GIGABYTE RADEON HD 7770 OC - "The Gigabyte Radeon HD 7770 OC review also featuring the Sapphire Radeon HD 7770. The Gigabyte Radeon HD 7770 OC uses the Cape Verde GPU at 1100Mhz and has 1GB GDDR5 memory running at 5000Mhz. The Gigabyte Radeon HD 7770 OC has a 128Bit Memory Interface, 640 Shader Processors and DirectX 11.1. We will be benchmarking the Gigabyte Radeon HD 7770 OC to the Sapphire Radeon HD 7770 using some popular games software such as Aliens Vs Predator, Battlefield 3, Crysis 2, Dirt 3, Hard Reset, Just Cause 2, Left for Dead 2 and Lost Planet 2."