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Corsair TX750 Vs HX1000

Discussion in 'Project Logs' started by Mussels, Nov 20, 2010.

  1. Mussels

    Mussels Moderprator Staff Member

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    This is half project log, half proving some points about power supplies that i see people comment on without any factual knowledge.

    What i'm doing is swapping my PSU from a 750W to a 1000W, and recording the wattages in various tests. I'm expecting a slight wattage decrease especially in the higher wattage tests, not sure how it will vary in the windows idle test.

    I am testing:
    Off
    S3 sleep
    BIOS
    Idle in windows
    Extreme load in windows (synthetic tests)
    Load in games with Vsync on and off

    test done with following settings:
    Monitor NOT included - measuring tower only.

    3.9Ghz 1090TBE @ 1.375v
    Ram @ 1600Mhz 1.65v
    NB + HT @ 2.4GHz (stock volts)
    5870@stock (no OC or voltage adjusts at all)
    1x samsung F1 500GB (OS drive)
    2xmaxtor 250GB in raid 0 (games drive)
    1x optical drive
    ~5 120mm fans (hardly relevant, low wattage fans)

    Test results:
    Off
    750 - 3W
    1000 - 3W

    'Idle' (BIOS)
    750 - 245W
    1000W - 245W - yup, identical

    Idle (Win Desktop)
    750 - 159W
    1000 - 169W (higher - POSSIBLY due to a HDD idling on first PSU test)

    standby (S3 sleep)
    750 - 5W (note how its barely more than when its off)
    1000 - 5W

    Load (OCCT linpack + furmark peak) (this is maximum burn - no game or app will ever get this high, but you should make sure your system can handle it anyway)
    750 - 462W
    1000 - 448W - lower! this PSU's efficiency is in the higher wattages

    and for a repeatable realistic game test...
    Company of heroes, DX9 max: in game benchmark. peak value is recorded.

    Main Menu:
    750 - 202W (Vsync off: 267W)
    1000 - 205W (Vsync off: 272W)

    Benchmark (Vsync on):
    750 - 291W - for about 2 seconds, most was in the 250-260W range
    1000 - 300W for about 1 second, mostly 248W - slightly lower


    Benchmark (Vsync off):
    750 - 339 avg 320
    1000 - 319W - 350W - better and worse at the same time, i call that 'near enough'

    Conclusions from tests
    A few things come to mind here, that arent obvious to most users.

    1. idling in the BIOS consumes a fair bit of power, and outputs a fair amount of heat - almost as much as gaming! BIOS should NOT be considered idle, when watching temps!

    2. Vsync drastically alters the power used, in high end systems. Ever wondered why one game causes you to overheat and crash, but not another? default Vsync settings could be why...

    2.1 When people start contradicting common knowledge about certain cards being extremely hot (cough, fermi), this is probably why. reviewers test with Vsync off, these games having Vsync on will lower the power use and heat output drastically. I saved 40-70W turning Vsync on in CoH, making my temp controlled PSU fan much quieter.

    3. S3 sleep mode is awesome. Barely using more power than a system that is off, yet you can resume whatever you were doing instantly.

    4. The advice not to get an overkill PSU (a 1000W PSU for a 300W PC) is quite solid. you will save power and thus heat, getting a PSU that matches your requirements. Just remember that if you get a multi rail PSU that each rail is sufficient for what you'll have on them (EG, dont get a 700W with four 18A rails if you want to run a fermi - get one with two 35A rails instead)

    4.1 since the HX1000 was a better quality PSU (more efficient design), moving out of its sweetspot is pretty much on par with the 750W anyway.

    5. slightly contradicting above, this 1000W PSU has its fan spin up at a higher load/temperature, so its actually quieter than the 750W, despite using slightly more power. Thats worth considering at least.

    Pictures, since everyone loves pictures!
    just comparing the two PSU's and before/after of the inside of my case. irrelevant to tests.
     
    Last edited: Nov 22, 2010
  2. t_ski

    t_ski Former Staff

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  3. Mussels

    Mussels Moderprator Staff Member

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    all the tests are done for the 750W, and information is given there that may help some people.

    just waiting on the 1000W to arrive now.
     
  4. DrPepper

    DrPepper The Doctor is in the house

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    Do like
     
  5. mlee49

    mlee49

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    What methodology are you implementing? Viewing a killawatt at specific instances?

    Oh and what are you trying to prove/disprove? Or are you doing this just for fun? :)
     
  6. newtekie1

    newtekie1 Semi-Retired Folder

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    Subbed, very interested in the results.
     
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  7. Mussels

    Mussels Moderprator Staff Member

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    mostly for fun and education. using something similar to a killawatt, yes.


    HX1000W has arrived :D
     
    Last edited: Nov 20, 2010
  8. dr emulator (madmax)

    dr emulator (madmax)

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    less waffle more tests :p :laugh: :D


    joking aside what meter are you using to see your usage and such, pics please
     
  9. Mussels

    Mussels Moderprator Staff Member

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    Prodigit 2000MU, pics taken.


    rewiring the whole PC while drinking takes longer than expected!
     
  10. AlienIsGOD

    AlienIsGOD

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  11. Mussels

    Mussels Moderprator Staff Member

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    its now 1am and i have the system working, i'll do the testing tomorrow.
     
  12. dr emulator (madmax)

    dr emulator (madmax)

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    what crack on.gif :D

    btw are you 120 or 220-240 volt and run at 50 or 60 hz ?

    my local maplins store sells or sold them (haven't checked lately)
    was tempted to buy one to run similar tests;)
     
  13. Black Panther

    Black Panther Senior Moderator™ Staff Member

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    Some extremely informative testing here, hope you'll be updating soon.
     
  14. Fourstaff

    Fourstaff Moderator Staff Member

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    People living in down under uses 220-240V and 50Hz, just like the rest of the world less America.
     
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  15. guitarfreaknation

    guitarfreaknation

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    This will probably sound pretty newbish but what is "S3 sleep" and how do I get it.
     
  16. theonedub

    theonedub habe fidem

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    Check your BIOS under power settings to see what yours is set to.
     
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  17. newtekie1

    newtekie1 Semi-Retired Folder

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    Basically, if you tell the computer to go to sleep, or if you have it set to automatically go to sleep after a certain amount of time. Anything in the OS that is refered to as "Sleep" is S3 Sleep.
     
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    Crunching for Team TPU More than 25k PPD
  18. Mussels

    Mussels Moderprator Staff Member

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    ^ that 240v@50Hz here.

    Yeah things just got complicated, had some lady friends stay over the night, so it delayed me :p


    ^ he covered that. Sleep mode or standby has S1 and S3. S1 basically turns off the screen and drives, but leaves the PC on. S3 powers everything but the ram off completely, so the machine can wake up instantly as needed but it consumes very very little power in the meantime.

    Think of what happens when you close the lid on a laptop.
     
    Last edited: Nov 21, 2010
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  19. guitarfreaknation

    guitarfreaknation

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    Thank you gentlemen for that explanation. VERY interesting thread Mussels. :toast:
     
  20. Fatal

    Fatal

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    Sweet thread Mussels as stated I am looking forward to seeing your results :D
     
  21. Mussels

    Mussels Moderprator Staff Member

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    results are in.

    minimal changes exactly as expected between the PSU's
     
  22. Fourstaff

    Fourstaff Moderator Staff Member

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    dr emulator (madmax) says thanks.
  23. Mussels

    Mussels Moderprator Staff Member

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  24. newtekie1

    newtekie1 Semi-Retired Folder

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    I don't agree with that, a Fermi graphics card will work fine on a four 18A rail PSU. You just have to connect the card to more than one rail.
     
    Crunching for Team TPU More than 25k PPD
  25. heky

    heky

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    I think you are both right and wrong at the same time. The most important thing when buying a PSU is quality!, not how the rails are set-up.
     

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