How much does it cost to leave a computer running 24/7?

Cianos

Hey,
Just wondering what the cost is in electricity to leave a computer running all the time? So that the computer itself would be on 24/7, and a big 19" monitor (one of the old types, not flat panel) would be on about half the day?

Thanks!

ntlbell

get the "wattage"

multiply it by 24 x 30 convert to kwh

check bill for kwh price

multiplu the total amount of kwh by the price

and you should be there or there abouts

:D

Dartz

Depends on how much Power it uses. The Wattage rating of the PSU will give you a good idea of the maximum it'll draw. 90 Watt Laptop power brick will draw 90W at maximum load...about the same as a lightbulb..... and infact, a good deal less than this under normal circumstances, especially if you're not charging the battery or loading the CPU/GPU constantly.

Cianos

I don't know what the kwh is unfortunately, don't really have access to the bills. I work sometimes in a non-profit living project here in Berlin and they are leaving a computer running all the time so was just wondering what it's costing them to do that, roughly.

Is it really as cheap as a lightbulb to leave a computer on all the time? Thought it would have been way more what with the fan, the monitor etc.

Shiny

Cianos wrote: »

I don't know what the kwh is unfortunately, don't really have access to the bills. I work sometimes in a non-profit living project here in Berlin and they are leaving a computer running all the time so was just wondering what it's costing them to do that, roughly.

Is it really as cheap as a lightbulb to leave a computer on all the time? Thought it would have been way more what with the fan, the monitor etc.

It would cost a little more than a lightbulb. Most likely around what it would
cost to keep 2 100Watt bulbs going 24/7.

Depending on how old the computer is, it probably consumes less.

It works out at around €20 per month based on Irish prices.

Capt'n Midnight

get a power meter to measure it properly roughly

if 100W
100W = 1 unit every 10 hours = about 20 c
168 hours per week so about €3 per week /. €150 pa

or if a laptop see how long it lasts on the battery and work back eg:
12 V battery 4Ah = 48 watthours - so if it lasts one hour then 48 watts
laptop adaptors are designed to power the laptop AND charge the battery at the same time

most PC's would run at a fraction of their power supply wattage when they are idle, aggressive power saving on cpu speed and turning off the hdd would also help

fans mean the pc is using lots of power, some fans can be up to 25W them selves !

10-10-20

I've generally found that the average for desktops is <150W.
So, for example, a 150W system would use 1kW (one ESB unit) in 6.6 hours.
If it uses power saving for the LCD and such, you can trim that by 20w, and another 5 if the hard-drive powers down also.

Laptops use anything from 40W to 70W.

JJJJNR

if a single “Green” PC (180watt PSU) was left on constantly over 365 days this PC would still consume 1581.12 Kwh of energy and cost Eur287.82 per year to run. If the same PC was only in operation for the standard 37.5 hrs working week it is estimated that the cost per year to run the same PC would be Eur64.26.

Check out www.1e.com for some more information.