A question about sli dedicated physx

[tonybony]

I have a question for anyone who knows.
I'm currently running a system with two gtx 660ti gpu's & i'm looking to add a third, low profile card to use as a dedicated physx card. I've never used a physx card before so i don't really know which to buy.
I've seen a zotac geforce gt 640 & was wondering whether or not it would be compatible with my set up & if so, would it be a decent addition?

 

[burdenbound]

In my opinion I think you should just skip running a dedicated physx card. Unless there is a specific game which you know your going to get much better performance with it I feel that it is a waste of money and just adds more heat to your system. When not being used for physx (which is only in a handful of games) it is sucking up power and not adding anything of value.

 

[17seconds]

Get one of the new GTX 750 or 750 Ti's. They have very low power consumption, yet high CUDA core counts, and high clock speeds. A 640 will be fine, but the 750's are the ultimate PhysX cards.
http://1pcent.com/?p=169
http://alienbabeltech.com/main/using-maxwells-gtx-750-ti-dedicated-physx-card/

What GPU accelerated PhysX games do you intend to play?
http://www.physxinfo.com/