yay...

have you checked to see if they are both running at factory speeds? or are they both running at 8500GT clocks? of course you'll see gains with 8500GT SLI over 8600GT single card.. but you should run GPU-Z and check the gpu/mem clocks also.

Yeah me too, i got my 9800gtx+ in sli with my voodoo3. I forgot how i did it though and my digital camera is broken.

I can post a video if you want.. of cod: waw and you'll see that its quite smooth

Post a screen shot of GPUZ showing SLI enabled along with clocks of both cards.

http://www.techpowerup.com/downloads...-Z_v0.3.2.html

Download that and post a Screenshot of each card and sli mode.

Well, its coming up as sli disabled actually... but there was definatly an improvement in performance. How can I try to enable it? Theres nothing in nvidia control panel...

replace the 8500GT with another 8600GT.. it'll work!

EDIT: Maybe the 8500GT isn't so useless after all. You could probably offload CUDA/PhysX to the 8500GT, to free up the 8600GT to render graphics only - this would amount to a "considerable" framerate difference in games that use PhysX ppu.

thats a good idea dogzpaw, i'll have to give that a shot.

definatly an improvement in performance though, games are running smoother than just having the nx8600gt

you cant enable SLI with those cards, has got to be 2 identical GPU's. Isnt CUDA/Physx only available on 9 series cards? because My XFX8600GT wont do CUDA/Physx.
Cheers,
Flux