VisionTek Products Radeon 7790 1GB DDR5 PCI Express Graphics Card (900621) High speed GDDR5 Memory 1GB on board memory GPU Clock 1000Mhz, memory 6000MHz PCI Express 3.0 x16 bus interface DirectX 11-capable graphics, Open GL 4.2 Support Dual Link DVI-I, Single Link DVI-D, HDMI, DisplayPort HDMI video and audio supported AMD Eyefinity multi-display technology - Up to 3 Monitors (AMD Eyefinity technology is supported on this model when all three output connectors are in use. Windows Vista, 7, 8 Supported. Windows XP - limited to 2-monitors)