Windows 8 and 8.1 Forums

PSU dying? (Video)

  1. #11


    Posts : 27
    Windows 8.1 Pro X64


    UPDATE:
    Right, I think I've just found the problem, you're not going to believe in this... I'm not sure yet, have to do more testing, but I've just disconnected by NZXT Sentry LX fan controller, and everything just ran smoothly, performed a couple heavyload tests, no more than 50 temp, quite good considering the radiator fans were disabled. One of the (NZXT) temp sensors was not working, and it was probably doing some short circuit. Anyways, the lithium battery (dead for like 3 years) could have caused any problems as well so Ive removed it and I'll fit a new one soon. As the sentry controller comes with 2 spare sensors I replaced the death one, and so far the PC is running stable. I'll perform some more heavy tests and post the results tomorrow, but I reckon the faulty sensor was the problem combined with a faulty PSU (I had to replace the PSU anyway) which have caused both PSUs and MoBo to activate the SC protection and shutdown the machine. BTW, the coil whine keeps coming, however if I disable the idle processor on power settings, the whine is gone.

      My System SpecsSystem Spec

  2. #12


    That sounds like good news to me and even if it wasnt the old psu's fault,you are on the safe side now.
    Keep benching,nice of you reporting your "solution",stick around for updates and mark as solved if all goes well.
    Cheers!
      My System SpecsSystem Spec

  3. #13


    Posts : 27
    Windows 8.1 Pro X64


    Well, everything seems to be going alright now, have played Arma 3 for a few hours with GPU in OC mode, no performance issues, no weird noises, temperatures are OK. I'm going to consider it as solved. Thanks for your help.
      My System SpecsSystem Spec

  4. #14


    Good for you,happy computiing!
      My System SpecsSystem Spec

  5. #15


    Posts : 27
    Windows 8.1 Pro X64


    Unfortunately is not solved. After a few days stable, yesterday evening I was playing Arma 3 with shadowplay recording, first time A3 crashed, then the PC suddenly shuts down. Restarted, after logging on to windows shuts down again. Same old story back. I've disconnected everything, just left 1 RAM stick, CPU, SSD, removed the gtx750 and installed my old gpu on another PCIe slot. So I believe it's not a GPU fault. The electric buzzes are back again, immediately before any shutdown I hear these loud electric buzzes coming from the CPU/North Bridge. I believe that my MoBo is failing. My last try will be powering the water pump using my old PSU (but keep the rest of the machine powered by the new PSU), if my old PSU shuts down, then the water pump PCB is the problem (one of the capacitors is not well welded, but the pump works fine). If the problem still remains and the problem is not on the water pump then something is wrong in the MoBo. BTW, I forgot to mention that sometimes, the GPU has power but there is no display to the monitor, this happens with both GPUs, looks like the PCIe slots are not delivering enough power, If I reseat the GPU it will work.

    I will keep this thread updated later.
      My System SpecsSystem Spec

  6. #16


    Posts : 27
    Windows 8.1 Pro X64


    UPDATE: Just have re-seated CPU, applied new thermal paste, tested CPU using Intel Diagnostic tool, it passed, however if I try it with prime95 it shuts down 2 minutes after +-. I hear strong electric buzzes more and more, the voltage regulators/chokes around the CPU area seem to cause that noise.
      My System SpecsSystem Spec

  7. #17


    Cant seem to find which motherboard you are using,is it a Gigabyte x58?
    Have you tried another wall outlet?
      My System SpecsSystem Spec

  8. #18


    Posts : 27
    Windows 8.1 Pro X64


    Quote Originally Posted by proudtobegreek View Post
    Cant seem to find which motherboard you are using,is it a Gigabyte x58?
    Have you tried another wall outlet?
    GA-EX58-Extreme

    I've tried another outlet, I'm even powering water pump and fans using my old PSU, and the problem is not from there, I often hear a sound like electric shock/sparks on the motherboard coming from the CPU/voltage regulators/capacitors, something is definately shorting the MoBo but not continuously, but what really concerns me is that there is instability, sometimes I can logon onto windows and it just stays there for 1 hour without any problems, if I stress the CPU/RAM using intel diagnostic tool it finishes the test without erros, if I do with prime95 then is shuts 2/3 after start, but it doesn't have a pattern, sometimes I just press the power button on the case and it shuts down 5 seconds later, sometimes it logs onto windows and shuts immediately. It sounds like the voltage regulators are overworking, they are eventually shorting. My next steps to try:

    - Remove DVI cable and try with a VGA spare one, the cable may be shorting.
    - Remove motherboard and search for any conductive material there and check capacitors.
    - Change SATA cables
      My System SpecsSystem Spec

  9. #19


    Was more than a wild guess,that you own a Gigabyte x58!Did a bit of search under the terms "electric buzzes motherboard" and most of them were referring to that specific mobo.
      My System SpecsSystem Spec

  10. #20


    Posts : 27
    Windows 8.1 Pro X64


    Update: Steps I've done so far:

    - Swapped DVI cable by VGA cable (no changes, it shuts down anyway)
    - Changed SATA cables (no changes, it shuts down anyway)

    Last step:
    - Remove MoBo and search thoroughly for any blown capacitor, short circuit on the back and clean it very well.
      My System SpecsSystem Spec

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PSU dying? (Video)
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