Originally Posted by Stuntfly02
7970 or 7950 are in my opinion your only choices for bang for buck performance. A Nvidia 690 is obviously better than both of those, but for the price...I would wait for the 7990 from amd if you wanna go that route. The 680 and 670 are great cards from everything I see, but I'm with you on the bang for buck when I'm building a PC. The 2 7900 series cards from AMD are great cards. Obviously different companies have different quality parts. I personally Like XFX, hear LOTS of good things about Sapphire. I have a gigabyte 7950, and while the card is great, its not the best looking, and I have never had a card with this much droop on it. I have to prop it up so that it sits level inside my case or im just afraid of what it will do to my pci-e slot. If you go with XFX make sure to get one of the DD or Double Dissipation versions(2 fan version). Sapphire I hear lots of good stuff about the Vapor-X ones. The 7950s overclock like mad for the most part and you can easily get within reference 7970 performance range by raising mainly your memory frequency.
Also something to think about is some of the 7950s can be "unlocked" so to speak by flashing a 7970 bios to them. This basically gives you all the stream processors and ROPs that the 7970's have turning your card into a 7970. However, most of the companies are using 7970 reference boards for the most recent 7950 revisions so a lot of the newest stock on 7950s this will not work.
Actually, I believe he wanted a single GPU, so a GTX 690 or 7990 wouldnt work anyways.
Everything else, well said. Except don't buy an XFX, period, end of story. Get the Asus version, you will be very happy with it.