CPU=e8400 core 2 duo(not overclocked)
thermal paste=Dynex silver compound
I decided to clean my cpu's heat sink. Before putting it back on, I scraped off the old thermal paste, which came pre-applied, with a plastic card. I cleaned off the cpu die and the heat sink plate with 91% isopropyl and coffee filters(heard they leave very little debris). I have made 2 attempts to reapply new thermal paste(Dynex), and the temperature of my CPU is still far higher than it ever was. Temperatures are:
Idle=55-65 C minimum
Spikes up to 80 C when loading a graphic intensive game
before removing the heat sink to clean it, CPU temp rarely exceeded 55 C even under load.
Attempt 1: Put a dab on the center of the CPU die, and spread it out evenly with a card until entire surface was covered.
Attempt 2: Put a rice grain-sized dab on center of CPU die, but this time just let the Heat Sink spread it out as I affixed it.
Temperatures were equally high after each attempt.
My theories to explain the temperature increase:
1. The paste simply needs time to work in.
-But it has been 2 hours with no improvement whatsoever
2. I caused considerable microscopic damage to the heat sink plate when I scraped off the old paste, which caused too many heat-retaining pits too form.
-But even if the surface of the heat sink was made more irregular, couldn't the paste just seep into all the new pits anyway?
3. The thermal paste just sucks
-Couldn't imagine it sucking more than the pre-applied stuff
4. The Heat sink isn't attached firmly enough
-I got it in there really tightly. Even rotated it 1-2 degrees to supposedly remove air bubbles in the paste.
Cleaning this heat sink out has caused more harm than good! Any insights?