ATI Radeon HD 5770 1 GB DDR5 ATI Radeon HD 5770 graphics processor is the first ever to deliver full support for Microsoft's all new DirectX 11. This spectacular new GPU delivers rich, realistic visuals and explosive HD gaming performance so you'll completely dominate the competition Plus, this Diamond ATI Radeon HD 5800 Series graphics processor is ready for Microsoft Windows 7. PCI Express 2.0, 1080P SUPPORT 1GB DDR5 ATI CrossFireX multi-GPU support for highly scalable performance. Interface Speed x16, Memory Clock 4900MHz