Install Processor+RAM

For RAM, you don't put on anything when applying heat spreaders on them. On CPU, you put a small drop of thermal grease on top of the CPU itself. Don't put too much or it won't be that effective.
 
.. and the grease itself has thermally conductive particles mixed into it. It doesn't conduct heat as well as direct contact, but it's a heck of a lot better than air gaps.
 
The reason why there has to be something between the CPU and heatsink is that the two mating surfaces of processor and heatsink aren't perfectly flat. They may look flat and have a mirror polish. But, on the microscopic scale, they look like a scale model of the Rocky Mountains. And the mountains on one item do not match the valleys on the other. It's like what Marxsoccer was saying.

Without thermal transfer compound, everywhere heat sink metal doesn't mate with CPU package material is a very small, eensy weensey, air gap. Air is a good thermal insulator. As long as your heat sink looks flat when you lay a ruler on it then there'll be a decent amount of actual contact, of course, but the amount of heat that'll actually make it around the air gaps may be surprisingly small which introduces a thermal layer.
 
I know the amd heatsinks come with thermal paste already applied and I know just using that is good if you're not going to overclock it a lot.

The preapplied paste just melts onto the processor when you turn on the computer.
 
Back
Top Bottom