I like to see a test whit a geforce gtx 295sli video card and a dedikated physx card like 9800gtc 512 card.
So i can se the performance whit physx and no physx extra card.
I'm not sure if I would second that or not lol...on one hand I would like to see if it would be any different than just using a 295, but on the other, I think it might not make a big difference(but if you got an extra card layin then go for it) considering the 295 already has 2 gpu's that would more than handle the work..I won't say no on seeing this happen thats for sure since i have a few video cards layin around that I could use like that
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From my own tests PhysX isn't that demanding on a high end card. So a card like the GTX 295 would probably see no benefit from having a seperate card dedicated to PhysX. That is my uneducated guess.
It helps in games that are PHYSX intensive, increases the framerates by about 5-10 fps in cryostasis (under full load at 1920x1200 res with full settings) Keeps the main GPUS significantly cooler the 295's sound like dustbusters under full burn stabilized at about 170 oF, at least hushes them up. For any of the games that really work the physX engine, I'd suggest a dedicated card. Even running in quad 295 (which isn't very well supported from what I've experienced). The engine just seems to work better when a card is completely dedicated to it. weird as it may be. For any games that don't use it, the gtx 295's easily handle them at maximum settings and 1920x1200 res.
Sidenote - I've had 2 EVGA black cards (pn ending in 1293) burn out on me in quad sli configuration, calld evga and they acknowledged there is a problem with their current models and quad configuration, as well as cooling, if you're thinking of doing dual 295's or even single go with another brand.