EVGA GeForce GTX 770 4GB 4096MB 1GB GDDR5 256 Bit DisplayPort HDMI D-I/D-D Classified Hydro Copper Graphics Card 04G-P4-3779-KR Microsoft DirectX 12 API (feature level 11_0) Support Base Clock: 1165 MHz Boost Clock: 1215 MHz Memory Clock: 7010 MHz Effective CUDA Cores: 1536 4096MB GDDR5 256bit Memory NVIDIA TXAA, NVIDIA GPU Boost 2.0, NVIDIA PhysX, NVIDIA FXAA, NVIDIA Adaptive Vertical Sync, NVIDIA Surround, NVIDIA 3D Vision Ready, NVIDIA 3-Way SLI Ready, NVIDIA CUDA Technologies PCI express 3.0