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SLI proformance SUCKS! Please HELP!!

post #1 of 90
Thread Starter 
Hey OCN. I got a second EVGA 8800GT Superclocked and ran SLI. The gamign speeds did not increase They are the same as a single card! any one know a reason for this?
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post #2 of 90
Well I'm no AMD expert but is it possible that the CPU your using is bottlenecking the GPUs?

What games are you testing?

Try running GPUZ to see if there is any problems. Swap between the 2 cards in GPUZ to see if there are differences.

Also, run 3DMark (06 or Vantage or both) without SLi. Then run it with SLi. Compare the scores.
If there is an increase in score - then you're fine.
If there is no increase, then try reseating your cards, cleaning out your drivers, and then reinstalling drivers.
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post #3 of 90
Depends on the game.
post #4 of 90
Have you checked in your bios for an option called "Broadcast SLI" or something of the sort thats related to SLI operation?

Im not familiar with the M2N32, but the M2N-SLI Dx doesnt have any options, it's worth checking though
    
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post #5 of 90
Thread Starter 
I playing COD4, COD2, Crysis, CoH.
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post #6 of 90
What game. nvidias reccomended mode for WoW for example is single GPU mode.(non SLI)
post #7 of 90
Quote:
Originally Posted by bver View Post
What game. nvidias reccomended mode for WoW for example is single GPU mode.(non SLI)
<offtopic>
which drivers would that be in? Cus on every game I play, the NvCpl defaults everything, including WoW to NVIDIA Recommended (SLI)
</offtopic>
    
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post #8 of 90
Thread Starter 
Quote:
Originally Posted by OmegaNemesis28 View Post
Also, run 3DMark (06 or Vantage or both) without SLi. Then run it with SLi. Compare the scores.
If there is an increase in score - then you're fine.
If there is no increase, then try reseating your cards, cleaning out your drivers, and then reinstalling drivers.
Do i phsicaly take out card or disable SLI in Nvidia Control Panel to benchmark?
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post #9 of 90
just disable SLi. in ncp
ANd btw, at resolutions under 1600x1200, Sli isnt really advantageous.
e.g. When i run TF2 @ 1024x768, i notice no fps increase, yet a slight decrease.
But when i run it at 1600x1200 with 16x AA and 16x AF, i get a 60% fps increase.
Edited by dasparx - 7/5/08 at 12:40am
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post #10 of 90
Thread Starter 
Quote:
Originally Posted by dasparx View Post
just disable SLi. in ncp
ok thanks
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