Zotac GeForce GTX 560 1 GB GDDR5 PCI Express 2.0 HDMI DVI DisplayPort SLI Ready Graphics Card, ZT-50708-10M 336 Unified Shaders, 256-bit memory bus, Core Clock: 820 MHz, Shader Clock: 1640 MHz, Memory Clock: 4008 MHz NVIDIA Unified Architecture, NVIDIA 3D Vision Surround ready, NVIDIA SLI ready, NVIDIA PhysX & CUDA Technology, NVIDIA PureVideo HD technology, HDMI xvYCC Color & DeepColor technologies, HDMI 1.4a compliant, Hardware-accelerated Blu-ray 3D ready NVIDIA ForceWare Drivers, Microsoft DirectX 11, OpenGL 4.1, Microsoft Windows XP/Vista/7 Dual dual-link DVI (Up to 2560x1600), HDMI 1.4a w/audio, DisplayPort, HDCP ready, SLI bridge connector (2-way SLI ready) ED 480p, HD 720p, HD 1080i, Full HD 1080p 450-watt power supply recommended, 150-watt max power consumption