CPU Heat Sink Installation

Masking the CPU and adding the goop
Firstly the old factory heat sink was removed, cleaned thoroughly with a citrus based solvent and a blob of Arctic Silver applied. I then masked the edges of the CPU with insulation tape to stop any spillage off the edges coming in contact with the motherboard. As you can see the main heat sink has a length of copper bolted to the edge with another piece of L shaped copper bolted through the heat sink and the copper base. This is to aid heat distribution through the length of the heat sink. Yes, there is a thermal compound between the copper and the sink! The thermal resistances gained through adding further interface materials only gives a 1/r addition. (so it's well worth it). You can see in this picture that the holes drilled in the base are aligned around the motherboard to encourage the air to be drawn through the case.


Align The Copper Spreader
The new sink is moved into position and bolted to the edge of the case via 4 M3 bolts. All the copper surfaces have been lapped with differing grit pieces of wet and dry (upto 1500) which helps reduce resistances. (and makes it look nice and shiney!)
Another View


Add The Second Heat Sink
A second heat sink was then added, it's not actually needed as the main heat sink can easily dissipate the heat required, but i liked the look of it and just-in-case the ambient temp in the room (not the case) ever went over 35 degrees C, this would stop the unit overheating by adding some more capacity. The mountings supplied were 'modified' with a drill to fit the cpu! The screws where then tightened to squeeze everything together.


Close Up Shot!
This is a close up showing the final heat sink assembly. Once it had all been tightened down, I carefully removed the masking insulation tape from around the heat sink, none had escaped!
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