Question on Wattage / Kwh calculations (or wattage vs consumption)

Louiscar

victor2 said:

^^This^^

I've just recently had an energy monitor on my PC for a couple of "typical" days, and it used 0.28kWh per day. The average wattage drawn for different periods of use varied from 2.9W when hibernating to 116W when in use. It hibernates so that scheduled jobs will run overnight. I did switch off the USB power when hibernating, but otherwise it runs with the default BIOS setup.

116W seems pretty good .. maybe I should do some tests on my new Ryzen system to see if this actually has better economy than my older rig.

Dimanche_Prochain

victor2 said:

^^This^^

I've just recently had an energy monitor on my PC for a couple of "typical" days, and it used 0.28kWh per day. The average wattage drawn for different periods of use varied from 2.9W when hibernating to 116W when in use. It hibernates so that scheduled jobs will run overnight. I did switch off the USB power when hibernating, but otherwise it runs with the default BIOS setup.

You must not use it very much.

If it's using 116W when in use, that's not far off your 0.28kWh figure after a couple of hours.

But this depends entirely on your PC.  My gaming PC sucks in about 3-400w doing normal desktop tasks, plus another 100w for the monitor..  Start gaming and it'll easily hit 700w, so 800w overall.

I decided to buy a high-end Mini-PC for work use, even at a cost of £700 the payback time won't be particularly long, as even at full pelt it sips energy at about 65w/hr.

Louiscar

[Deleted User] said:

Petriix said:

It's an overall picture. If you can shave 10W off your background usage then that's nearly £50 per year at the October price cap. Obviously higher power appliances (and particularly space/water heating) will save you more, but it all adds up. 

Or to put it another way, turning off 10W for 8 hours a day (which is a lot of time for kitchen lighting) would save you £15 per year.  Spending £50 on bulbs to achieve this is not economical in the short term, you're better off keeping that £50 to pay the bill and changing behaviour somewhere else.

Good to have this in context. I've changed behaviour quite a lot, some of it to do with failing health. In the (less recent) past I was in the habit of turning on the computer and leaving it on. I'd use for quite a few hours a day. Now I'll even hibernate when I go and cook a meal or know I'll leave it for a significant period and I generally don't turn it on till the evening now.

I spend more time in my bed watching stuff on a tablet for a few different reasons but in terms of behaviour it has made a significant difference to my usage.

I am a pensioner and so there is a lot of worry where this situation is going so trying to save everywhere has been on my mind. I even changed my cooker hood bulbs to led which usually at 40w each down to 4w seems significant till you put some context on the situation.

The kitchen is a consideration mainly because this is part of my living room and at night I rely on them to provide light for the room with a small table lamp by my 'puter. Again understanding context is a good thing. :-)

FreeBear

Louiscar said: I am running and 2009 intel Xeon 5760 and I've kept it running for all this time by little upgrades. The clock does drop when there is little use but now the thing is on it's last legs due to amongst other things Win7.

<cough>Debian<cough>

With a Linux system, no need to waste money on buying anti-virus software or being forced to install patches every time Microsoft find another security hole to plug.

Louiscar

FreeBear said:

Louiscar said: I am running and 2009 intel Xeon 5760 and I've kept it running for all this time by little upgrades. The clock does drop when there is little use but now the thing is on it's last legs due to amongst other things Win7.

<cough>Debian<cough>

With a Linux system, no need to waste money on buying anti-virus software or being forced to install patches every time Microsoft find another security hole to plug.

I know I know. Sadly i'm somewhat locked into windows. :-)