ASUS RADEON HD 7770 - "Asus Radeon HD 7770 review also features Powercolor Radeon HD 6790. Asus Radeon HD 7770 uses Capeverde GPU at 1000Mhz and has 1GB GDDR5 memory running at 4500Mhz. Asus Radeon HD 7770 has a 128Bit Memory Interface, 640 Shader Processors and DirectX 11.1. Powercolor Radeon HD 6790 uses Barts GPU at 840Mhz and has 1GB GDDR5 memory running at 4200Mhz. Powercolor Radeon HD 6790 has a 256Bit Memory Interface, 800 Shader Processors and DirectX 11. We will be testing Asus Radeon HD 7770 and Powercolor Radeon HD 6790 using Battlefield 3, Crysis 2, Diablo 3, Dragon Age II, Max Payne 3, Sleeping Dogs and Elder Scrolls V Skyrim."