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Thread: Power Consuption

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    Senior Member Stringent's Avatar
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    Power Consuption

    Any apps that tell me how much wattage is being drawn from my PSU?

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    PMM
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    Nope, there are apps like motherboard monitor that monitor voltages but actual power
    consumption in Watt's cannot be gained without going down a hardware route
    pre the PSU.

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    Prize winning member. rajagra's Avatar
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    Some servers can do that, but yes it involves dedicated hardware within the PSU. Monitoring voltages is probably *more* useful though! Total power can be within limits while still overloading individual voltage lines. MBM is a great little monitoring program that is sadly no longer being worked on but it is still up-to-date for now, and free, so grab it while you can.

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    Apart from dedicated circuitry, the only way to measure that is to use a multimeter and a hacked up kettle plug cable (Run the multimeter, set to read AC amps, in series on the live line of the cable). Of course, this is very dangerous (Injury, death, bad hair, etc.), but once you obtain the amps value, just use the power equation to calculate watts. Google or some clever person here would have to tell you what the equation is, though, because I've forgotten it.

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    Prize winning member. rajagra's Avatar
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    Quote Originally Posted by eldren
    use the power equation to calculate watts.
    P=IxV where P=Power I=current V=Volts
    But this is only true for a given instant. To work out the average power over a period of time, you need the average of (IxV) which is NOT the same as (average I)x(average V).

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    PMM
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    Quote Originally Posted by eldren
    the only way to measure that is to use a multimeter and a hacked up kettle plug cable
    LOL if i had not know better i'd think you had been spying on me

    I did that got a connector block on a lead that I plug my multimeter into,
    resolution is around 2.4watts per measured unit at mains voltages.

    interesting results obtained and noticable overheads depending on PSU in use
    my PCP&C 510 uses 20 odd watts before any computer is even attached.

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    Quote Originally Posted by PMM
    interesting results obtained and noticable overheads depending on PSU in use
    my PCP&C 510 uses 20 odd watts before any computer is even attached.
    Ohh, also a PC P&C 510. Because I'm lazy, how many watts does yours draw whilst running your machine? And, for context, a general indication of your specs please. :>

    On an unrelated note, what happened to your post count? Thought at first you might be a different PMM until I saw the link to pifast.

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    PMM
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    Don't post that often here more viewing than anything, my native home is else where
    tend to drift here when things are quite there

    Not got the PCP&P in use on a PC at the mo, it currently resides in powering a heater
    Core for a Test Dies Simulator in the build thx too its chunky 12v rail only got lappy
    and couple of shuttles in use at the mo.

    But it had powered this.. with ease http://brittech.co.uk/case.htm
    spec need updating XPM2500 in there & corsair XMS4000 max Vcore upto 2.45v

    But if you want me too hook it up to a shuttle for a reading I could do that
    tomorrow ..that's A shuttle with a Vcore mod & Vdimm mod XPM2500 9700Gfx 2*HD + DVD Burner.

    Can run that at over 2v on the Core to bump power up.
    Last edited by PMM; 10-10-2004 at 10:46 PM.

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    Any inkling of how much power it used while it was in operation, though? I'd like to have a general indication of how much is spent on the electricity required to run my machine. :>

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    PMM
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    Don't know TBH my playing with recording power requirements came
    after that rig was pulled apart awaiting new goodies.

    It was powering alot TBH, The Rig was Phase change Cooling + Water Cooling / numerious fans & Cold Cathode UV Tubes + HD's CD Burner plus
    all the Volt mods on earth.

    Not really a reflection of a std rig esp since it ran the xpm at 2850mhz +

    TBH I cannot see the shuttle being too far off

  11. #11
    Senior Member Stringent's Avatar
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    • Stringent's system
      • Motherboard:
      • Intel DQ57TM
      • CPU:
      • Intel i5 760
      • Memory:
      • 8GB
      • Storage:
      • 1TB
      • Graphics card(s):
      • NVIDIA Geforce 260GTX
      • PSU:
      • Corsair HX620
      • Case:
      • Coolermaster Centurion
      • Operating System:
      • Microsoft Windows 7 Ultimate x64
      • Monitor(s):
      • Dual Iiyama 24"
      • Internet:
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    Woah simple question turned into a kinda physics mod lesson! Just wanted to see how much power my shuttle PSU is drawing. 250W, and currently it is:

    SB75G2
    ATI 9800 Pro
    7-in-1 card reader thingie
    Plextor DVD
    SATA Hard Drive
    Some USB devices (mouse, joystick, iPAQ cable)

    Was flashing my iPAQ when the computer reset itself.

    Also wondered what graphics card I could go up to on it. A 6800GT?

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    • BenW's system
      • Motherboard:
      • ASRock Dual SATA2
      • CPU:
      • AMD64 3500+
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      • 1GB Crucial DDR
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    The 9800Pro is meant to have a 300W so i doubt a 6800GT would be very sensible

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    I would say your shuttle system is using about 150W of power on average, probably more when gaming. If you look at reviews of wattage meters used on PC's I was suprised as to how low the power consumption was with the systems they were testing.

    One way of working it out maybe very roughly is to look at the spinny electric meter thing that the electricity man looks at. If you work out the time it takes to make one revolution when the PC is turned on and then turned off you might be able to find the power consumption of your Shuttle. Dunno tho lol

  14. #14
    PMM
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    I'm running 3dmark'05 now it cpu @ 1.98v 2356mhz XPM2500 9700gfx 2*200GB HD's + DVD Burner maxing at 0.98A so I make that 235W peak using the shuttle PSU
    scary thing is its rated to 200Watts Idle = 0.81A =194W.

    5v= 5.16v / 12v = 11.75v

    Going to do a run with the PCP&P...

  15. #15
    Senior Member Stringent's Avatar
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    • Stringent's system
      • Motherboard:
      • Intel DQ57TM
      • CPU:
      • Intel i5 760
      • Memory:
      • 8GB
      • Storage:
      • 1TB
      • Graphics card(s):
      • NVIDIA Geforce 260GTX
      • PSU:
      • Corsair HX620
      • Case:
      • Coolermaster Centurion
      • Operating System:
      • Microsoft Windows 7 Ultimate x64
      • Monitor(s):
      • Dual Iiyama 24"
      • Internet:
      • Patchy
    So whats all this hype then about needing like 550W of power, if actual consumption is pretty low? I'd say the minimum one needs for a system is 350W for the average gamer should suffice!

    Man all this amps is amputaing my brain!

  16. #16
    PMM
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    PCP&C 510 Idle = 0.88A = 211W maxing 1.06 = 264W

    Running Same Spec

    5v = 5.16 / 12v = 12.34 that 5v is suspect that motherboard monitor is saying
    can't believe its identical.

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