EVGA GeForce GTX 570 1280MB GDDR5 PCI-Express 2.0 Graphics Card 012-P3-1570-TR GeForce GTX 570 with 732 MHz core clock PCI Express 2.0 1280 MB 320-bit 0.5ns GDDR5 memory 3800 MHz memory clock and 1464 MHz shader clock NVIDIA 2-way and 3-way SLI ready Minimum of a 550 power supply.(Minimum recommended power supply with +12 Volt current rating of 38 Amps.) GeForce GTX 570 delivers massive DirectX 11 tessellation performance so you can crank-up the gaming realism with incredibly detailed environments and characters