EVGA GeForce GTX 770 FTW 4GB Dual DisplayPort HDMI DVI-I/DVI-D Graphics Card with ACX Cooler 04G-P4-3776-KR Microsoft DirectX 12 API (feature level 11_0) Support Base Clock: 1085 MHz, Base: 1137 Boost Clock: 1137 MHz, Base: 1189 Memory Clock: 7010 MHz Effective CUDA Cores: 1536 4096 MB GDDR5 256 bit Memory