Zotac NVIDIA GeForce GT 640 ZONE Edition 2GB GDDR3 2DVI/Mini HDMI PCI-Express Video Card ZT-60207-20L Chipset: NVIDIA GeForce GT 640, 900 MHz Video Memory: 2GB GDDR3, 1600 MHz Bus: PCI-Express 3.0 x16 (Compatible with 1.1) Max Resolution: 2560 x 1600 Connectors: 2x DVI, Mini HDMI Supports: Windows XP/ Vista/ 7 etc. Memory Interface: 128-bit, 1600 MHz