XFX NVIDIA Graphic Card GeForce 8400 GS Bus Type PCI-E 2.0 GPU Clock Memory Bus 64-bit Memory Type DDR2 Memory Size 512 MB Memory Speed 1066 MHz Thermal Solution Fansink Minimum Power Supply Requirement 400 Watt Max Supported Resolution (DIGITAL) 2560 x 1600 Max Supported Resolution (ANALOG) 2048 x 1536 GeForce 2560 x 1600 Digital.