HIS RADEON R9 280X His Radeon R9 280x is Tahiti clocked at 1050Mhz with 3GB GDDR5 clocked at 6000Mhz. His Radeon R9 280x has memory interface of 384Bits with 2048 shaders with directx 11.2. Powercolor Radeon R9 280x is Tahiti clocked at 1030Mhz with 3GB GDDR5 clocked at 6000Mhz. Powercolor Radeon R9 280x has memory interface of 384Bits with 2048 shader processors with support for directx 11.2. Benchmark software is Battlefield 3, Bioshock Infinite, Dirt 3, Farcry 3, Hitman Absolution, Max Payne 3, Resident Evil 6 and Tomb Raider 3. AMD FX 8350 Vishera CPU with Gigabyte GA78LMT S2P Motherboard using Operating System Windows 8."