ASUS RADEON R9 270X is Pitcairn clocked at 1120Mhz with 2GB GDDR5 clocked at 5600mhz. Asus Radeon R9 270x has a memory interface of 256bit with 1280 shader processors with support for directx 11.2 with TDP of 180. Sapphire Radeon R9 270x is Pitcairn clocked at 1020Mhz with 2GB GDDR5 clocked at 5600Mhz. Sapphire Radeon R9 270x has a memory interface of 256bits with 1280 shader processors with support for directx 11.2 with TDP of 180. benchmark software we are using for testing Asus Radeon R9 270x and Sapphire Radeon R9 270x 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 using Windows 7."