GIGABYTE RADEON R9 290X Gigabyte Radeon R9 290x is Hawaii clocked at 1040Mhz with 4GB GDDR5 clocked at 5000mhz. Gigabyte Radeon R9 290x is 512bit with 2816 shaders with directx 11.2 with TDP of 250. Gigabyte Radeon R9 270x is Pitcairn clocked at 1020Mhz with 2GB GDDR5 clocked at 5600Mhz. Gigabyte Radeon R9 270x is 256bit with 1280 shaders with directx 11.2 with TDP of 180. Benchmarks for testing Gigabyte Radeon R9 290x and Gigabyte Radeon R9 270x are as follows:- Battlefield 3, Bioshock Infinite, Dirt 3, Farcry 3, Hitman Absolution, Max Payne 3, Resident Evil 6 and Tomb Raider 3. AMD FX 8350 with Gigabyte GA78LMT S2P using Windows 8."