ASUS Radeon EAH5850
 

If we had an award for the "best bang for the buck", it would require little thinking to give it to ATI's Radeon HD 5850. For the price, it offers incredible power, superb power consumption, and of course, DirectX 11 support. We're taking a look at ASUS' version here, which along with Dirt 2, includes a surprisingly useful overclocking tool.
http://techgage.com/article/asus_radeon_eah5850/