Date: Tue, 30 Dec 2003 10:03:47 +0100 (CET) From: "Per Engelbrecht" <per@xterm.dk> To: <cracauer@cons.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Power consumption in desktop computers Message-ID: <33681.62.242.151.142.1072775027.squirrel@mailbox.wingercom.dk> In-Reply-To: <20031229170255.A87023@cons.org> References: <20031229170255.A87023@cons.org>
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Hi Martin and the rest of you Due to a regulation on watt pr. squaremeter (=heat) in the datacenter we use (InterXion) we have spent a lot of time finding new boards, cpu, psu, ram et al for the servers we use for dedicated serverhosting. All items are measured with different kinds of 'Fluke' volt-meters and on differnt places. Don't know if you folks can use it, buthere goes: CPU (Intel P4 2,4) 63Watt CPU (Intel Celeron 2,2) 54Watt PSU (150Watt with ~70% allocated to 3,3V and 5V) +20-30% on power-on! RAM (Kingston pc2700 512MB) 2,5Watt BOARD (ASUS and DFI onboard LAN, 32MB video, sound) 25Watt DISK (IBM and Seagate ATA133, 40GB) 12Watt CDrom none A complete "server" has a total of: Wake-on-LAN 8watt Idel 42-54watt Max load 92-109watt Beware of the ekstra powerconsumption on power-on! You can expect an ekstra 20-30% on power-on caused by the various circuits on the board, but not least in the PSU. This is only a feature if you work with 16amp feeds (or any other power-feed) and are on the egde of max - then you have to take the ekstra20-30% in account so that you can power all servers up at once, if needed. Best regards /per per@xterm.dk > Tim Kientzle wrote on Sun, Dec 28, 2003 at 11:22:10AM -0800: >> >> Ouch! I've tested a bunch of 'business-grade' desktops around >> my office, and they all run 40-60 watts during normal use (not >> including monitor) with peak power at boot time up to 70-80 >> watts. This includes some P4s with lots of memory, CD-RWs, etc. >> (The one exception is an AMD Duron system; it seems that >> the AMD processors are uniformly power-hungry.) > > I wonder how that works. > > I finally got ahold of a datasheet of P-4 power consumption: > http://support.intel.com/support/processors/pentium4/sb/CS-007999.htm#Table2> > The least hungry P-4 takes 48.9 watts (1.30 GHz), the current > 3.20 and 3.06 GHz models take 82 watts. > > Add the mainboard and the efficiency loss in the power supply. > > Are these business-grade ones maybe equipped with mobile P-4s? > > Martin > -- > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > Martin Cracauer <cracauer@cons.org> > http://www.cons.org/cracauer/ > No warranty. This email is probably produced by one of my cats > stepping on the keys. No, I don't have an infinite number of > cats. > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to > "freebsd-hackers-unsubscribe@freebsd.org"
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