EVGA 512-P3-N871-AR GeForce 9800GTX 512MB DDR3 PCI-E 2.0 Graphics Card PCI Express 2.0 Compatible GeForce 9800 GTX with 675MHz clock 512MB 256-bit 0.8 ns GDDR3 memory 1100 MHz clock/2.2 GHz effective memory rate Full DirectX 10 and Open GL 2.1 Support