a dedicated physX card question

[hatchet5891]

I was more or less wondering if there is a limit to where having another card dedicated as a physX card. Basically I am looking at getting a cheap gpu like a gtx 280 or something like that to dedicate as a physX card. Would I be better off getting a card that is more powerful for this or will this card be more than sufficient for handling only physX?

[Alchemist79]

So few games use physx it doesn't really warrant a dedicated card. You would be better off investing in your primary card if it needs it.

[_I_]

even an old high end card will not keep up with a new mid range card for physx
if you want physx, get a gtx970

[Mr Keefy]

GTX 970 + GTX 950 or GTX 750 would probably be OK.

Having a gap of 5 generations will probably cause a bottleneck.

http://youtu.be/cbww3dhzK0M

[hatchet5891]

Ok, good to know. Maybe I will consider getting something closer to my card to do that then. I'm not in any hurry to do this, but I wanted to be some what educated on how to make it work efficiently should I decide to do it. Thanks everyone.

[Carlsberg]

I have tried dedicating physX to one card and the cpu and in each case it made no difference to performance, PhysX puts very little demand on the gpu and most cope with no effort.

[Garius Maximus]

I use a GTX 970 with a GTX 750ti dedicated for PhysX. When benchmarking PhysX I get 10 - 15% increased performance overall. The GTX 750ti rarely utilizes more than 50% of the GPU and usually takes only around 30%. But a lesser GPU provides less overall performance increase. So I'd recommend no less than the GTX 750ti otherwise it'd be better to have a single GTX 980 or 980ti if your budget allows (plus every game will benefit instead of just PhysX capable games).