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Thread: CORSAIR GS800 SUDDEN SURGE AND 12V RAIL 11.4 UNDER BIOS

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    Default CORSAIR GS800 SUDDEN SURGE AND 12V RAIL 11.4 UNDER BIOS

    Hi Guys.

    I recently rma'ed my GPU which was causing the display to go powersave mode or switch off . It litterarly switch off the gpu. Say i can remotely see pc running but the graphics option was disabled.

    Some time it wont even boot and i saw old grainny black and white whole monitor so i did rma'ed .

    Now the new gpu worked fine for 3-4 days and again power saving mode is turned on and i cant see anything.

    Now the pc is also acting weired. It totally shuts off the pc it seems though i see power button led lit


    when the gpu was in RMA for a week . I never had much of hicups or abrupt shutdown restart. for inital 1 or 2 day it was once a day.

    So i was wondering what could be the issue. Many say ram which is not in my case as i recently replaced part of the ram and rest where just 1 year old.

    so i came to know psu could be dying as its 5+ years back when i build this pc.

    So i thought of looking into 12 volt rail to my shock it was 11.3v when in bios.

    I cant imagine when the OS load and game is running.

    Its below the ATX 2.2 spec of +/- fault tolerances.

    so i removed the gpu and thought of running the pc without it. 12v rail gone in OS HWInfo.

    But the BIOS seems to show improved sign of 11.7v even then under almost idle no load its should be close 12v . Only then if loaded it will be within fault tolernace of 11.5V+

    So i definitely my PSU dying . Rest of 3.3 and 5 volt rails were good and no issues.

    Only because of this rail degrading i have to change the psu.

    Is the BIOS reading also could be faulty.

    Also in the non gpu time frame when rma'ed PC ran into shutdown mode when booted manually it says there is power surge deducted. Which i dont see any natural way of happening. As no lightining or rain in my area nor even power fluctions.

    I ran the PC via APC UPS connected via backup and belkin anti power surge.

    Inspite the board also shut down itself deducting power fluctions.


    So it means the 12v is already gone isnt it.

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    The only way to know the voltage is with a multimeter, you can't use software or BIOS. But if you measure a normal voltage with you multimeter it doesn't mean the PSU works as it should.

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    software can be spooky but BIOS cant be

    Also i was alerted twice on Anti surge to protect system board shutdown

    And all these weired shutdown even log says kernal power issue only 41.

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    Is there any way to improve the 12v rail by delivering the orginal or closer performance.

    Which component is causing the degrading voltage .

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    software can be spooky but BIOS cant be
    Incorrect.

    In fact even DMM measurements can show nonsense, if you don't know what you're doing.

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    Software and BIOS get their numbers from the same IC, so the level of spookiness is equal either way.

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    Quote Originally Posted by Dirtymacho View Post
    Also i was alerted twice on Anti surge to protect system board shutdown
    ASUS Anti-Surge is not a reliable tool, it is known to produce a whole lot of false warnings, which makes sense since the voltages measured by the motherboard itself are often incorrect. It rarely protects the PC from anything, if ever.
    Xeon X3440 @3,1GHz + GTX660 + 2x4GB @1650MHz CL9 + Corsair RM650

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    Simple: Borrow another PSU from someone/somewhere and see if the problem goes away. If it does, RMA the PSU.

    There's nothing you can do to "correct" the +12V >>if<< that's the problem and it's actually that low.

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    yes i never have any issue when the gpu is removed from pc.

    Even the PC works fine if high cpu usage like prime95.

    only when gpu is installed i see some weired things like black screen. Artifacts etc all those stuffs

    My psu is more than 5 years old its gs800 corsair. Its no more a series from corsair. Rest of the series exist.

    So even though the maximum load was 500watts all these years. still 12v rail degrade over time.

    its only 3 years warranty. I cant rma it .

    I am wondering that my motherboard is not the issue here.

    I am also rma'ing my 2 very old ram.


    All say power supply could also make ram to malfunction


    At time when i shutdown i see unreferenced memory error.

    I have 4 sticks gskill 1600mhz . 2 of it already new rma'ed . Other 2 1 was 1.5 years old and other was 5 years old.

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    Also one wiered thing happens.

    While shutdown or hibernate. the pc automatically resumes . The hard part it . it doesnt power on at all. Instead the power led keeps flashing with a sound as if breathing light. it turns on and off and keep doing until i do long press to shut it off.

    The only way i can fix it is to twist the 24pin atx power cable. then the pc turns on and for a while i wont have issues. It will not known when this will happen. As long the cable is intact or lossened.

    I tried removing the cable and reinserting it but the problem keep persist.

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