2x400grit sandpaper
2x800grit sandpaper
2x1200grit sandpaper
2x1500grit sandpaper
1x2000grit sandpaper
a flat surface
some patience and time
This is the original heatsink...
As you can see that it is very rough and not balanced...
Firstly, you use the flat surface to lay your sandpaper so that it wont be the heatsink wont be imbalance.. Start with 400grit you put the heatsink on the sandpaper.. then you push it(don't use force as it may cause the heatsink to have rounded edge) up and down after a few rounds turn the heatsink 180degrees and do it again... repeat until you have a full polished surface... Go either horizontally or vertically to make it easier to see which part of it is not polished... Repeat with ascending grit sandpapers..
Note: Start with 400grit if you have a very rough heatsink surface ... Otherwise you can start with 800 or so...
After 400grit
After 800grit
After 1200grit
After 1500grit
After 2000grit
After I finished polishing with the sandpaper... I used some industrial grade metal polish to make it shine further...
After metal polish
You can do the same to the CPU but start with 1200grit as CPU IHS is made of soft metals...
After polishing CPU(my e6600)
Results of hardwork:
Before polishing(ambient temp 24°C)
After polishing(ambient temp 30.1°C)
As you can see it shove of 2°C of the idle temp and almost 6°C of the load temp...
