EVGA 512-P3-1150-TR GTS 250 512 MB DDR3 PCI-Express 2.0 Graphics Card PCI Express 2.0 GeForce GTS 250 with 756 MHz clock 512MB of DDR3 memory 2200 MHz memory clock and 1836 MHz shader clock Full DirectX 10 Shader model 4.0 and Open GL 3.0 Support