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Thread: power supply question

  1. #1
    billdoit2 is offline Junior Member
    Join Date
    Mar 2014

    Default power supply question

    I have someone who wants to sell a Corsair AX750 Modular power supply and from what I can tell it is not Haswell approved. I will be using the Asrock z87 Extreme4 mobo and Intel 4670k. what does it rally mean to have a PU certified.


  2. #2
    profJim's Avatar
    profJim is offline Chief Munchkin + moderator
    Join Date
    Dec 2008
    Tacoma, WA. [USA]

    Default Re: power supply question

    Don't worry, be long as the used AX750 is in good shape.

    Do a web search using: haswell approved psu list
    and one of the first links is Haswell compatibility with Corsair power supplies By Jonny Gerow, on May 09, 2013 12:00 AM

    The Corsair AX750 and AX850 are both made by Seasonic and are based on the 2011 Seasonic X-Series models.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S

  3. #3
    parsec's Avatar
    parsec is offline Senior Member
    Join Date
    Jun 2012
    Third stone from the sun

    Default Re: power supply question

    Also, the fear of non-compatible Haswell PSUs is really blown out of proportion.

    The problem is simply that a Haswell system that only uses the on-CPU graphics (no video card), no other PCI or PCI-E cards, using a SSD as the OS drive with HDDs only as storage drives and set to go into low power mode when not accessed, and no other loads on the 12V rail, will present a load on the 12V rail(s) that is to low for PSU stability. You would also need to have every CPU power saving option enabled, as well as Windows power saving settings in a power plan configured for maximum power savings.

    The "fix" is simply to have a few fans in the PC case connected to the mother board. Like virtually everyone has that builds their own PC. I really wonder about the potential of this issue, since what CPU cooler does not use a 12V fan? I don't think we've seen one thread posted in the TTown forums where the issue was caused by a non-Haswell compatible PSU in a PC.

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