Powercolor Radeon HD 4870

"The Powercolor Radeon HD 4870 uses the RV770 GPU at 780Mhz and has 1GB GDDR5 memory running at 3600Mhz. The Powercolor Radeon HD 4870 has a 256Bit Memory Interface, 800 Shader Processors and DirectX 11."

http://www.a1review.co.uk/review/powercolor_radeon_hd_4870.htm