Energy Utilization on Efficient Dual Core

I'm curious if anyone has data on sources of power draws on a typical server
computer. On an AMD single dual core processor system that we start up in
an energy saving mode at 1.8 GHz, we are measuring 350 watts in idle state.
No hard drives are installed. The processor itself is specified to run at
around 95 watts under load, so the additional 250 watts of energy use
surprised me a little. How much of the remaining energy utilization is
going to chipsets and how much is going to fans?
Reply to
Will
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Are you measuring watts or volt-amperes?
Reply to
Don Kelly
How are you measuring the power used?
Servers tend to have many fans. You could have 50+ watts just in fans. The chip set should use around 15-20 (wag). John
Reply to
JohnR66
I'm using a LaCrosse Cost-Control unit whose power page says "Watts". Who knows how they implemented it, but the measurement is taking place between the outlet and the plug going into the server.
I have no idea what the power factor on an HP DL385 G1 server is.
Reply to
Will
And maybe 20 watts per PCI card times 3 would give another 60 watts. So 95 + 50 + 20 + 60 = 225, which still leaves about 125 watts unexplained.
Reply to
Will
Most modern computers utilise PSUs with active power factor correction (APFC) look for "PFC" or "APFC" on the PSU label. If is it then the PF is going to be around 0.9 to 0.95. A standard PC PSU is generally reckoned to be around 0.7, which is pretty bad, when you consider a drop in PF from 1 to 0.9 means a reduction in efficiency of about 15%.
Reply to
Stephen
A reduction in power factor doesn't imply anything about efficiency. They are nothing to do with each other.
Reply to
Andrew Gabriel

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