STRIX-GTX980-DC2OC-4GD5 4GB 256-Bit GDDR5 PCI Express 3.0 HDCP Ready SLI Support. 4GB 256-Bit GDDR5. Core Clock 1178 MHz and Boost Clock 1279 MHz. 1 of each: DVI-I, HDMI 2.0. 3 DisplayPorts. 2048 CUDA Cores. PCI Express 3.0.