EVGA GeForce GTX 580 DoubleShot Superclocked 1536 MB GDDR5 PCI Express 2.0 2DVI/Mini-HDMI SLI Ready Limited Graphics Card, 015-P3-1587-AR GEForce GTX 580 DoubleShot Super clocked with 797 MHz core clock PCI Express 2.0 1536 MB 384-bit 0.4ns GDDR5 memory 4050 MHz memory clock and 1594 MHz shader clock NVIDIA 2-way, 3-way and 4-way SLI ready