One more story about my xp-m 1600+[25w], I installed an ADDA 8cm 1600 rpm fan over the heatsink, after mess around inside, then I start the computer, about 5 min later, I looked at speedfan temperature, 53 C, it had never been so high, so I shut it off, opened the case, the fan was stopped by wire, if it was Thunderbird or other XP, it would be good bye.