Yeah Jim good comments, I was thinking for my cluster to overclock, which is why i guess some posted the overclocking sentences, and wanted to do it a bit more cheapskate.
Latest idea now was to save costs by using for say a node or 16, to order 16 cpu blocks and 16 small pumps and 2 cheap big reservoirs: Coldreservoir ==> 16 minipumps ==> 16 cpu blocks ==> Hotreservoir Now have a big pump from the hotreservoir to outside, or maybe even 2, and put on the roof a big car radiatior, dirt cheap in fact, and a big fan which works on 24 volts. Maybe even 2. Then pump it back into the coldreservoir (gravity). Guessing i can get at most nodes around a 4.5Ghz or so @ 6 cores gulftown maybe (gulftown is fastest cpu for Diep of course sandy bridge with 6 cores or more as well when at same Ghz, in fact sandy bridge has 4 channels so is a tad faster than the 3 channel gulftown but that's peanuts). Not sure this setup works as i fear pressure differences if the huge pump doesn't pump at the same speed like the 16 small pumps. Anyone? Vincent On Dec 28, 2011, at 7:42 PM, Lux, Jim (337C) wrote: > An SSD wouldn't be a problem. No spinning disks in air, etc. > > And, in general, I'd work real hard to find a better cooling > solution than > oil immersion. It's a mess. > About 5-10 years ago on this list we had some discussions on this > - I was > thinking about a portable cluster for use in the field by > archaeologists, > so it had to be cheap.. No Defense Department weapons system scale > budgets > in the social sciences. And it also had to be rugged and work in wide > temperatures My "use case" was processing electrical resistance > tomography > or ground penetrating radar (generically, iterative inversion) in > Central > American jungle or Middle Eastern deserts. (Where Indiana Jones > goes, so > goes the Lux Field'wulf) > > > If I were building something that had to be sealed, and needed to > get the > heat out to the outer surface (e.g. A minicluster in a box for a dusty > field environment) and I wanted to use inexpensive commodity > components, > what I would think about is some scheme where you have a pump that > sprays > an inert cooling liquid (one of the inexpensive Freons, I think.. Not > necessarily Fluorinert) over the boards. Sort of like a "dry sump" > lubrication system in a racing engine. > > But it would take some serious engineering.. And one might wonder > whether > it would be easier and cheaper just to design for conduction > cooling with > things like wedgelocks to hold the cards in (and provide a thermal > path. > Or do something like package a small airconditioner with the cluster > (although my notional package is "checkable as luggage/carryable on > back > of pack animal or backseat of car, so full sized rack is out of the > question) > > As a production item, I think the wedgelock/conduction cooled > scheme might > be better (and I'd spend some time with some mobos looking at their > thermal properties. A suitable "clamp" scheme for the edges might be > enough, along with existing heatpipe type technologies. > > > On 12/28/11 10:04 AM, "Jonathan Aquilina" <eagles051...@gmail.com> > wrote: > >> On 12/28/2011 11:17 AM, Lux, Jim (337C) wrote: >>> >>> I'm not sure I'd be plunging a disk drive into oil. Most drive >>> cases >>> I've >>> seen have a vent plug. Maybe the holes are small enough so that >>> the oil >>> molecules don't make it through, but air does, but temperature >>> cycling >>> is >>> going to force oil into the case eventually. >> >> Jim would you plunge an SSD in there? So you wouldnt advise using >> mineral oil like the video shows? > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin > Computing > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
