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How Much Electricity Does A Computer Use Per Hour?


sharky's Avatar
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Join Date: Jul 2001
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10-Jul-2005, 06:57 AM #1
How Much Electricity Does A Computer Use Per Hour?
HOW MUCH ELECTRICITY DOES A COMPUTER USE PER HOUR? Arguement going on a home on high electric bills,anyone have a rough idea how much electricity a computer(pen4) uses? i thought i read somewhere about 25 cents an hour
wtxcowboy's Avatar
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Location: Denver City, Texas
10-Jul-2005, 08:40 AM #2
if ur pc has a 300w power supply, it's like leaving 3 100w bulbs on all the time
winbob's Avatar
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10-Jul-2005, 12:01 PM #3
Originally Posted by wtxcowboy
if ur pc has a 300w power supply, it's like leaving 3 100w bulbs on all the time

That is, at the maximum. The unit does not draw the PS's max rating unless the demand is there.

If you have an older CRT display, it probably uses more power than the PC itself. So compromise and shut it off when not in use.

As for the Co$t, that will depend on the price per KW Hour in your area, check your bill. If you were using 333Watts, that would be 1/3 KWH.
JohnWill's Avatar
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10-Jul-2005, 01:28 PM #4
winbob is correct, it's unlikely to be drawing 300 watts, or anything close. OTOH, I've checked the power consumption of this P4-3.2ghz machine with three hard disks, two optical drives, and two 19" LCD monitors attached. The whole shooting match is drawing 220 watts when active, and around 100 when the monitors go into standby and the disks spin down. Unfortunately, the true RMS wattmeter wasn't mine, and it's gone home with it's owner, so I can't do any more tests.
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