Blake Hudson wrote: > From: m.roth at 5-cent.us >> Nicolas Thierry-Mieg wrote: >>> Colin Coles wrote: >>>> On Friday 01 July 2011 12:05, Timothy Murphy wrote: >>>>> Any advice or suggestions gratefully received. >>>> If you are thinking of the UPS route a caveat: I have several HP >>>> servers and most of them will not work on cheap UPS's as they do not >>>> produce the pure sine wave modern HP machines require but rather a >>>> crude stepped voltage. >>> perhaps naively, I'm surprised: doesn't this mean they put crappy PSUs >>> in those servers? >>> I thought decent PSUs were expected to deal with dirty input AC? >> I agree. Esp. since, other than in datacenters, *most* electric power is >> pretty crappy. > > I would have to disagree. They probably put high efficiency active PFC > power supplies in the servers to save YOU money. You could buy a cheaper > PSU that will not be as efficient and would thus cost you more in > electric costs and create more heat (which would again cost you more in > AC bills and reduce server density). The active PFC supplies are Except that I expect datacenters to have conditioned power, and so they can cheap out with the servers, with the same expectations. And I would expect consumer-grade systems to not have fancy power units, but ones that won't die on power irregularities from the electric co's. <snip> mark