Devil R9 390X utilizes 8GB of GDDR5 memory, 2816 stream processors, comes with a core clock speed at 1100MHz, and 1525 MHz -> 6100 effective memory clock speed which is connected via a 512-bit memory interface. The board design has a total of 8 phases (6+1+1). Devil R9 390X 8GB GDDR5 adopts a Hybrid Cooling system. Air Cooling uses a sensor that detects the MOSFET’s temperature automatically and controls the fan speed. The GPU obviously is liquid cooled with the same cooler the Fury X uses.