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Originally Posted by Long Haired Git
because....
If I were Joe, I'd drop to just one shrouded fan @ 4v and see how that goes. Is the competing HSF going to compete on the noise level?
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I don't think it would make much difference.
This unit would respond very much like a heatpipe; it'll maintain a relatively stable C/W, until it reaches its capacity, at which point the C/W curve would look like a bad water cooling block.
The reason I'd like to test it, is because this type of cooling, along with heatpipes, generates radically different response curves. Obviously this unit can be overwhelmed, as any heatpipe can, but we just don't know when. Assessing the response curve for a unit like this is an excellent testing challenge.
Otherwise, as for the functionality, yes it is a disadvantage that one can't add extra cooling points, but if this unit comes out with a low price point, one can simply add another unit. Joe already hinted at a $50 price, and it might not be far off, in the end; it's just a block, a radiator, and special tubing.
As for the orientation issue, I'd have to state that ideally, it should probably be mounted on a diagonal, in case the user flips the case to the side. The problem of course is that it could only be flipped to one side. CPU thermal protection should kick in, in case the user flips it wrongly.
My only issue with this product, to repeat myself, is that it's really, really hard to maintain a vacuum; personally, I wouldn't trust it to not fail.
That aside, it's actually a very compact cooling solution. If Joe can meet that price point and address the reliability issue, this might turn out to be the magical solution that would replace the HSF.