The fanless spinning heatsink: more efficient, and immune to dust and detritus

Re:The fanless spinning heatsink: more efficient, and immune... by sbierwagen on Tuesday July 12, 2011 @04:03PM (#2756283)

I would hesitate twice and then hesitate one more time before placing any confidence at all in a manufacturer supplied number for a statistic like C/W, which can be so easily fudged, as we have seen.

But yeah, I've been out of the overclocking scene for a couple years, now. I have no idea how well heatpipe heatsinks perform, other than "better".

As for the danger of a large piece of metal spinning at kRPM, I agree. This is bad enough that there probably would have to be an safety interlock on computer case access panels that reverses the impeller to a halt when the enclosure is opened.

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Re:The fanless spinning heatsink: more efficient, and immune... by jarek on Tuesday July 12, 2011 @06:25PM (#2756899)

SPCR is a review site pretty serious about their methology; their newest heatsink reviews don't have °C/W figures due to difficulty measuring the power output of socket 1366 CPUs, but here's a mid-2009 review of a huge heatpipe/tower heatsink: http://www.silentpcreview.com/scythe-mugen2

Page 6 states °C/W values of 0.29 down to 0.14 depending on the amount of air pushed with the fans. SPCR's test fans are pretty low-flow to begin with (47 CFM/1080 RPM at 12 V), so you could probably go slightly lower by using real screamers.

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