EVGA GeForce GTX 580 CLASSIFIED ULTRA, 3072MB GDDR5, 4-Way SLI ready, Dual-DualLink DVI, PCI-E 2.0 SLI Graphics Card (03G-P3-1595-AR ) Classified Ultra Core Clock of 900MHz 3072MB GDDR5 Memory Clock = 4212 MHz, Shader Clock = 1800 MHz, CUDA Cores = 512 NVidia Cuda, PhysX, PureVideo HD, 3D Vision Surround Technologies 2-Way, 3-Way and 4-Way SLI ready Two DualLink DVI-I HDCP capable connectors EVBot Connector Includes EVGA Precision Tuning Utility Lifetime Upon Registration at EVGA.com within 30 days of purchase