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Old 12-01-09, 12:10 AM   #17
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Join Date: May 2005
Posts: 17,982
Default Re: How many of ya using a second for PhysX?

Originally Posted by Llamalama View Post
I have a P55 so if I use the 4x slot for physx would it render my main 16x slot into 8x. Hope this makes sense.
I'm not certain...

It might, or it might not. I don't think the second slot was intended for a video card specifically. Capable? Yes. Intended- maybe. I'm thinking that the two slots *might* not be tied together- thus regardless if slot #2 is occupied or not, your primary one runs at x16.

Though I could be wrong- at the time those mobos were out your could get by running a card in an x4 slot for CrossFire. Not the best idea, but you could do it.

Either way, I don't think going from x16 to x8 will hurt your FPS much. I've not looked into it since the 8800 days, but from what I gather the PCI-e 1.0 interface offered more bandwidth than the cards could consume. I'd only assume the same holds true for the PCI-e 2.0 bandwidth.

In other words- I don't think dropping from x16 to x8 will hurt performance any. To the best of my knowledge, we've yet to saturate PCI-e x16 1.0 bandwidth yet, let alone the bandidth of PCI-e x16 2.0.
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