Custom Built PC keeps turning off

Hi all,

I recently just purchased and built my first PC (spec. can be viewed here - http://gyazo.com/bfd7814069c25a86abc57d5b6ab0b1c8 )

The issue is that the PC seems to run absolutely fine for around 30-45 minutes but then shuts off. It doesn't appear to be a CPU issue since the temperatures are fine throughout the use of the machine (idles around 30 degrees Celsius), I am also able to turn the PC back on straight away without any issue except sometimes I need to remove the front power connector and place it back in and then it boots up fine.

I'm unsure as to what the root cause of the issue is but any help would be much appreciated, thanks.
12 answers Last reply
More about custom built turning
  1. Can you try a different and better quality PSU? Your PSU isn't a crappy unit, but you should read the whole review: http://www.hardwaresecrets.com/article/Cooler-Master-eXtreme-Power-Plus-500-W-Power-Supply-Review/728/1
  2. star your system without the front switch just temporary touching the 2 pins with a flat screw driver to start the system and see how long it will stay on .
  3. Are you overclocking?
  4. GhislainG said:
    Can you try a different and better quality PSU? Your PSU isn't a crappy unit, but you should read the whole review: http://www.hardwaresecrets.com/article/Cooler-Master-eXtreme-Power-Plus-500-W-Power-Supply-Review/728/1


    Yes, already tried another PSU and same result as with the original power supply.
  5. joe_newbuilder said:
    Are you overclocking?


    No, Not really fussed about overclocking at the moment.
  6. scout_03 said:
    star your system without the front switch just temporary touching the 2 pins with a flat screw driver to start the system and see how long it will stay on .


    Tried this the other day and it still gave the same result. System will run for around 30-45 minutes but then shuts off. I'm really confused as to what is causing it :/
  7. since you write that cpu stay around 30 at idle what is the temp on load for the cpu and gpu also check if your fan are spinning on both of them .
  8. TheMLDrake said:
    No, Not really fussed about overclocking at the moment.

    Try pulling the cmos battery in the MB and see if it still happens..

    there are many ways that this can happen. you can break the problem into systems

    1 PSU
    2 MB/cpu
    3 OS
    4 Physical short.
    5 Temp
    (6) broken part ram, video card,etc
    You seem to have ruled out 5
    I think that if it was a short 4, it would be more random

    so it can be
    1 PSU
    2 MB/cpu
    3 OS - not likely to be the os

    Does this happen if you leave it on and do nothing with it?
  9. Sounds like maybe CPU or MOBO overheating, if you've ruled out the PSU.

    Make sure all of your cables are fully seated...

    Also could be a bad GPU if it shuts off while going into more intensive use there.
  10. scout_03 said:
    since you write that cpu stay around 30 at idle what is the temp on load for the cpu and gpu also check if your fan are spinning on both of them .


    Tested the machine with Prime95 and left running for about 20mins yesterday (manually closed it after that time), max temp reached by the CPU was around 70 degrees Celsius in that time. As for the GPU it idles around 40 degrees Celsius and on load goes up to high 50's / low 60's and yes the fans are running on both the CPU and GPU at around 1300-1400 RPM.
  11. joe_newbuilder said:
    Try pulling the cmos battery in the MB and see if it still happens..

    there are many ways that this can happen. you can break the problem into systems

    1 PSU
    2 MB/cpu
    3 OS
    4 Physical short.
    5 Temp
    (6) broken part ram, video card,etc
    You seem to have ruled out 5
    I think that if it was a short 4, it would be more random

    so it can be
    1 PSU
    2 MB/cpu
    3 OS - not likely to be the os

    Does this happen if you leave it on and do nothing with it?


    Yes, if I leave the machine idle it shuts off after a similar amount of time. Trying the CMOS way now.
  12. does this motherboard have the onboard video chipset so i would remove the graphic card and see the time system would stay on .
Ask a new question

Read More

New Build Systems