+ Post New Thread
Results 1 to 8 of 8
Green Computing Thread, Checking Computer Power Status in Technical; Hi All We're having a big push on power usage here and I've been asked to investigate our PC's and ...
  1. #1
    Cache's Avatar
    Join Date
    Apr 2008
    Location
    Cumbria
    Posts
    1,188
    Thank Post
    446
    Thanked 169 Times in 166 Posts
    Blog Entries
    3
    Rep Power
    63

    Checking Computer Power Status

    Hi All

    We're having a big push on power usage here and I've been asked to investigate our PC's and Printers and see if we can reduce it any.

    Probably a stupid question but I haven't got anything to work it out with at the moment, but any rough guidance on how big a power difference is between a PC which has gone to sleep and a PC which is switched off?

    Also, and I can't see how but I'm going to make myself look stupid and ask, is there any easy way to determine whether a PC is switched off or on standby without going round and trying to wake up each individual PC?

    Any help/guidance is appreciated.

  2. #2

    twin--turbo's Avatar
    Join Date
    Jun 2012
    Location
    Carlisle
    Posts
    2,334
    Thank Post
    1
    Thanked 381 Times in 340 Posts
    Rep Power
    150
    Buy one of these and have it in for 1hr of normal use, 1hr sleep, 1hr power off.

    UK Power Meter Energy Monitor Plug-in KWH Electricity Meter UK stock 3-5 days | eBay

    Rob

  3. Thanks to twin--turbo from:

    Cache (18th January 2013)

  4. #3

    twin--turbo's Avatar
    Join Date
    Jun 2012
    Location
    Carlisle
    Posts
    2,334
    Thank Post
    1
    Thanked 381 Times in 340 Posts
    Rep Power
    150
    Sleep can be broken into various ACPI "Sleep" States,

    Look at the "global states"

    Advanced Configuration and Power Interface - Wikipedia, the free encyclopedia

    the main difference is between soft off and mechanical off.

    Rob

  5. #4
    jamesfed's Avatar
    Join Date
    Sep 2009
    Location
    Reading
    Posts
    2,187
    Thank Post
    133
    Thanked 340 Times in 287 Posts
    Rep Power
    84
    I did a blog post about power usage a while back - How much power does a PC use? | my world of IT (video included).

    Found our old Pentium 4s were 100W+ while idle! Newer AMD E-350 PCs with SSDs were just 16-20W.

    Get one of the power meters though - can use it with anything and provides a real view of the impact of power consumption.

  6. Thanks to jamesfed from:

    Cache (18th January 2013)

  7. #5
    Cache's Avatar
    Join Date
    Apr 2008
    Location
    Cumbria
    Posts
    1,188
    Thank Post
    446
    Thanked 169 Times in 166 Posts
    Blog Entries
    3
    Rep Power
    63
    Thanks for the replies, guess I'll have to go arround for a day and just work out what the differences are.

    Your blog post @jamesfed was actually quite interesting though, I might be using it with another push for newer machines.

  8. #6
    jamesfed's Avatar
    Join Date
    Sep 2009
    Location
    Reading
    Posts
    2,187
    Thank Post
    133
    Thanked 340 Times in 287 Posts
    Rep Power
    84
    No problem at all and glad it helped!

  9. #7

    Join Date
    Nov 2012
    Location
    Lancashire
    Posts
    40
    Thank Post
    2
    Thanked 4 Times in 4 Posts
    Rep Power
    4
    Even when a pc is shut down and turned off it will still use standby power, between 1 and 4 watts. Older pc's are worse. I think I think this depends on the motherboard.
    Sleep will normally use about 6 or 7 watts.

    On a side note anyone looking to save power at home. I can recommend this product.
    http://www.amazon.co.uk/dp/B003WK62W...SIN=B003WK62WU
    Last edited by techsup1983; 18th January 2013 at 11:26 PM.

  10. #8

    Join Date
    Apr 2013
    Posts
    1
    Thank Post
    0
    Thanked 1 Time in 1 Post
    Rep Power
    0
    I have found that sleep uses very little power and is almost the same as shutting down or hibernating (but more convenient when turning on again). Switching off at the wall uses less but then you can't use Wake on LAN to start the computers for updates or remote access. It's also a pain unless you have a breaker for the whole ring main in the room.

    Powered on energy consumption varies a lot depending on the hardware (and CPU activity) so you would have to measure this. Either with a plug in meter or with a clamp meter on the whole circuit (but this is less accurate as it only measures current not voltage). You might be interested in this project I knocked up Raspberry Pi Electricity Monitor | UnOp as it can be used for measuring and to teach kids about power consumption.

    As far as monitoring which computers are on, I've recently launched (still in beta) a service to do this at Shutdown Scanner (beta) and it's free to use. You just need to install the probe software on a single machine on the network and it makes nice interactive web-based graphs of when the computers are on in real-time.

  11. Thanks to JSingleton from:

    Danp (24th May 2013)

SHARE:
+ Post New Thread

Similar Threads

  1. Stone Computers power supplies?
    By scfryer in forum Hardware
    Replies: 8
    Last Post: 26th July 2012, 02:03 PM
  2. power status OCX / DLL
    By mac_shinobi in forum Coding
    Replies: 3
    Last Post: 6th October 2009, 03:28 PM
  3. Check the status of your servers
    By FN-GM in forum Scripts
    Replies: 11
    Last Post: 4th March 2008, 01:50 PM
  4. Power User status for all Staff
    By mrforgetful in forum MIS Systems
    Replies: 7
    Last Post: 10th September 2007, 09:12 AM
  5. Checking who logged onto a computer on a given day?
    By alexknight in forum Wireless Networks
    Replies: 7
    Last Post: 15th November 2006, 01:12 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •