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Circuit Board (PCB) Analysis
The GPU VRM is 15-phase, controlled by three voltage controllers. The Monolithic Power Systems MP2884B supports up to four phases, the MP2886B six phases, and the MP2888B ten phases. I'm not exactly sure why NVIDIA didn't simply use 2x MP2888B instead of three controllers, maybe a three-tiered design helps save power by turning them off more aggressively. The phases marked in red are not for the GPU, but for memory.
As expected, the MP86957 DrMOS chips are made by Monolithic Power Systems, too.
Memory voltage uses a three-phase design and is generated by a UPI uS5650Q. Note the placement of the memory VRM phases—all spread out among the GPU power phases. The reason seems to be improved thermal performance and better voltage stability.
The GDDR6X memory chips are made by Micron and carry the model number D8BGW, which decodes to MT61K256M32JE-19:T. They are specified to run at 1188 MHz (19 Gbps GDDR6X effective).
GDDR6X doubles the data rate once again over GDDR6. It no longer transmits one bit of information by setting the voltage to either "on" or "off", but instead sends two bits of information at the same time by using four different voltage levels.
NVIDIA's GA102 graphics processor is the company's second Ampere architecture chip, the first one targeted at GeForce gamers. It is produced on a 8 nanometer process at Samsung and has a transistor count of 28 billion with a die size of 628 mm².