EVGA GeForce GTX 275 Co-op PhysX 1280 MB DDR3 2.0 PCI-Express Graphics Card 012-P3-1178-TR PCI Express 2.0 GeForce GTX 275 Co-op with 738 + 633 MHz core clocks 1280 MB of DDR3 memory 2200 + 2268 MHz memory clocks and 1782 + 1296 MHz shader clocks Dedicated GTS 250 for PhysX