NVIDIA Quadro NVS 450 by PNY 512MB GDDR3 PCI Express Gen 2 x16 Quad DisplayPort Profesional Business Graphics Board, VCQ450NVS-X16-PB PNY Quadro NVS 450 Graphics Card VCQ450NVS-X16-PB Video Graphics Cards 4 port Chipset: nVidia Quadro NVS 450 Video Memory: 512 MB Memory Interface: 128-bit Bus: PCI-Express x16 Max. Resolution: 2560 x 1600 Connectors: 4x DisplayPort