Hello, which Graphic Card would be better at running games in a multi-monitor set up?
The AMD HD Radeon 7870
The Nvidia GTX 660ti?
Both are 2gb, but the only difference I see is that one is 192 bit and the other is 256 bit. If there are any other cards you guys can recommend me to buy, my budget is $300. Thanks!
At $300 you can grab an HD7950 (although that depends on where you live and/or where you're buying it). It will be better for gaming in multi-monitor setup with it's larger memory bus and 3GB VRAM. However, keep in mind with a single GPU setup, you won't max any games at 3x1080p (if that is what you're using).
I live in Toronto and the closest stores in my area are ncix and canada's computers. What are the main features of Nvidia and AMD Radeon? I know that Nvidia has PhysX while AMD has eyefinity. I plan on adding another GPU in the future btw.
As usual, my recommendations for multi-GPU setups are the 2 highest-end GPU (GTX670/680 or HD7950/7970). In your case, the HD7950 is probably as high as you can get right now. There's quite a few 7950 around $300 and some of them are very good ones like Gigabyte's Windforce, Asus DCUII, MSI's Twin Frozr. http://ca.pcpartpicker.com/parts/video-card/#c=71&sort=...
There's not much other gaming features. Current AMD cards overclocks better, Nvidia GTX600 cards have TXAA and Adaptive V-Sync. That's pretty much about it.
My suggestion would be to get a single HD7950 first and see how it performs in your multi-monitor setup. I've seen people saying that a single 7950 can provide playable gaming experience at adequate settings. He only needed another 7950 to crank up the details even more and based on reviews I've seen, it backs up.