Mark, if space is not a big deal, why are you even thinking about rack-mount? >
40 nodes is too much. Even if room is spacious, we do not want to mess up with boxes as we did in the past. > > nothing special about Intel twins afaik - AMD twins are comparable. > but it seems even sillier to go with twin systems since you say space is > not tight, and you'd be just creating a hotter hot-spot to cool. > (ultimately, of course, 40 nodes dissipate about the same amount regardless > of formfactor, and you need to find out whether your room > can extract around 40*400W, about 5 tons of cooling. and supply that 16 > kw, of course. I haven't measured many dual-quads yet - the dissipation > might be closer to 300W.) > afaik, their efficiency is maybe 10% better than more routine hardware. > doesn't really change the big picture. and high-eff PSU's are available > in pretty much any form-factor. choosing lower-power processors (and > perhaps > avoiding fbdimms) will probably save more power than perseverating too much > on the PSU... > I checked specs for Supermicro SuperServer 6015TW-INF, it looks very attractive - built-in IB interface. I can see the only objection if two MBs in one 1-U create an additional heat stress inside the unit. If it is not the case, then everything else is irrelevant, because I took care of the good air conditioning and power supply for my new cluster. It also looks like the twins give some money saving.
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