the sweetspot for that RAM, have you tried higher volts for it ?

[eva2000]

566mhz 4-3-3-4 tight sub timing 2T needs 2.5v as well so 600mhz 5-3-3-5 would of been better still :)

[eva2000]

I'll let you shove 2.75v vdimm down your own ram.. as I'd like to keep my memory alot longer :D

[bigdaddy25fb]

Nice thread...answers a lot of my questions.

[hausner]

Nice job eva2000! :toast:

[eva2000]

Thanks guys... armed with fast memory bandwidth I cracked my old personal best 8800GTS SLI 3Dmark scores

New PBs

3dmark06 = 16,728
http://service.futuremark.com/compare?3dm06=1391496

http://fileshosts.com/intel/Asus/680i_striker/results/X6800_1/ocz/titaniumalphavx2/8000/0402/10x/unlinked/2t/9_14divider/386-601-5335-3-6-6-8-3-42_1.725-2.5-1.35-1.7-1.6-1.35/8800GTS_SLI/3dmark06_648-2052_16728.png

3dmark05 = 24,654
http://service.futuremark.com/compare?3dm05=2766471

http://fileshosts.com/intel/Asus/680i_striker/results/X6800_1/ocz/titaniumalphavx2/8000/0402/10x/unlinked/2t/9_14divider/386-601-5335-3-6-6-8-3-42_1.725-2.5-1.35-1.7-1.6-1.35/8800GTS_SLI/3dmark05_648-2052_24654.png

3dmark2003 to be run later

3dmark2001 = 74,736
http://service.futuremark.com/compare?2k1=9161872

http://fileshosts.com/intel/Asus/680i_striker/results/X6800_1/ocz/titaniumalphavx2/8000/0402/10x/unlinked/2t/9_14divider/386-601-5335-3-6-6-8-3-42_1.725-2.5-1.35-1.7-1.6-1.35/8800GTS_SLI/3dmark2001_648_2052_74736.png

[G H Z]

Another info packed thread eva, thanks! :toast:

[afireinside]

Wow... You got way to much time eva :p: Amazing job :toast:

Looks like 5-3-3 at high clocks reigns supreme on 680i... Very interesting how it can run 5-3-3 so high.

[fhpchris]

Great job on the work eva :toast: Do you have a kill-o-watt to measure your power consumption?

Do not let it get out that you use a 600W Evostream for 8800 SLI, that is like heresy here!

Apparently, you need to go buy a 1kw psu now :rolleyes:

[wa77ss]

Very good info!

[vanovich]

nice eva,lots off good info ,keep up the skillfull finds .

[STEvil]

no 1T results at 5-x-x-x? :D

[eva2000]

no 1T results at 5-x-x-x? :D
Did some way back IIRC CAS5 didn't help much for higher headroom @1T

[zakelwe]

Excellent work. :toast:

Can ou run tighter subtimings at 400Mhz memory and see what you get for 2001 ?

Regards

Andy

[eva2000]

already had done that from the table :)

Great job on the work eva :toast: Do you have a kill-o-watt to measure your power consumption?

Do not let it get out that you use a 600W Evostream for 8800 SLI, that is like heresy here!

Apparently, you need to go buy a 1kw psu now :rolleyes:

FX-60 + 8800GTS SLI power consumption http://i4memory.com/showpost.php?p=53246&postcount=12


.

[fhpchris]

1.6v on conroe is alot more than 1.4v on a FX60...

a Xeon 3060 @ 1.6v can pull ~430 watts orthos for me, and that was with only one 8800gtx :)

[burton]

Pretty soon chris's psu is going to go BOOM!

[erwinz]

excellent work EVA.. nicely done.. and really a good guide.. :D

thanks for sharing.. :D

this one for you mate :toast:

[engenheiro_ce]

nice job man!!

congratulations!

[eva2000]

thanks guys.. glad you like :D