Originally Posted by Alastair
No what he means is take the chip out. And flatten and polish the IHS.
A lot of CPU's are either shipped with a convex or concave heatspreader. Both often make for less than ideal contact to the cooling device of choice. So what you do is you start with a low grit of sandpaper. Say 800 or so. Stick it onto a perfectly flat surface. Say a glass table and run your cpu up and down the sand paper. Do a couple of sweeps then rotate 90 degrees. Repeat until you have sanded down to the copper of the heatspreader. Then go for higher grit paper. Like 1200 then repeat. Rinse and repeat this process til you get to about 2500 grit and then you have a lapped processor.
Just a couple things to point out.
1. Be careful when rinsing the CPU. I have seen unglued areas on my 8320E that became water entries to the innards of the chip. Make sure to dry it sooo well.
2. 2000 Grit or over is unnecessary to achieve a polished surface. 1000 Grit + Polishing Cream does it better and quicker.
Originally Posted by hurricane28
Its like this: http://forums.anandtech.com/showthread.php?t=2300800
first make sure you apply the TIM properly, because you can have such an flat heat sink and CPU surface but if you apply TIM the wrong way you will never see any gain in temps.
What you want is clean the CPU and the heat sink with a cloth and alcohol than apply a little pea size amount of TIM in the middle of your CPU, than mount the cooler on the CPU and let the heat spreader do the rest.
Make sure you have some smooth newer TIM because older TIM can be tricky to spread and in some cases some spreading is necessary but in most cases its not.
Try this first. If it doesn't help, take out the CPU and check for flatness.
Originally Posted by snipekill2445
I remember reading somewhere that actually physically spreading the paste to a thin layer on the IHS is better than the regular pea dot or rice grain method
Pea or line or spread method will not introduce large differences. Especially on water cooling. But is always good to try out which performs best on any system. TIM is not that expensive for trials. And each method will be tested first hand rather than perceived by the usual, "I heard" "I read somewhere" or "linus say" this method is best.