That's a completely different thing. I don't want it to be undervolted, I don't want it to draw ''more'' power. That doesn't depend on the voltage it's exposed to, but rather on how much power is required.
You could basically set it to 0 and it would still draw power. Under certain circumstances, the motherboard even has an active power supply of 75 watts, which is guaranteed for the PCIe slot, but it shouldn't actually be on if the power supply from the graphics card is connected externally/directly to the PSU.

For example, I still have 2500+-3000 MHz and 14,000 MHz speeds even with a 400-watt limit.

It's complicated, but I'm pretty sure that for individual tasks, half of the watts simply flow through as a passive flow because the graphics card initializes everything to full power, which can be activated in milliseconds, which is already lacking at this point in terms of what's needed and what's not needed because not everything can work at the same time.

Basically, I only need to activate the CUDAs to complete the requested calculations. This requires almost no power, and the lack of reducing the initialization limit is minimal.


Undervoltage is something completely different, I absolutely lose control.