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Originally Posted by TerraMex
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Those are nice little blocks, but they are only going to work on a specific
motherboard that has the FET's positioned in the same geometry as the
waterblock surfaces. From what I've seen, no two mobo's are alike in the CPU
power department. I'd still go for the large area back of the Mobo cooling idea.
I've picked up and looked at a lot of boards at Fry's, almost every one of them
is nice and flat on the back under the CPU power supply. Cap and inductor leads
and scattered 0603 sized caps are the only exceptions. So a nice silpad should
take up the gap and with enough area you should get 20W of heat transfer.
Even at 1Degc/W you are removing heat.
But this is all for a WC purist, gluing a small chunk of heatsink to each FET
and putting an 80mm fan at 7v will do just as good of a job and not add much
noise at all. The wound core inductors have tons of surface area and really
are quite efficient compared to the square surface mount inductors that can
be heatsinked.
Bottom line, dont ignore the CPU supply, it's designed for a fan cooled CPU
, when you watercool, you remove a lot of the local airflow and that supply can overheat, especially when you overclock.