[SATLUG] Home network

Samuel Leon satlug at net153.net
Mon Apr 14 11:33:13 CDT 2008

Jonathan Hull wrote:
>>  I have setup a SOHO because I like the control and I have commercial
>> electric rates.  Remember the P3 probably at least a 300 Watt power supply.
>>  300W X 24Hrs X 30Days / 1000 = the number of KiloWatts used for the month.
>> Multiply that by the $/KW and you get an idea of how much it will cost you
>> to run that server for one month.
> A 300W PSU doesn't run at 300W at all times, so in all likelyhood it
> will be much less than that. A more accurate calculation would include
> using an amp-meter. I got one of those cheap multi-meters with a clamp
> AMP-meter for under $20 on Amazon and use it to gauge how much power
> various computers use. Most of my older PC's (P2/P3) never show more
> than 60W of power when I test them on normal load, even if the PSU is
> listed as 300 or 400W.
> A little tip about how most amp-meters work. For a normal amp-meter it
> has to be wired in-line, which is a pain. I really prefer the clamp
> kind. To use a clamp meter you need to find a extension cord that you
> don't mind cutting the outer rubber insulation off of (don't strip the
> inner wires). Wire whatever you want to test with the hacked up
> extension cord in line and put the clamp around either the hot or
> nuteral (not ground), usually black or white, with the meter set to
> amperage. You can then caluclate the wattage from amerage by deviding
> the voltage (110) by the amperage shown on the meter. Wattage =
> Voltage * Amperage
> Hope that helps. It helped me pick out the best PC from my garage to
> use as a print server.
> -Jon

According to one of these: 
My p2 350mhz and p3 1100mhz boxes both draw about 45 watts each. 
Although the p3 box has the low volt version p3 in it.


More information about the SATLUG mailing list