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Originally Posted by MMZ_TimeLord
I don't quite know about the back block though... most PCBs are multi-layer and are VERY good heat insulators... so the benifit of the back block is suprising. I would have thought that front block would have done a better job. :shrug:
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I was told by many people in the old AMDZone forums (which are now dead and burried
) and in emails from people who read my Overclockers article on the top-side block that the top of MOSFETs have various layers of materials(including an air layer) which end up acting as insulation. So I guess the "level of insulation" is less for the motherboard than the top layers of the MOSFETs.
I guess there's another thing to consider too which is the surface area I am cooling with the back-side block. Compare that to the combined area of each of the little MOSFETs and maybe that has something to do with it too. The back-side block is cooling a much bigger surface area.