XFX RADEON R9 270X - "XFX Radeon R9 270x is Pitcairn clocked at 1100Mhz with 2GB GDDR5 clocked at 5800mhz. XFX Radeon R9 270x has a memory interface of 256bits with 1280 shader processors with support for directx 11.2 with TDP of 180. Inno3D GeForce GTX 660 is GK106 clocked at 1059Mhz with 2GB GDDR5 clocked at 6212Mhz. Inno3D GeForce GTX 660 has a memory interface of 192bits with 1344 shader processors with support for directx 11.1 with TDP of 150. benchmark software we are using for testing XFX Radeon R9 270x and Inno3D GeForce GTX 660 is as follows:- Battlefield 3, Bioshock Infinite, Dirt 3, Farcry 3, Hitman Absolution, Max Payne 3, Resident Evil 6 and Tomb Raider 3. CPU is AMD FX 8350 Vishera with Gigabyte GA78LMT S2P Motherboard using Windows 7."