SLI 2x Nvidia 650 vs Crossfire 2x Radeon hd 7770

[caleb85]

I am looking at getting two Nvidia 650 and running them in SLI
http://www.newegg.com/Product/Product.aspx?Item=N82E16814500272
Or i could get two Radeon HD 7770 and run them in crossfire
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202011

I would overclock them, and I will be running them at a 5760x1080 resolution

Which one would offer better performance?

 

[cookybiscuit]

Two 1GB cards in SLI/Crossfire would be appauling for a resolution that high, you'd fill that up even at 1080p. Much better off just getting a 7950, its a little more expensive than two of those, but it has a 3GB frame buffer, so it is more than capable of driving 3 screens. Not to mention its massively faster, and would actually provide enough performance for that resolution to be viable.

 

[caleb85]

If i upgrade the cards to 2 gb ram each, so 4 gb total, would that help?

 

[lt_dan_zsu]

You also need to factor in the 650 can't sli!!! I wouldn't recommend cfx for the 7770 either because it will provide more horsepower than that amount of ram can handle. You're better of with a 7850 that you can upgrade later. You could also get a 7870.

 

[cookybiscuit]

If i upgrade the cards to 2 gb ram each, so 4 gb total, would that help?

No. SLI utilizes alternate frame rendering, two 2GB cards don't equal a total of 4GB available VRAM, as one card still has to store all the data for one frame, and the other card for the next, and so on.

 

[bigshootr8]

Agreed you can not SLi a 650 or 650Ti. I would not go with a 7770 in crossfire as well. Stability and performance wise both solutions are incomparable to a single gpu solution. A GTX660Ti if you go with nvidia is a good solution which to my thinking would probably be what a 650Ti would be in SLi. And a 7850 is a good chip as well in line with the GTX660. In the end you will be much happier with a single GPU solution Caleb.