Conclusions
Well, there you have it. The Radeon HD 5850 manages to outshine the fastest single-GPU GeForce card overall while costing less, drawing less power, and producing less noise. We wouldn't be surprised to see Nvidia cut prices in the near future, but in any case, t
he 5850 is hands-down the second-fastest single-GPU graphics card on the market.
Performance isn't the 5850's only strength, either. AMD's newcomer also brings
higher-quality antialiasing and filtering algorithms, as well as
next-generation DirectX 11 goodness, so it'll let you enjoy extra eye candy in upcoming games while making old ones look even better. That functionality would be worth a price premium if the 5850 commanded one, but it doesn't—at least not for now.
AMD Radeon HD 5850
September 2009
The Radeon HD 5850 is also a compelling solution for quiet, low-power, or compact builds, since it delivers excellent performance with a
more reasonable power and noise footprint than previous high-end cards. And it
doesn't have a freakishly long circuit board like the Radeon HD 5870, which is always a plus.
http://techreport.com/articles.x/17652/10