Results 1 to 8 of 8

Thread: Real power draw of a PC, post your results.

  1. #1
    Join Date
    Jan 2009
    Location
    Grimsby, UK
    Posts
    36
    Thanks Thanks Given 
    1
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Lightbulb Real power draw of a PC, post your results.

    Using a Plug-in Power & Energy Monitor or similar device, lets see your results.

    I used this: http://www.maplin.co.uk/Module.aspx?ModuleNo=38343&doy=27m6D
    __________________________________________________ ___________________
    Gigabyte MA790FXT-UD5P
    AMD Phenom II X4 955 Black Edition clocked at 3.2GHz (1.325v Stock Volts)
    BFG GeForce GTX 295 1792MB (Stock Clock)
    OCZ 2x2GB PC3-1333C7 PlatinumWD VelociRaptor 300GB
    Creative Sound Blaster X-Fi Titanium - Fatal1ty Champion Series
    3 x YATE LOON 120mm Case Fan - D12SL-12
    Ambit Broadband Modem
    40°C idle = 171W

    53°C load = 270W (Using LinX)

    48°C load = 298W (Playing Test Drive Unlimited)

    49°C load = 365W to 375W (Using Street Fighter IV Benchmark)

    50°C load = 360W to 375W (Using Crysis Benchmark)

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    Gigabyte MA790FXT-UD5P
    AMD Phenom II X4 955 Black Edition clocked at 3.8GHz (1.450v Volts)
    BFG GeForce GTX 295 1792MB (Stock Clock)
    OCZ 2x2GB PC3-1333C7 PlatinumWD VelociRaptor 300GB
    Creative Sound Blaster X-Fi Titanium - Fatal1ty Champion Series
    3 x YATE LOON 120mm Case Fan - D12SL-12
    Ambit Broadband Modem
    45°C idle = 205W

    65°C load = 360W (Using LinX)

    58°C load = 350W (Playing Test Drive Unlimited)

    56°C load = 397W to 407W (Using Street Fighter IV Benchmark)

    57°C load = 339W to 412W (Using Crysis Benchmark)


    Seasonic M12D SS-850W Mod PSU
    192W / 221W = 87.9% Efficiency (Cold Load Result)
    355W / 404W = 87.9% Efficiency (Hot Load Result)
    523W / 599W = 87.3% Efficiency (Hot Load Result)

    http://www.jonnyguru.com/modules.php...tory2&reid=127
    i5 2500K @ 4.9GHz MSI Z77 MPower G.Skill Trident 8GB 2400C10
    EVGA GTX 1070 SC 8GB @ 1784/4004MHz Corsair HX 750 PSU
    Samsung 256GB SSD 830 Creative ZxR Thermalright Silver Arrow
    NEC 24WMGX3 24" TFT Fractal Design Define S Canon MP250

  2. #2
    Join Date
    Dec 2007
    Posts
    123
    Thanks Thanks Given 
    1
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    This quote definitely applies here:
    [Basic Power Supply Info]

    Quote Originally Posted by Paul_Johnson View Post
    Yes and a quick search would turn up this topic a million times over. Here is the recap:

    1) APFC can fool Kill-A-Watts into giving you abnormally low readings (some times giving better than 100% efficiency)

    2) Power supplies derate with temperature anywhere from 2w/c above a nominal rated at value to 10w/c.

    3) Kill-A-Watt's and most power meters sample too slowly to catch transient loads (the Transient load from our tests is 117w and is COMPLETELY missed by Kill-A-Watts).

    4) Power supplies last longer if you stay in the 40% to 60% range of their output.

    5) power supplies are quieter if you stay in the 40% to 60% range of their output.

    6) Power supplies are cooler if you stay in the 40% to 60% range of their output.

    The power meters in UPS software are just as bad. You have to spend some change before you get anywhere near an accurate power meter when your PSU has APFC.
    [Kill-A-Watt Inaccuracy]
    Here's Paul Johnson's post about the inaccuracy of the Kill-A-Watt:
    http://hardforum.com/showpost.php?p=...98&postcount=7

    Your Plug-in Power & Energy Monitor is pretty similar to the Kill-A-Watt so the above quotes applies to you too. So in other words: Those numbers may be significantly off.
    (Gaming Rig) - Intel E6400 OC'd @ 3.2Ghz || AC7Pro HSF || GA-965P-DS3 Rev. 1.0 || 4 x 1GB G.Skill DDR2 800 Ram || Maxtor 320GB HDD|| 3 x Seagate 1TB HDD || NEC ND3550A DVD-RW || nVidia 8800GT 512MB PCI-E || Corsair 520HX 520W PSU || Antec P180 || Win XP Pro
    (Server) - Intel Pentium III 866Mhz || 512MB PC133 RAM || 1 x Western Digital 40GB HDD || 2 x Seagate 120GB HDD || Maxtor 320GB & 500GB HDD || Earthwatts 380W PSU || Ubuntu Server Edition

  3. #3
    Join Date
    Jul 2009
    Location
    Germany
    Posts
    3,640
    Thanks Thanks Given 
    6
    Thanks Thanks Received 
    66
    Thanked in
    60 Posts

    Default

    Hm, wouldn't it be enough to put a large coil between the PSU and the powermeter to get almost accurate readings??

  4. #4
    Join Date
    Mar 2007
    Location
    Kenosha, WI
    Posts
    604
    Thanks Thanks Given 
    4
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Inaccuracies aside, I've had a Kill-A-Watt report sustained wattages of over 1000 recently. Was running a Core i7 975 (stock speeds) and two GTX 295 (might have been stock speeds, don't remember). Got 8 threads of Prime95 running a mix of blend and small FFTs (not even large FFTs) and Furmark (etqw.exe so quad SLI works) running stability test (not even "Xtreme Burning Mode").

    I think my server at home measured around 60W on my Seasonic Power Angel (another rebrand of the Kill-A-Watt device). Parts are underclocked/undervolted Pentium Dual Core E5200 (1.2GHz 0.788v) with two HDDs using integrated video.
    Zap
    Clan of the Bloody Fist

  5. #5
    Join Date
    Jul 2009
    Location
    North Carolina
    Posts
    259
    Thanks Thanks Given 
    3
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    7, just 7

  6. #6
    Join Date
    Jan 2009
    Location
    Grimsby, UK
    Posts
    36
    Thanks Thanks Given 
    1
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Well finished my tests now.

    Gigabyte MA790FXT-UD5P
    AMD Phenom II X4 955 Black Edition clocked at 3.2GHz (1.325v Stock Volts)
    Sapphire ATI Radeon HD 4890 Vapor-X 2048MB(Stock Clock)
    OCZ 2x2GB PC3-1333C7 PlatinumWD VelociRaptor 300GB
    Creative Sound Blaster X-Fi Titanium - Fatal1ty Champion Series
    3 x YATE LOON 120mm Case Fan - D12SL-12
    Ambit Broadband Modem
    40°C idle = 192W

    53°C load = 280W (Using LinX)

    48°C load = 275-285W (Playing Test Drive Unlimited)

    49°C load = 304W to 311W (Using Street Fighter IV Benchmark)

    50°C load = 306W to 315W (Using Crysis Benchmark)

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    Gigabyte MA790FXT-UD5P
    AMD Phenom II X4 955 Black Edition clocked at 3.8GHz (1.450v Volts)
    Sapphire ATI Radeon HD 4890 Vapor-X 2048MB (Stock Clock)
    OCZ 2x2GB PC3-1333C7 PlatinumWD VelociRaptor 300GB
    Creative Sound Blaster X-Fi Titanium - Fatal1ty Champion Series
    3 x YATE LOON 120mm Case Fan - D12SL-12
    Ambit Broadband Modem
    45°C idle = 230W

    65°C load = 265W (Using LinX)

    58°C load = 335W to 340W(Playing Test Drive Unlimited)

    56°C load = 347W to 357W (Using Street Fighter IV Benchmark)

    57°C load = 350W to 360W (Using Crysis Benchmark)


    Conclusion

    (-) Sapphire ATI Radeon HD 4890 Vapor-X 2048MB uses 20W more at idle than BFG GeForce GTX 295 1792MB

    (+) Sapphire ATI Radeon HD 4890 Vapor-X 2048MB uses 50W LESS on full load than BFG GeForce GTX 295 1792MB
    i5 2500K @ 4.9GHz MSI Z77 MPower G.Skill Trident 8GB 2400C10
    EVGA GTX 1070 SC 8GB @ 1784/4004MHz Corsair HX 750 PSU
    Samsung 256GB SSD 830 Creative ZxR Thermalright Silver Arrow
    NEC 24WMGX3 24" TFT Fractal Design Define S Canon MP250

  7. #7
    Join Date
    Oct 2006
    Location
    jonnyGURU forums, of course!
    Posts
    16,064
    Thanks Thanks Given 
    538
    Thanks Thanks Received 
    270
    Thanked in
    196 Posts

    Default

    Are you actually interacting with this thread or are you just copying and pasting your results on different forums?

    http://www.xtremesystems.org/forums/...d.php?t=232936

    http://forums.overclockers.co.uk/sho...&postcount=206

    Just wondering because dangman4ever pointed out the well known inaccuracies of Kill-A-Watt-type devices and you didn't seem to acknowledge them.

    Swap that 850W out with a 400W and let's see what happens.

  8. #8
    Join Date
    Jan 2009
    Location
    Grimsby, UK
    Posts
    36
    Thanks Thanks Given 
    1
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    I shall post a few comments on the other forums, alot of people before me on other forums have used the same device thinking it gives an accurate rating, so will let them know.
    Quote Originally Posted by jonnyGURU
    On the consumer level, there really isn't any options to the Kill-A-Watt and other devices like it. And I can't see somone paying hundreds of dollars for equipment just to measure power consumption unless the review power supplies or do something for a living that would require that.

    Some people say adjust for efficiency (80%) and then consider keeping the load within 50 to 75% of whatever PSU's capability. So for example, 300W from the wall, x 80%, 320 WDC... 500W to 550W PSU. But to take into consideration inaccuracy of the Kill-A-Watt and immeasurable transients, I would just suggest double whatever the Kill-A-Watt is reading as a PSU recommendation. So 300W from the wall, 600W PSU. Just to be "safe". You're still not suggesting 1600W PSU's for people with 8800 GT cards (one side of the spectrum) but your not telling people to buy 380W PSU's that will die in a year's time due to stress (other side of the spectrum.)
    Thats what I really needed to know, woudnt of wasted my time with the other graphics card.
    Quote Originally Posted by jonnyGURU View Post
    Just wondering because dangman4ever pointed out the well known inaccuracies of Kill-A-Watt-type devices and you didn't seem to acknowledge them.

    Swap that 850W out with a 400W and let's see what happens.
    Will have to source one, that will give me a more accurate reading then I presume.
    i5 2500K @ 4.9GHz MSI Z77 MPower G.Skill Trident 8GB 2400C10
    EVGA GTX 1070 SC 8GB @ 1784/4004MHz Corsair HX 750 PSU
    Samsung 256GB SSD 830 Creative ZxR Thermalright Silver Arrow
    NEC 24WMGX3 24" TFT Fractal Design Define S Canon MP250

Similar Threads

  1. How to accurately measure PC power draw
    By COFASA in forum PC Power Supply Discussion
    Replies: 43
    Last Post: 01-29-2018, 09:57 AM
  2. Power draw of components
    By Philipus II in forum Testing Methodology Discussion
    Replies: 3
    Last Post: 01-27-2014, 09:57 PM
  3. How much power does RAM draw?
    By opathoris in forum General PC Hardware
    Replies: 2
    Last Post: 01-28-2008, 02:57 AM
  4. SLI Power Consumption Results
    By Jon Gerow in forum PC Power Supply Discussion
    Replies: 65
    Last Post: 12-10-2007, 04:02 PM
  5. Determining power draw on a system?
    By Skyguy in forum PC Power Supply Discussion
    Replies: 3
    Last Post: 07-01-2007, 08:46 PM

Posting Permissions

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