The features of the 9400 GT 01G-P3-N945-LR include the GeForce 9400 GT(550MHz clock) chipset, 1GB of 128-bit DDR2 memory with a 400 MHz clock with an effective rate of 800 MHz, 1400MHz Shader Clock, 16 processing cores, PCI Express 2.0 compatibility, Dual DVI-I connectors, 12.8GB per second memory bandwidth, NVIDIA unified architecture, Full Microsoft DirectX 10 support, NVIDIA PureVideo HD technology, and OPEN GL 2.1 support. Built for Microsoft Windows Vista.