Heya,
I've just been given a Gigabyte GTX650 to go with my 780 Lightning, as a dedicated PhysX card.
However, I'm only in 1080p and I've not found more than one or two extra FPS across any of my benchmarks so far (Heaven 4, 3DMark, Cinebench, Tomb Raider, Thief, Hitman, Sleeping Dogs).
Even the infamous Borderlands 2 didn't look any different...
The only notable increase is in the temperatures of my (currently air-cooled) 780!
Have I missed something, or is a dedicated PhysX card really not worth it for the 780?