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System is shuting down

hi all
rite i have a new build that i have just completed it has been working fine for a week or so until today! for some reason it just shut down and i had to power it back on.
what could be the cause of this my set up is :

cpu: intel core 2 quad Q6600
memory: g.skill ripjaws ddr3 1333mhz
mainboard: zotac 9300-K-E
graphics: galaxy 9600 gt low profile / low power
power supply: 300 watts

now i have been tould today that it could be the 12v rails on the power supply aint enough could this be the reason as the +12v rail is
9A here is the link to my power supply http://www.directron.com/mfx9300.html

also here are my temps

cpu idle: 50c
chipset: 45c

any suggestions would go a long way thanks for taking your time and reading
5 answers Last reply Best Answer
More about system shuting down
  1. That's a very strange PSU to end up in a home PC. It's designed for servers, and older ones at that. It may be decent, I can't say, but it's certainly not right for your PC at all. Your newer PC needs mostly 12V power. Easily 10 amps, likely more under stress.

    It probably got a little warm, less efficient, and that was enough to trip the protection on it.

    However, 50c at idle is a very poor CPU temp.
    Different programs use different baselines to measure temps. So let's be sure we are on the same page.

    What does this program:
    http://www.cpuid.com/softwares/hwmonitor.html

    Report as the minimum and maximum temps for all 4 of your cores? Go ahead and work the CPU a little bit (with HWMonitor running) so we can see what max temps are.
  2. hi there proximon and thanks for your quick reply

    i know its a strange psu but that was the only one that would fit into my hp pavilion case as i wanted somthing small and difrent :)

    rite lets get to the point i have been runing hw monitor for the last 3 hours and the core readings are:

    min to max

    core #0 38-44c
    core #1 40-45c
    core #2 36-44c
    core #3 37-45c

    and i have a after market 1u full copper heat sink with a dealta fan running at 4200 rpm

    what has been tickling my mind is maybe upgrade the psu fan? think that mite do the trick if i do get a new 40mm fan for the psu i will up grade the cpu fan the same time

    thanks again
  3. Best answer
    OK those temps are happier, and given the smallish cooler they make sense.

    You really need a few more 12V amps there. Capacitor aging will ensure that PSU does not survive long.

    This one would probably fit, can't say for certain.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817104073
  4. thanks for all your help feel more happy now :)

    will invest in a new psu very soon!!!

    it looks all good to fit trough be tould, thank you for hunting down a good psu for me :D
  5. Best answer selected by willzthom.
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