I would like feedback regarding a coating that I have applied to my CPU heat sink. This coating is designed to increase the convected heat from a metal surface. The coating is advertised to increase heat flux on a metal part by ~30-40% and I wanted to test and see if this was correct.
The test that I did was using a CPU loading program called 'core damage'. I monitored the heat sink temperature using another program called 'speed fan'. I loaded the CPU to 100% for a period of two minutes and took a temperature sample every 10 seconds during this period. I did several of these tests prior to the coating as well as after. The room temperature during all of these tests was 74 deg F. My CPU is the Athlon 6400 duel core and the heat sink/fan is the 'aero cool x-fire 120 mm'.
The coating seems to have decreased the time to reach its thermal steady state to almost half the time and lowered the maximum temperature by ~30 deg F. I think I'm going to do this to a couple more computers to see if I get similar results. To me the results look pretty impressive but I would like to see what others think about it. If there is anything I'm missing as far as creating as accurate results as possible let me know.
Here is a graph I threw together showing the results: