MSI RADEON R9 280X MSI Radeon R9 280x is Tahiti clocked at 1050Mhz with 3GB GDDR5 clocked at 6000Mhz. MSI Radeon R9 280x has memory interface of 384Bits with 2048 shaders with directx 11.2. MSI Radeon R9 270x is Pitcairn clocked at 1100Mhz with 2GB GDDR5 clocked at 5600Mhz. MSI Radeon R9 270x has memory interface of 256Bits with 1280 shaders 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. CPU is AMD FX 8350 with Gigabyte GA78LMT S2P using Windows 8."