EVGA GeForce GTX 580 3072 MB GDDR5 PCB PCI Express 2.0 2DVI/Mini-HDMI SLI Ready Limited Graphics Card, 03G-P3-1584-AR NVIDIA 2-way, 3-way and 4-way SLI ready 4008 MHz memory clock and 1544 MHz shader clock PCI Express 2.0 GEForce GTX 580 with 772 MHz core clock 3072 MB 384-bit GDDR5 memory GEForce GTX 580 with 772 MHz core clock PCI Express 2.0 3072 MB 384-bit GDDR5 memory 4008 MHz memory clock and 1544 MHz shader clock NVIDIA 2-way, 3-way and 4-way SLI ready