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SLI 8800GTX overclock question/issue

post #1 of 15
Thread Starter 
Hey all-

I am very excited about getting SLI 8800GTX all good to go, watercooled, driver patched, and lookin sweet from a recent compressed air cleaning. i ran a base line 3Dmark06 score and got 12500 3dmarks

i went to overclock them and to my surprise, i was able to up the clocks 20 points (core clock,memory clock, shader clock). i ran riva tuner to see how stock temps changed with no load they were still at 45c and load temps did not go above 51c (love water cooling).i then ran ATI tool to check for artifacts... none for an hour.

i went into 3DMARK and ran it, i did not see a single change in my 3DMARK score .

does this mean there is a bottle neck? does SLI require more than 2gig of ram? should i OC my q6600 processor? is a 20 point increase significant? (i figured it was)
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post #2 of 15
Should you OC your Q6600? Does that mean it is running at stock 2.4?

You say you have the video cards watercooled, but not your cpu? Your sig rig says it is under water, but is it at not OCed?

You should be running at least 3ghz on your Quad to decrease the bottleneck. 3.5+ preferably.

-Delta
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post #3 of 15
running 2x8800GTX in 3dmark06 is like teasing them cuz 8800GTX's at 1280 is like mucking them. also OC the CPU since 3dmark is more of a CPU mark...
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post #4 of 15
12500 score with 2 GTX's? I was getting almost 13k with just one card.
    
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post #5 of 15
Thread Starter 
Thanks all who posted

i boosted my cpu from 2.4 to 3.2. my 3DMark score shot up 4k... it is now 16000... thanks delta

strange thing is none of my games are showing much of an improvement in gaming? for instance, Company of hero's and Crysis do not run any better than before?

i was trying to get my CPU to 3.5 as delta suggested. strange issue though...

here is my bios essentially under system clocks and FSB

there is a big difference between my setting, which says

FSB - 1420 FREQ 3372.7

and what it says under current...

FSB - 1420 FREQ 3195 .

i should be getting 3.372 out of my processor at 1420 FSB but i am only getting 3.2? any hints?
Edited by trevorama - 5/11/08 at 10:44am
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post #6 of 15
1420FSB means you are running at 355 FSB with a multiplier of x9. 355x9 is your current setting. It reads 1420 because it is 355 per core (x4 cores)=1420.

So you are getting exactly the OC you should be. To get a higher OC you will have to increase your CPU voltage, and possibly your northbridge voltage as well. I don't know the exact BIOS of the eVGA boards, but I'm sure there are some good guides around here.

Is your Q6600 a B3 or a G0 stepping?

There should be a noticeable difference in your gaming from 2.4->3.0+ghz. It could be that you are already averaging above 60fps, in which case you can't tell if you're running at 60fps or 120fps. Try running the Crysis benchmark at stock speeds versus your OCed speeds and I bet you will see a significant difference.
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post #7 of 15
Thread Starter 
thanks delta

i feel like a newb, but i have no idea which stepping it is? here is the link to my CPU.

thats just the thing, im not THAT anal about my frames, lol, i am seeing stuttering in crysis. and yes i have vsync on and tripple buffering enabled. is there a way to see how many frames i am getting in the game? an onscreen FPS indicator?. where is this benchmark program you spoke of? i cant find it in the crysis menu screen.
Edited by trevorama - 5/11/08 at 11:09am
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post #8 of 15
No worries about the n00b questions . We've all been there. First, download CPU-Z. That will give you really good information on your CPU, voltage, stepping, memory, etc. It is invaluable!

As for Vsync, I usually turn it off. I'm not sure if it has a positive or negative effect on Crysis. Also, just as a formality, have you enabled SLI through the Nvidia settings?

Also, to see FPS in crysis, hit the tilde key "`" to bring up the console. Then type r_displayinfo 1

As for running the Crysis, benchmark, see this thread here
Edited by DeltaUpsilon - 5/11/08 at 11:27am
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post #9 of 15
Quote:
Originally Posted by DeltaUpsilon View Post
As for Vsync, I usually turn it off. I'm not sure if it has a positive or negative effect on Crysis. Also, just as a formality, have you enabled SLI through the Nvidia settings?
I am no expert at all, but wouldn't it force the frame rate to 15fps if you couldn't maintain 30fps or 60fps solid? Although I suppose it depends on the refresh rate of your display.
    
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post #10 of 15
Thread Starter 
***? you have to enable SLI?!?!?

LOL, joking, it is and it was enabled.

normal frames in crysis at 1280 by 768 resolution is around 35fps everything at Very High except shadows and post processing. that isnt great is it?

apparently... it says i have stepping B, revision G0

how does this info look to you?
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