Is it expensive to keep computer running?

How expensive is it on the electricity bill, per week, is it if I keep my computer online 24/7?

Monitor on or off? Whats plugged into the USB ports?

The quick answer is to work it out from the Ah or Watt ratings of all the devices.

I always turn off VDU and speakers and peripherals except my mouse and keyboard.

Yes, I could work it out, but I don't know the price of raw electricity per kWh. Anybody know or have a rough idea?

Originally Posted by Macca371

I always turn off VDU and speakers and peripherals except my mouse and keyboard.

Yes, I could work it out, but I don't know the price of raw electricity per kWh. Anybody know or have a rough idea?

Depends on who you buy it from, how your metered, how you pay

[SOSAGES]

so many variables arrgghhhhhhhhhhhhhhhhhhhhhhhhhhhh

anyway i have my spare pc on 24/7 it has 2 hard drives a 40w psu and its allways up to somthing (emule) and i havnt noticed my self paying much more

40W PSU? with 2 hard drives? I'm surprised it hasn't blown yet

well 40W isnt a great deal. If you assume between 5 and 7p per KWh your not going to be far off.

[bob_a_builder]

Why not get scientific about it

like this

[SMHarman]

P = IV
P=400W V=230
Therefore I=P/V = 400/230 = 1.73A

But thats irrelivant

You buy by the KWhr. You will be using up to 400W so .4 of a Kwhr each hr.

You are likely to use all first tier priced electricity elsewhere in your house.

British Gas second tier electricity is 6.5p KW/hr inc Vat

6.5*.4=2.6p/hr
*24=62.4p day
*7=£4.36 /week
*52=£227/year

However that assumes the PSU is working flat out and you are paying for your electricity cash. Its probably nearer 1/4 of that, say 100W on idle, HDDs not spinning, etc.

So £56 a year

Originally Posted by SMHarman

P = IV
P=400W V=230
Therefore I=P/V = 400/230 = 1.73A

But thats irrelivant

You buy by the KWhr. You will be using up to 400W so .4 of a Kwhr each hr.

You are likely to use all first tier priced electricity elsewhere in your house.

British Gas second tier electricity is 6.5p KW/hr inc Vat

6.5*.4=2.6p/hr
*24=62.4p day
*7=£4.36 /week
*52=£227/year

However that assumes the PSU is working flat out and you are paying for your electricity cash. Its probably nearer 1/4 of that, say 100W on idle, HDDs not spinning, etc.

So £56 a year

huh??? wasnt it a 40W power supply

so on the assumption it is drawing 40W all the time

365*24*40*0.065/1000 = £22.77 per annum. making the same assumption of 25% of full power = £5.69 per annum

Originally Posted by SMHarman

P = IV
P=400W V=230
Therefore I=P/V = 400/230 = 1.73A

But thats irrelivant

You buy by the KWhr. You will be using up to 400W so .4 of a Kwhr each hr.

You are likely to use all first tier priced electricity elsewhere in your house.

British Gas second tier electricity is 6.5p KW/hr inc Vat

6.5*.4=2.6p/hr
*24=62.4p day
*7=£4.36 /week
*52=£227/year

However that assumes the PSU is working flat out and you are paying for your electricity cash. Its probably nearer 1/4 of that, say 100W on idle, HDDs not spinning, etc.

So £56 a year

Thankyou very much.

Originally Posted by gary_580

huh??? wasnt it a 40W power supply

so on the assumption it is drawing 40W all the time

365*24*40*0.065/1000 = £22.77 per annum. making the same assumption of 25% of full power = £5.69 per annum

To be honest, yes, that sounds more realistic.

[SMHarman]

Originally Posted by gary_580

huh??? wasnt it a 40W power supply

so on the assumption it is drawing 40W all the time

365*24*40*0.065/1000 = £22.77 per annum. making the same assumption of 25% of full power = £5.69 per annum

I think the PSU is probably a 400W one not a 40W one (a typo) A standard PSU for a Pentium V is 350W, The one powering my Celeron system is 175W (I think). A laptop draws around 90W, so 40 W would barely run any Motherboard.

[SOSAGES]

my bad i missed a 0 400w

[poolking]

I run my computer 24/7, my bill only went up because npower put their prices up.