ASUS RADEON R9 290X Asus Radeon R9 290x is Hawaii clocked at 1050Mhz with 4GB GDDR5 clocked at 5400Mhz. Asus Radeon R9 290x has memory interface of 512Bits with 2816 shaders with directx 11.2. Asus Radeon R9 270x is Pitcairn clocked at 1120Mhz with 2GB GDDR5 clocked at 5600Mhz. Asus Radeon R9 270x has memory interface of 256Bits with 1280 shaders with support for directx 11.2. Benchmarks are 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."