Referencing the above post on undervolting, on Reddit, the discussion seems to be focusing more on just setting total package power limits and instead of letting the CPU run itself to its hard limits, limiting it to the advertised TDP numbers, or even lower. IT seems to pull temperatures back nicely, keeps voltages restrained, and doesn't have near the impact on total performance numbers. The likely culprit is the fact that the processors themselves are constantly trying to maximize their own performance for their given thermal/power envelope. This causes them to pull HIGHER amps when the volts are dialed back. This MAY be taking them out of their targeted internal efficiency curve for power conditioning for each core and causes excessive heat internally as a result. Again, the chips are trying to hit a given wattage target, and, remembering my EE classes, W=V*A. If you reduce the V, but want to maintain the same W, you have to increase the A. If your circuitry is optimized for a particular target voltage, messing with that will make it operate in an inefficient amperage range. That's my theory.