Diamond Multimedia AMD R9 290 PCIE GDDR5 4GB Memory Graphics Card R9290D54GV2 Memory: 4GB GDDR5 Memory Interface: 512-bit Bus Interface: PCI Express 3.0 x16 Core Clock: 947 MHz Memory Clock: 5000MHz Video Outputs: DVI-I, DVI-D, HDMI and Standard Display Port Maximum Simultaneous Supported Displays: 4