Sapphire Radeon HD6850 1GB

The Sapphire Radeon HD6850 1GB has a core clock of 775MHz and a memory clock of 4000MHz. Outputs: 2 x DVI, 1 x DisplayPort, 1 x HDMI. Backed by a 2 year warranty. The SAPPHIRE HD 6800 series features the second generation of graphics technology from AMD designed to support all the features of Microsoft DirectX 11 and DirectCompute 11. The new GPU’s are built in AMD’s 40nm process to deliver high performance with low power consumption. Advanced hardware features include an enhanced Tesselation unit, dedicated HDR Texture compression, multi-threaded communication with system CPU cores, embedded support for many of the DirectCompute 11 instructions, 3D stereoscopic support and HDMI 1.4a.

Reviews and benchmarks:

TechGage
HardOCP
Legit Reviews