DD RADEON R9 280X 1000M BOOST 3GB D5 2XmDP HDMI 2XDVI. GPU Clock: 850MHz, Boost Clock: 1000MHz, 384 Bit, Memory Clock: 6GHz, Dual Slot Dual Fan, AMD-CrossFire Ready, Displayport 1.2, HDMI 1.4a, Duratec IP5X Dust Free, Duratec Solid Capcitors, Fan Ramping, AMD Eyefinity Technology, AMD HD3D Technology, Double Dissipation Cooling Technology, Ghost Thermal Technology 1.0, PowerTune 1.0.