Diamond Multimedia AMD Radeon HD 6670 PCIE 2GB GDDR3 Video Graphics Card 6670PE32G Bus Type: PCI-Express X16 (PCI Express 2.1) Dynamic power management with ATI PowerPlay technology 2 GB GDDR3 memory ATI Stream technology API Support: DirectX 9.0 and 10.0, 10.1, 11.0 ATI CrossfireX multi-GPU Dual-Link DVI,HDMI,VGA ports