How much electricity?

  Pilch.... 16:43 17 Feb 2003
Locked

do computers use?

my 1700XP, 1gb ram, gf4 and ecs board K7S5A and a 950 with space walker board 256mb.

How much do they use in unit's per day?

  Diemmess 16:53 17 Feb 2003

Depends on how much time is spent on standby, and whether you have a CRT monitor and what size that is.

When all is actually in use, you could be towards 200 - 250 watts..... so a guess would be 4 or 5 hours per unit...... but it is just a guess, and it might be less than that.

First posting failed (errored out) so if this is duplicated you know why

  Pilch.... 17:45 17 Feb 2003

350 ernamax unit and cheap 300 watt PSU

17" Taxan Ergovision 735 TC099 and Dell 15" Trinitron

  woodchip 20:22 17 Feb 2003

If it's not working and the monitor is switched of it's negligible as a PSU in a computer is a switching Transformer it only supplies what is needed as you use the comp the PSU supply Watt's only tell you the maximum you can draw from it without having problems like overheating and puff

  Psiman 20:27 17 Feb 2003

You need to remember depreciation for an high end PC that costs, say £1000 new. Average life 3 years = 91p per day..............:o)

  graham 20:31 17 Feb 2003

Think you will find the 300 watts is the output of the PSU, not the mains power it consumes, which will be a fraction of that!

  graham 20:44 17 Feb 2003

Sorry, reading my post I didn't convey the message very well (not at all, I hear you shout!). 300 watts would be the maximum the PSU could deliver. In practice it shouldn't be running anywhere like or it wouldn't last long and the comp would be very unstable.

  Psiman 20:45 17 Feb 2003

woodchip & graham are correct. Without going into specific kW consumption, the power reqirement for a PC will normally be that of a light bulb. Same again for the monitor (CRT) if its left on.

woodchip, glad to see you spell Watts with a capital 'W'. You must be an engineer.

  Psiman 20:58 17 Feb 2003

sorry, last post should read W not kW, unless Pilch....has a Cray in his garage.

  oresome 21:03 17 Feb 2003

You can't get more Watts out than the PSU consumes! It will use less current at a higher voltage on the input side, but it will amount to the same thing assuming 100% efficiency. The PSU will actually get warm proving it's not 100% efficient...more like 85% at a guess so the consumption will be slightly more than the PSU rating at max.

  oresome 21:05 17 Feb 2003

You can't get more Watts out than the PSU consumes! It will use less current at a higher voltage on the input side, but it will amount to the same thing assuming 100% efficiency. The PSU will actually get warm proving it's not 100% efficient...more like 85% at a guess so the consumption will be slightly more than the PSU rating at max.

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