Diamond ATI Radeon HD5870 PCIE 1024 MB GDDR5 Video Card 5870PE51G GPU: ATI Radeon 5870 Bus Type: PCI-Express X16 (PCI Express 2.0) Dynamic power management with ATI PowerPlay technology 1 GB GDDR5 memory API Support: DirectX 9.0 and 10.0, 10.1, 11.0 Open GL3.1