Sapphire Radeon R9 290X 4GB GDDR5 Dual DVI-D/HDMI/DP TRI-X OC Version PCI-Express Graphics Card 11226-12-21G 2 x DVI-D 1 x HDMI 1 x DisplayPort 1040 MHz Engine Clock 5200 MHz Effective Memory Clock GDDR5 Memory Type 512 bit Memory Bus