ASUS EN8400GS SILENT/HTP/512M GeForce 8400 GS 512MB 64-bit GDDR2 PCI Express x16 HDCP Ready Video Card API Supported - Full Microsoft DirectX 10 Shader Model 4.0 Support Video Input - VGA DVI-I HDTV Graphics Processor - GeForce 8400GS - Support PCI-Express 1.0 & PCI-Express 2.0 Specifications