On Mon, 05 Jun 2006 19:41:42 +1000, "Rod.. Whitworth"
<[EMAIL PROTECTED]> wrote:
>There are some very noisy after-market units which a local magazine
>tested on Intel mobos and they were found to be less capable than the
>relatively quiet Intel fan that came with the CPU at no extra
>cost....... To overclockers the roaring sound is their version of the
>roar of a primate declaring his dominance.
Rod is very much correct on this one. If you walk into your local
"consumer electronics" shop (i.e. Fry's), you'll see a plethora of
shiny, polished, chromed, plated and even neon colored crap for sale.
You can be reasonably well guaranteed that if it's pretty, then it's
probably unreliable.
Some Well Known Facts:
* dark colors dissipate heat better than bright colors
* a rough ugly surface dissipates heat better than a polished
shiny or smooth surface
* nearly all forms of metallic plating trap heat
so if it's chromed or otherwise plated avoid it.
* there are very few "bonding paints" which actually transfer
heat from the metal through the paint. All other paints act
like plating which traps heat. If you need to paint a heat
dissipation device, go to the local auto store and get the
ugly, flat black, high temp paint for exhaust systems. It's
as close as you'll get without spending a mint for real
bonding paints.
* there are very few dye processes for aluminum (and alloys)
which have a positive effect on heat transfer. The majority of
the coloring processes used actually reduce heat dissipation.
In other words, the fancy gold or blue colored aluminum heat
sinks usually perform worse than their normal, plain aluminum
counter parts.
* the normal way to evaluate a fan is by the volume of air it
can push. if the air the fan is moving is not removing heat,
then there is little point in having one at all.
jcr
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