Powercolor Radeon HD 4850

"The Powercolor Radeon HD 4850 uses the RV770 GPU at 625Mhz and has 1GB GDDR3 memory running at 1986Mhz. The Powercolor Radeon HD 4850 has a 256Bit Memory Interface, 800 Shader Processors and DirectX 11."

http://www.a1review.co.uk/review/powercolor_radeon_hd_4850.htm