On Sat, 24 Jun 2000, Holden Hao wrote:
..
> Hi, All.
>
> How much electricity does a typical PC consume? Most PCs have a 200
> watt power supply but I do not think that the CPU itself consume that
> much. I believe it is the monitor which uses a lot of electricity.
> So without the monitor how many watts does a PC consume? Let's say
> that the typical PC is equipped with something like below:
A monitor does not draw power from the PC's power supply. A typical
17" monitor consumes about 150-200W normally and <50W in powersaving mode.
> 1 pc. 1.44 Floppy
> 1 pc CD-ROM
> 1 pc. sound card (not including amplified speakers)
> 1 pc. Hard drive
>
> I do not want an exact figure but an estimate will do.
The main power consumer on the main board is the processor. A 0.25micron
Celeron @ 533MHz will eat about 20A at 2.0V which is 40W (now you know
where that heat comes from). A Coppermine runs at 1.65V and consumes less
power due to its 0.18micron design. Check the Intel data sheet for power
consumption parameters.
The next biggie is the video card. A Riva TNT/2 or Voodoo3 consumes about
7A at 5V which is 35W. A GeForce would consume more, a typical PCI card
much less.
The hard drive needs about 2.0A at 12V when spinning up, then 0.8A
afterwards, So that's 24W spinning up and <10W steady-state. The CDROM
consumes about the same. Consider your rotating media to consume about 60W
maximum, generally much less.
Everything else (RAM, sound card, main board) is just loose change. A
typical powered 3-piece speaker system such as an Altec Lansing ACS45.1
consumes about 100-120W, but like the monitor, this is not drawn from the
PC power supply.
..
> Does an electric fan set to the lowest speed consume as much
> electricty as a fan set to full-speed? Just curious:)
No. When set at a lower speed less of the coils surrounding the squirrel
cage are energized, so it consumes less current.
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