true power consumption (was: disadvantages of linux cluster)

alvin at Maggie.Linux-Consulting.com alvin at Maggie.Linux-Consulting.com
Fri Nov 8 17:45:49 EST 2002


hi ya

more cpu power dissipation and other specs
	http://users.erols.com/chare/elec.htm
	http://www.heatsink-guide.com/maxtemp.htm
	http://www.Linux-1U.net/CPU/

c ya
alvin

On Fri, 8 Nov 2002, Dave Lane wrote:

...

> I haven't been doing the same thing here over the last two days and you 
> have to be very careful when interpreting these measurements. Most meters 
> assume that the waveform is sinusoidal and use this fact to guess what 
> "RMS" current reading to display on the meter. Switching power supplies 
> have nothing like a sinusoidal current waveform.
> 
> I have been measuring the supply current (120V) for an Athlon XP1700 PC 
> running Linux (MSI KT266A MB, 20G drive, CD, floppy, KB, Mach64 video). For 
> cpu loading I'm using the setiathome cmdline version). The measurement 
> technique is inline (I made a custom cable to do this) with both normal 
> (Fluke 73UIII) and true-rms (Fluke 79III) multimeters.
> 
>                  Unloaded (A)    Loaded (A)      Unloaded (W)    Loaded 
> (W)
> Normal          0.65A           0.74A           78W             88.8W
> True RMS        1.13A           1.3A            135W            156W
> 

_______________________________________________
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf



More information about the Beowulf mailing list