druck  wrote:
> On 07/11/2020 10:32, Chris Green wrote:
> > Cheap to run as well as to buy initially, a Pi consumes a lot less
> > electricity than even a modern 'desktop' machine.  However as the Pi
> > gets bigger and PCs get smaller and more economicial the difference is
> > diminishing.
>
> Slightly diminished, but still substantially better.
>
My desktop, which isn't *that* modern consumes 18 watts "at the power
socket" when doing normal sort of work.  The 4 consumes around 600mA
at 5 volts, that's 3 watts but probably a bit more "at the socket"
because there will be some loss in the power supply.  So the Pi 4
consumes about a quarter of what my (not *very* modern) desktop
consumes.  Give it another generation of each and they'll be nearer.


> > Unless you need the processing power of a Pi 4 then some
> > of the lesser versions maybe somewhat cheaper in the long term.
>
> I don't think the difference between a Pi4B and a 3B or 3B+ is going to
> be noticable, unless you are using a peddle powered dynamo.
>
Well, according to this:-

    https://raspi.tv/2019/how-much-power-does-the-pi4b-use-power-measurements

the 4 consumes something like twice the power of a 2B or 3B.  OK, it's
not a lot and won't cost much (I reckon on about £1/year per watt) but
it is more and *might* be significant if one is using one away from
mains power.

--
Chris Green
·

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