Thanks for the quick responses.
So what you're saying is that the difference between "F" and "D" is negligible, and decreasing core voltage will significantly decrease the PCI-E slot power draw.Originally Posted by The Stilt
Increasing the value will direct more load toward the PCI-E connector, but the difference between 0xB and 0xF is extremely minor and AMD is already using 0xD in the 16.7.1 driver. Lowering the GPU power draw will definitely lower the power draw from the bus, but not by the same amount as the total consumption decreases (due VRM being split 50/50). So if you manage to decrease the GPU power draw by 10W, with "F" programming value you should see around 6W decrease in power draw from the PCI-E slot (5W at stock settings, i.e with "0" programming value).
The memory VRM is fed only from the PCI-E power connector, so the memory clocks don't affect the power draw from the PCI-E slot significantly (most likely the difference is measured in mW).