Is used to fill between the heat sink and the CPU can not close the gap junction, because of the existence of gaps, so CPU time can lead to a heat sink, so the thermal grease on there, and even painted it in a small amount of CPU , you can improve the CPU cooling effect, but does not benefit too much, otherwise it will be counterproductive.
When species are indifferent, syringes packed CPU on your own after the coating should be uniform, while the square look like cream, you do not need you then own it Tuyun, and only for convenience Bale.
Another said that under the silica gel, silica gel is also a heat conductor, but it will dry up after a very large viscosity, is usually used to stick the card before its heat sink on the GPU, once tainted, it is difficult to repeatedly put down by force expose open, there may be damage to the chip, it is definitely not wipe on the CPU.