I'm looking for a good and cheap graphics card compatible with my GTX 770 that Is just dedicated to physx. Any recommendations?
GTX770 is quite good enough to handle physx without the aid of dedicated physx card.
GTX 770 alone is more than enough to handle physx on 1080p ultra settings!! Anyway if you want a separate card for physx, then i suggest you to buy gt 640 or maybe the gtx 650. Though the gt 640 is enough for 1080p.