ASUS AMD Radeon HD 6870 1 GB GDDR5 Video Card EAH6870/2DI2S/1GD5 ASUS Exclusive Voltage Tweak Technology for up to 50% performance Full Aluminum Cover , Lower surface temperature by 14 Factory Overclocked to 913MHz 1GB GDDR5 for most immersive Multi-screen Gaming Experience ASUS DirectX 11-compatible EAH6800 Series graphics cards tap proprietary AMD Eyefinity technology to expand graphics on up to six screens for a more immersive viewing experience