Results 1 to 9 of 9

Thread: PC has been randomly shutting down for a month. Bad PSU? Need advice.

  1. #1
    Join Date
    Aug 2017
    Location
    Peru
    Posts
    8
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Smile PC has been randomly shutting down for a month. Bad PSU? Need advice.

    Greetings everyone,

    My PC has been randomly shutting down for a month. Sometimes I get a BSOD (see attachment), but most of the time I get nothing. AIDA64 shows a very low value for 12v during a stress GPU test (see attachment). So I think my PSU is dying.

    These are my main PC spec:

    Intel Core i7-950
    Asus P6T
    3 Corsair Dominator 2 GB DDR3-1333
    2 NVIDIA GeForce GTX 460 (1 GB) SLI
    SAMSUNG SSD 830 128GB
    SAMSUNG HD103SJ (1 TB, 7200 RPM, SATA-II)
    Corsair Professional Series HX850W PSU

    My PC is 7 years old. I would like to buy a new PSU and test it for a week. If everything is ok I would buy a new GeForce 1060 6GB. If I see a big bottleneck then i will replace other components one by one until am satisfied.

    Am not sure which PSU will be good for the new GPU. In Peru, I only found 500W and lower with bronce certificate and 650W and higher with gold and higher certificactions. I have these options:

    https://www.memorykings.com.pe/subca...tes-accesorios
    http://www2.deltron.com.pe/modulos/p...duct_line=PSCT
    http://integrex.com.pe/shopdisplaypr...entes+de+Poder
    http://www.compuvisionperu.pe/23-fuentes

    From those sites I was thinking of these:
    Seasonic 750 Prime Gold $160
    Seasonic M12II-620 EVO $82

    Thermaltake Toughpower Grand RGB 650W Gold $123
    Thermaltake Toughpower 750W Gold $123
    Thermaltake Smart Pro 650 Bronze $105

    Corsair RM850i Gold $180
    Corsair CX750M Bronze $100
    Corsair CX500 Bronze $72
    Corsair CS650M Gold $113

    EVGA SuperNOVA 850 G2 850W $195

    I saw on SeasonicPeru's facebook a Snow Silent but they don't specify price nor Watts. Worth my attention?

    Any thoughts or recommendations will be really appreciated.
    Attached Images Attached Images
    Last edited by Tequila_Burp; 08-27-2017 at 12:58 AM. Reason: typo

  2. #2
    Join Date
    Oct 2006
    Location
    jonnyGURU forums, of course!
    Posts
    15,500
    Thanks Thanks Given 
    499
    Thanks Thanks Received 
    41
    Thanked in
    33 Posts

    Default

    Can't use AIDA64 to monitor a PSU that doesn't have any kind of voltage monitoring built in.

    The problem probably isn't the PSU. Could be memory.

  3. #3
    Join Date
    Aug 2017
    Location
    Peru
    Posts
    8
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Thanks for the reply. I did a complete memory test with memtest86+ 2 weeks ago. No errors. How many loops should I do to be sure

    edit: Forgot to mention. I am currently with 1 GPU. I swithced GPUs to test. PC shutdown with any of them. However with 2 of them the shutdowns are more frecuently. I will try switching memories to see what happens.

  4. #4
    Join Date
    Oct 2006
    Location
    jonnyGURU forums, of course!
    Posts
    15,500
    Thanks Thanks Given 
    499
    Thanks Thanks Received 
    41
    Thanked in
    33 Posts

    Default

    Try switching memory first. It's the easiest thing to do and most common cause for the problem you're describing.

  5. #5
    Join Date
    Aug 2017
    Location
    Peru
    Posts
    8
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    I put back both GPUs. 2 days has passed, no shutdowns until today. When I tried to power it up immediantly, GPUs nor CPU fan were working. After waiting some minutes, they started working again but there was no video signal. I tried to turn it on switching memories, but didn't work. I had to take off the lithium battery and put it back to make it work again. I replaced lithium battery when the problem started because it was the chepeast thing to do and I read it could cause shutdowns. I'm currently working with 2 of 3 memories to see what happens.

  6. #6
    Join Date
    Oct 2006
    Location
    jonnyGURU forums, of course!
    Posts
    15,500
    Thanks Thanks Given 
    499
    Thanks Thanks Received 
    41
    Thanked in
    33 Posts

    Default

    No. The battery does nothing while the PC is on. Motherboard should work without a battery, in fact. All it does is helps keep BIOS settings on your motherboard while there's no +5VSB coming from the PSU.

    Sounds like a flaky mobo.

  7. #7
    Join Date
    Aug 2017
    Location
    Peru
    Posts
    8
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    Today I forgot to turn off the PC during the night. When I woke up, I moved the mouse and it immediately shutdown (hibernation is disable). Again, when I tried to turn it on, only the fans from the case and drives were on. I let the PC rest for 6 hours and nothing changed. I tried to take off RAM, GPUs and battery but nothing changed. Tried to unplug every cable from the mainboard one by one until I unplugged the motherboard connector. When I replug the motherboard connector the CPU fan started moving. So I put everyhing back to it's place and I finally turned on. I think it's a flaky mobo as you said :/ or probably I'm doing a short somewhere. Could that be a short behavior? I'm doing the last RAM swith just to finish the test

    edit: Some connectors look burn (see attachment). Now am not sure if this was done by de PSU or the MB.
    Attached Images Attached Images
    Last edited by Tequila_Burp; 09-03-2017 at 04:12 AM.

  8. #8
    Join Date
    Jun 2010
    Location
    The Netherlands
    Posts
    5,089
    Thanks Thanks Given 
    367
    Thanks Thanks Received 
    15
    Thanked in
    15 Posts

    Default

    None, high resistance because bad contact or to much current through the two 12V wires.

  9. #9
    Join Date
    Aug 2017
    Location
    Peru
    Posts
    8
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Default

    I will try to find someone to repair 24 pin power connector from PSU and MB. Not sure how this happened. Never manually OC it. Just the default OC like turbo boost and XMP profile. The GPUs are OC by default. I hope this was just
    one-time event.

Similar Threads

  1. Seasonic To Increase Power Supply Prices In United States Next Month
    By awesomegamer919 in forum PC Power Supply Discussion
    Replies: 23
    Last Post: 11-12-2018, 06:29 AM
  2. Seasonic Focus Plus Gold 650W randomly power off in games
    By Sakkura in forum PC Power Supply Discussion
    Replies: 43
    Last Post: 10-30-2018, 05:00 PM
  3. Pc shutting down while playing
    By Willy8484 in forum PC Power Supply Discussion
    Replies: 16
    Last Post: 01-25-2016, 03:03 PM
  4. Computer repeatedly shutting off instantly
    By Praxis1452 in forum General PC Hardware
    Replies: 2
    Last Post: 08-27-2009, 09:18 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •