SAPPHIRE RADEON HD 7770 REVIEW - "The Sapphire Radeon HD 7770 review also featuring the Sapphire Radeon HD 5770. The Sapphire Radeon HD 7770 uses the Cape Verde GPU at 1000Mhz and has 1GB GDDR5 memory running at 4500Mhz. The Sapphire Radeon HD 7770 has a 128Bit Memory Interface, 640 Shader Processors and DirectX 11.1. We will be benchmarking the Sapphire Radeon HD 7770 and Sapphire Radeon HD 5770 using Battlefield 3, Crysis 2, Dirt 3, Dragon Age II, Hard Reset, Modern Warfare 3, Elder Scrolls V and the Shogun 2 games for benchmarking the Sapphire Radeon HD 7770 and Sapphire Radeon HD 5770 Video Cards."