EVGA GeForce GTX 570 HD 1280 MB GDDR5 Dual PCI Express 2.0 DVI/HDMI/DisplayPort SLI Ready Graphics Card, 012-P3-1571-KR 3800 MHz effective memory clock and 1464 MHz shader clock nVidia 2-way and 3-way SLI ready 1280 MB, 320-bit GDDR5 memory PCI Express 2.0 support Interfaces: PCI-E 2.0 16x, DVI-I, DVI-I, Mini-HDMI; SLI-capable