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mid-2007 iMac power consumption
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Dedicated MacNNer
Join Date: Jun 2003
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Anyone have a meter to measure how much power their new 2GHz 20-inch, 2.4GHz 20-inch, 2.4GHz 24-inch and 2,8GHz 24-inch iMac are consuming?
An AP article's claiming around 75-watts during normal operations and 2-watts while it is asleep.
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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200W (20") to 280W (28") max, about half that in normal operation, and not more than a handful of watts when asleep.
Do you really need the power consumption more accurately than that?
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Dedicated MacNNer
Join Date: Oct 2002
Location: Michigan, USA
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Does anyone really 'need' the minute level of detail that they endlessly come in here and talk about? No, but they want it, and that's why they come ask.
An unusually pointed mduell comment. I'm usually the snarky one.
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Administrator  Join Date: Apr 2001
Location: San Antonio TX USA
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Rudeness will get you nowhere, MichiganRich. I want to know in minute detail so that I can choose the most appropriate UPS for my iMac. That is indeed a very good reason to know at least this level of detail. I'd also like to know specifically how much power it consumes while asleep because I often leave it that way while away from my desk, and I want to know how much power I'm using when not using the computer.
Fortunately it's possible for ANYONE to find out the power consumption ratings (and a lot of other good to know info) about their relatively current Macs here. Apple says the new 20" iMac uses less than 2 watts while asleep with Wake On LAN turned off, and 2.37 watts while asleep with it on (given 115VAC power). The 24" uses 2.35W and 2.65W for the same conditions. Apple shows no separate data for the 2.8GHz Core Duo Extreme version of the 24" iMac. Basically, this means that you can leave the machine asleep and it will use less power (in either the WOL on or off conditio) than a standard incandescent nightlight.
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Glenn -----
OTR/L, MOT, Tx
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Dedicated MacNNer
Join Date: Jun 2003
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ghporter thanks for the link is very useful but I was hoping for data from actual users rather than from Apple Inc.,
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Administrator Join Date: Apr 2001
Location: San Antonio TX USA
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I doubt actual users will have the equipment to measure current draw, or the technical knowledge for how to use that information to determine power usage in watts. I may have a clamp on ammeter around somewhere, but I don't think it's sensitive enough to read the small amount of current an iMac draws, and I'd have to refresh myself on which formula to use to do the power calculations (basic electronics was SO long ago!). As mduell said above, it's likely that the numbers Apple puts out are on the high side.
Do you have a particular application for real data, or is this just curiosity driven?
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Glenn -----
OTR/L, MOT, Tx
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Dedicated MacNNer
Join Date: Jun 2003
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ghporter it's for a our company's desktop computer purchasing proposal. if an iMac can be had at the same price as say Dell with similar specs the power draw would be crucial. i know there's a device that's plugged in between the electrical outlet and the appliance to calculate how many watts it is currently drawing.
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
Status:
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Kill-a-watt... you can get one at any Radio Shack or similar.
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