PhysX on single GPU?

Hamster55

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Apr 16, 2013
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Hello!

First post here, didn't find exactly what I was searching for so here I go:

I have two AMD 6790 cards on a Gigabyte 990FX-UD7 board, and I seek to upgrade the graphics now.

I want PhysX this time. So I am considering getting maybe a GTX660 TI and a cheap, lesser card like the 630 for dedicated PhysX, if possible (or even needed)

But if this causes more microstuttering than having a single card that does both, I'd rather have that. (perhaps a 680?)

I'd also like the ability to SLI the 630 with the 660TI or 680. I've never owned a Nvidia card (except the old 9800GT), so I really have no idea about what cards can SLI. This Gigabyte mobo supports both SLI and Crossfire.I know most models from AMD require a very closely related cards, architechture-wise to do CrossFire, and the charts to figure this out is buried deep in the site.

Questions: (I really like the PhysX games that are available, so please don't tell me about how few there are hehe :)

- The mobo is PCIE 2.0. So does that mean I cannot have a Nvidia card that does both PhysX and 3D on the same card? (Someone said you needed PCI3.0 for this)

TL;DR:
What is good for PhysX?
1. 660Ti for 3D + 630 for PhysX but can be SLI if I want.
2. Single 680 that does both at the same time
3. 660Ti or 680 with something other (SLI compatible) than 630 for PhysX so I can SLI them if i want.

- Any recommendations of what card/cards I want to get ?

Edit:clarify PCIE3
 
Solution
A dedicated PhysX card will not cause microstuttering, since only one card is doing the graphics.

You cannot SLI a 630 with anything else. SLI requires two of the same cards, and a 630 is not SLI capable.

For the most part, you should be able to get away with all the PhysX + graphics on one good card. A GTX 660 Ti, 670, or 680 will do fine in all the latest games. One possible exception, the upcoming Metro: Last Light, which may be a real beast on graphics.

I recommend you go with one good card at first, a GTX 670, then get a second dedicated PhysX card if you feel that you need a little extra boost. A GT630, 640 should be good PhysX cards, and will roughly improve your performance by about 25%, give or take.
A dedicated PhysX card will not cause microstuttering, since only one card is doing the graphics.

You cannot SLI a 630 with anything else. SLI requires two of the same cards, and a 630 is not SLI capable.

For the most part, you should be able to get away with all the PhysX + graphics on one good card. A GTX 660 Ti, 670, or 680 will do fine in all the latest games. One possible exception, the upcoming Metro: Last Light, which may be a real beast on graphics.

I recommend you go with one good card at first, a GTX 670, then get a second dedicated PhysX card if you feel that you need a little extra boost. A GT630, 640 should be good PhysX cards, and will roughly improve your performance by about 25%, give or take.
 
Solution

rex4235

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Jun 9, 2012
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+1

Adding a 8600gtx to a system with a 570 (8600gtx as a dedicated physx card) hurts the performance of the 570 -- its more than capable of doing it on its own
 

Hamster55

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Apr 16, 2013
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Oh yeah sorry, Im using just a single display 1080p.
 

Hamster55

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Apr 16, 2013
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Thanks! this is pretty much what i was thinking after i did the OP.