hey guys i'm building a new PC and i just wondering what graphics card is recommended for physx i have a GTX 580 and i watched a guy on youtube useing a GTS 450 with a GTX 480 and gain more performance but the comments on youtube said the GTS 450 was over the top
well i do want performance addons but i came to that it not really worth it a GTX 580 is a awsome card it blows everything out of the water so i think it bit over top to get another card for physx just lil more unnfff
How much power you need for a dedicated PhysX card depends on the game. I would have recommended two 570's over a single 580 with a dedicated physX card, but it sounds like you already have the 580.
I have used a 9800GT as a physX card and found it wasn't enough power for Sacred 2 PhysX. I know it's not enough for Dark Void (didn't get good rating anyways). It would be fine for Metro 2033. It would mostly be enough with Batman AA, but not as good as a 260.
A 450 seems like a reasonable choice, but if you had a chance to change that 580 into two 570's, I'd go that route instead.
oh i have a way out ... i'm just taking thier 25 year plan to pay it off and condensing it to 1.5 years... so i'm (sort of) broke but its cause i am planning on being out from under it in another 6 months, then i want my house paid off inanother 4 so 5 years out i owe nothign to anybody... i live liek i'm broke though to save money and work 3 jobs/run a small buisness of my own hopefully it'll be worth it in the end
I've been using a GT 240 on a PCIe 4x lane, so it tops out at around 80% usage (bandwidth limited). Honestly I've never noticed framerate drops because of PhysX (as in framerates were pretty much the same with or without PhysX/or high vs low PhysX usage). I've played Mafia 2, Metro 2033, Batman, Mirror's Edge, and a bit of Dark Void.
So 9800GT is a tad faster than GT 240, but anyway all I'm saying is you REALLY don't need a lot. It mostly comes down to the core count AFAIK.
There's a post a little down and the guy writes:
"I get an average of 67fps with SLI GTX480s and letting them handle both 3D and PhysX and 96fps avg with the 8800GTS handling PhysX in this game." that 8800GTS has 96 stream processors.
Nice motto, although I'm certain that my FPS was a constant 60FPS throught the game (1080p, max settings), with one notable exception of a "hideout" exploding causing huge lag. But the rest of the game was very smooth, and I'm only using a GT 240 as I said. I also have kept a very close eye on GPU usage via Afterburner and in the most intensive games it's rarely averaging more than 30-40% usage. Understandably then you'll see lower peak numbers but MOST of the time it won't make a big difference.
All that said, it does go to show that ~200 CUDA cores is going to deliver optimal performance. So GTX 260 or GTS 450.