I've just recently bought a new GPU to replace my old one, and am awaiting its delivery. In the meantime, I've decided to have a look at my PSU, since my new GPU has a higher TDP than my old one.
After spending some time calculating how much power my system would drain, I've determined my PSU might have a hard time delivering sufficient power when my computer is at 100% load. Of course, 100% load in this case includes the power surge needed to power on my computer and is a highly unrealistic scenario. Still, I couldn't help but wonder what would happen, if my PSU simply couldn't keep up with my PC's growing hunger for power, for instance when playing demanding games.
Would my CPU and GPU underclock to reduce their power consumption? Would my PC start behaving weirdly, because the transistors wouldn't have enough power to output a 1 when needed? Or would my PC just shut down entirely?