@greg this is also why it only ends up working temporarily in some consoles. if other components (particularly electrolytic caps) are showing their age, they start to have higher impedance, which causes more noise on the power rails and more undershoot during load transients, which can cause the CPU/GPU to glitch out. when you do one of the hot air tricks you de-age the MLCCs, which is just about enough to compensate for the other parts aging, but then that early rapid aging stage kicks back in.