EVGA 512-P3-N873-AR e-GeForce 9800 GTX + 512 MB DDR3 PCI-Express 2.0 Graphics Card--Lifetime Warranty PCI Express 2.0 Compatible GeForce 9800 GTX with 738MHz clock 512 MB 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