Powered by NVIDIA Ge Force GTX 660 Ti GPU Integrated with the first 2048MB GDDR5 memory & 192-bit memory interface Features Dual link DVI-I/ DVI-D/ HDMI/ Display Port Core Clock: Base / Boost clock:1032 / 1111 MHz Support PCI Express 3.0 x 16 bus interface Support NVIDIA 3D Vision™ Surround & SLI technologies Support NVIDIA CUDA™ Technology Support NVIDIA Phys X™ Technology Support NVIDIA FXAA / TXAA Technology Support NVIDIA Adaptive Vertical Sync Technology System power supply requirement: 450W