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I think your calculation should be close if not right on. The formula I could find was explained at http://www.kilowattclassroom.com/Archive/PWR.pdf I am assuming that fi in your formula is phase angle. If power is single phase you can assume a phase angel of zero. Thus, P = 230V x .15A x 1 = 34.5W. With either a phase angle of zero or what ever you used, you should be consuming less than 40 Watts of power. The only question I have on your calculation is the amperage - drawing .15A? 110 - 150 Watts is probably based on an active machine with monitor and some hard disk activity. Monitor alone could draw 70W or more (my CTX 15" monitor - 95W). My Intel Pro100+ NIC's docs state that the power requirement is 1.06W at 5 VDC. The docs for a Seagate ST320014A hard disk state a max power draw of 6W during seek and 4.5 for an idle. With my 15" monitor, 2 NIC's and an idle HD I should be drawing over 100W. This would not include that little heater called a CPU. I could not find specs on the Celeron 333, but the 1.4 GHz should draw 34.5 W (see: ftp://download.intel.com/design/celeron/datashts/29859604.pdf). If power consumption is an issue, Soekris boards only draw 10 to 15W. _________________________________ James W. McKeand -----Original Message----- From: Peter Parnican [mailto:peter at procad dot sk] Sent: Thursday, October 21, 2004 1:22 PM To: M0n0wall Subject: [m0n0wall] Saving energy Hi everybody, this is not realy technical "problem" question. Im using PC (celeron 333, 64MB, 20GB, 2xNIC) ...none monitor, keybord, mouse. So, im measuring the current which use my PC (230V / 0.15A). ...so it should be P=U * I * cos (fi) = 230 * 0.15 * 0.76 = 26.2 W. ...I read that average consumption for PC is 110 - 150 W (max. 3 PCI cards). That is quite big differences 26W to 110W. ..Is my calculation OK ? (m0n0 will work on my friend roof, so i want pay him all expenses for energy) peter --------------------------------------------------------------------- To unsubscribe, e-mail: m0n0wall dash unsubscribe at lists dot m0n0 dot ch For additional commands, e-mail: m0n0wall dash help at lists dot m0n0 dot ch |