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Thread: PSU to strong for the MOBO?




  1. #1
    Join Date
    Nov 2007
    Posts
    22

    Question PSU to strong for the MOBO?

    I've heard that motherboards are only rated for certain power supplies
    and that if you put a strong power supply with to much wattage in the
    wrong motherboard it will fry it.

    I have been searching around the net for information on this
    but all I've found so far are references to the power supply
    unit being to weak and somehow damaging the motherboard
    or other parts.

    For example I'm hoping to put these two parts together without
    reducing the motherboard (Or anything else) into scrap.

    PSU: OCZ Fatal1ty Series 700W Power Supply (OCZ700FTY)
    MOBO: Asus P7H55-M PRO Socket 1156 Intel H55 Chipset (Micro ATX)

    Any truth to this or am I completely misinformed?

  2. #2

    Default Re: PSU to strong for the MOBO?

    Completely misinformed.

    The wattage is regulated by the components. A power supply won't just used 700w because it's rated for that. It uses what you need and nothing more.


    Check out reviews on that exact PSU. I don't know if their game has picked up but I was planning on getting a 750w Fatal1ty model before I went all out and got the Seasonic and I decided against OCZ because of voltage ripple issues with them.
    Last edited by Unframed Obituary; 12-12-2010 at 08:45 AM.
    Silverstone FT02S | ASRock 870 Extreme 3 | AMD Phenom II x6 1055t w/ Prolimatech Megahalems Rev. B | 8gb Corsair XMS3 1333mhz | Powercolor HD 5770 1GB | 250GB Seagate, 500GB Hitachi | Seasonic X-650 | Creative X-Fi Xtreme Audio

  3. #3
    Join Date
    Nov 2007
    Posts
    22

    Default Re: PSU to strong for the MOBO?

    Thanks Unframed Obituary, it's good to know I don't have to worry about
    blowing out my motherboard with a PSU upgrade. :)

    I searched around and I found these reviews of the OCZ Fatal1ty series
    power supplies. I noticed (And I may be reading this wrong...) but it seems the
    700w is very stable while the 550W and 750W suffer a bit of a flux like
    you mentioned.

    OCZ Fatal1ty Series 550W Power Supply:
    OCZ Fatal1ty 550W Power Supply Reviews - OCIA.net

    OCZ Fatal1ty Series 700W Power Supply:
    OCZ Fatal1ty 700w Power Supply Reviews - OCIA.net

    OCZ Fatal1ty Series 750W Power Supply:
    OCZ Fatal1ty 750W Power Supply Reviews - OCIA.net

  4. #4

    Default Re: PSU to strong for the MOBO?

    I was looking at the 750 at the time so that could explain the ripple issue which may very well have been fixed on the 700w model (which didn't exist when I found the reviews speaking of the ripple issues).
    Silverstone FT02S | ASRock 870 Extreme 3 | AMD Phenom II x6 1055t w/ Prolimatech Megahalems Rev. B | 8gb Corsair XMS3 1333mhz | Powercolor HD 5770 1GB | 250GB Seagate, 500GB Hitachi | Seasonic X-650 | Creative X-Fi Xtreme Audio

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