When I modified my 660M vBIOS with a voltage of 1.25v and fixed the thermal voltage drop, temperatures were becoming a problem. So I thought it would be good to do a repaste on both GPU and CPU. I went with MX-4 and where the thermal pads were (what was left of them) I spot applied paste in replace; I had surface contact on my heat sink, verified.
Before my temps on the GPU were maxing at 89-92+°C and CPU mid 80's. After the repaste the GPU is maxing at 77°C and CPU at 67°C; The stock paste was literally clay like and crumbled during removal.
It's been a couple weeks since and everything is running cool still but I wasn't yet completely satisfied. In the past I've always done mods to my laptops, particularly the intake mod. I really dislike cooling pads because it's one more thing you have to keep carrying around if you plan on doing any sort of gaming on location.
So this is what I did:
I used a 2 1/8" hole saw (2" if you plan on no o-rings) so that I could utilize the grilles on the inside (flush outside) and secured it with Permatex Ultra Bond (gel type) which then gets covered via rubber o-rings that are cut and glued to appropriate size over the grilles. I centered the holes directly in the middle of the fans.
The tedious parts were the cutting of the grille holders on the backside of the plates (2 per plate that holds in the grilles) you have to avoid cutting off the tabs that hold the plates in place while cutting everything flush to the panel surface. Other than that, pretty self explanatory.
Results? Another 3-5 degrees drop in overall temperatures and temps drop at a much quicker rate than before. So with the repaste and this mod I got roughly a 14 degree drop overall.
Next I'll be painting the fan shrouds black to hide them and painting the fan bearing covers silver.
LINK