I will be getting a GPU soon, and my case and PSU have been changed, now wondering if I should get a 6850 instead of a 6770, money is kind of tight, but if it's so much stronger, then I'll go ahead and spend the extra cash.
I plan to play games like:
The Witcher 2
Well for essentially $40.00 bucks more you get a 256 bit memory interface,instead of 128-bit on the 6770,and 960 stream processors instead of 800. I believe the hd6850 is worth the extra money,however you should consider things like warranty, and if you plan to cf in the future, etc....