HIS RADEON HD 6850 REVIEW

"The HIS Radeon HD 6850 uses the Barts GPU at 775Mhz and has 1GB GDDR5 memory running at 4000Mhz. The HIS Radeon HD 6850 has a 256Bit Memory Interface, 960 Shader Processors and DirectX 11."

http://www.a1review.co.uk/review/his_radeon_hd_6850.htm