ASUS STRIX GeForce GTX 970 Overclocked 4 GB DDR5 256-bit DisplayPort HDMI 2.0 DVI-I Graphics Card DirectCU II + 0dB fan technology; silent gaming at 30% cooler. Fits PCI Express 3.0 bus. ASUS GPU Tweak Utility Real-time and intuitive tweaking software. Gigantic 4GB 7010 MHz GDDR5 memory, 256-bit interface. DIGI+ VRM with 6-phase Super Alloy Power. GPU Boost Clock : 1253 MHz, GPU Base Clock : 1114 MHz Interface: DVI, Output : Yes x 1 (DVI-I), Yes x 1 (DVI-D), HDMI Output : Yes x 1 (HDMI 2.0), Display Port : Yes x 1 (Regular DP), HDCP Support : Yes