Cinematic gaming experience with unprecedented performance 1GB GDDR5 video memory 800 stream processing units PCI Express 2.0 x 16 bus interface 780 M Hz Engine Clock 925 M Hz X2 Memory Clock 256bit Memory Interface Shader Model 4.1ATI Cross Fire X Multi-GPU Technology ATI Avivo HD Video & Display Platform ATI Power Play Technology Integrated AMD Xilleon HDTV encoder Hardware processed 1080p video playback of Blu-ray Dual display support Direct X 10.1 support Vista Premium-ready