>> I'm curious to know how you can run a computer (let alone two computers)
>> for less than £60 a year. Let's say it uses 100W (it probably uses more
>> when you're actually using it), and electricity is about 7p per kWh. So,
>> 0.1 * 24 * 365 * 0.07 = £61.32. Where's the flaw in my arithmetic?
>
> I doubt there is nay flaw, but theory do not always work out in
> practice. Most computers use very little power when they are idle.

PCPlus did a test this month using power meters. They found that when idle,
an athlon 64 computer used 132W, while a P4 used 170W.

Shockingly, even when switched off they used 27W and 28W repectively. That
can't be just wol, surely! As would be expected S3 standby mode used only a
little more power. It is a very neat standby mode in my view.