Diamond ATI Radeon HD5870 Eyefinity 6 Edition 2048 MB GDDR5 PCI-Express Video Card 5870PE52G Bus Type: PCI-Express X16 (PCI Express 2.0) Dynamic power management with ATI PowerPlay technology 2 GB GDDR5 memory ATI Eyefinity technology API Support: DirectX 9.0 and 10.0, 10.1, 11.0 Open GL3.2