ZOTAC GeForce GTS 450 1GB GDDR5 PCI Express 2.0 Dual DVI/Mini HDMI/DisplayPort SLI Ready Graphics Card, ZT-40503-10L Chipset: GeForce GTS450 Engine Clock: 810 MHz Video Memory: 1GB DDR5 Memory Clock: 3.608 GHz Memory Interface: 128-bit Bus: PCI-Express 2.0 x16 RAMDAC: 400 MHz Stream Processor: 192 Max. Resolution: 2560 x 1600 Connectors: Dual DVI-I; Mini HDMI; DisplayPort Thermal: Fansink Support Microsoft Windows 7 Support nVidia PhysX Technology Support nVidia CUDA Technology Support nVidia SLI TechnologySupport nVidia PureVideo HD Technology Support Microsoft DirectX 11 and OpenGL 4.0