PCB Analysis

Gigabyte has completely redesigned the VRM, which now uses six phases for the GPU and two phases for the memory.


The IR3567B voltage controller handles GPU voltage. It feeds its six PWM phase signals into a combination of an AON6414A MOSFET and two AON6508 AlphaMOSes per phase.


The two-phase memory VRM is powered by a uP1666Q that sends the PWM signal to the same AON6414A / AON6508 set that was used for GPU voltage.


The GDDR5 memory chips are made by Samsung and are marked with K4G80325FB-HC25. They are specified to run at 2000 MHz (8000 MHz GDDR5 effective).


The Radeon RX 580 uses the same Ellesmere GPU as the Radeon RX 480, each transistor is identical. The only difference is in the manufacturing process, which has been refined and now happens at Samsung and Globalfoundries. The transistor count is 5.7 billion and the die size is 232 mm².