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Thread: motherboard frying psu

  1. #1
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    • ekamdeep's system
      • Motherboard:
      • gigabyte h61
      • CPU:
      • i7 2600
      • Memory:
      • 8 gb gskill 1600
      • Storage:
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      • Graphics card(s):
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      • PSU:
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    motherboard frying psu

    so i have i7 920 on asus x58d premium gtx560 thermaltake 700watt thoughpower
    last when i turned it on it ran fine for 5 minutes then when i played a game for 5 seconds it turned off
    i tried power button
    removed everything then installed it back no use
    today i installed my friends psu a 500watt
    same case ran fine but when i opened game it died
    not both psu won't turn on even with shorting the wires on 20-24 pin cable
    now i have 2 dead psu lying (one which i will have to paay my friend)

    please help ?????

  2. #2
    Admin team peterb's Avatar
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    Re: motherboard frying psu

    What make are the PSUs?

    My suspicion would be that you have overloaded the PSUs and either blown an internal fuse if one is fitted or an internal component if one is not. High end PSUs usually have some form of electronic overload protection that reduces the risk of overload damage.
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  3. #3
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    • ekamdeep's system
      • Motherboard:
      • gigabyte h61
      • CPU:
      • i7 2600
      • Memory:
      • 8 gb gskill 1600
      • Storage:
      • 1 tb western digital
      • Graphics card(s):
      • r9 290 reference
      • PSU:
      • 1200 watt ax corsair
      • Case:
      • haf 932
      • Operating System:
      • win 7 64
      • Monitor(s):
      • 17 inch dell
      • Internet:
      • shaw 25 mbit/s

    Re: motherboard frying psu

    thermaltake
    and corsair

  4. #4
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    • ekamdeep's system
      • Motherboard:
      • gigabyte h61
      • CPU:
      • i7 2600
      • Memory:
      • 8 gb gskill 1600
      • Storage:
      • 1 tb western digital
      • Graphics card(s):
      • r9 290 reference
      • PSU:
      • 1200 watt ax corsair
      • Case:
      • haf 932
      • Operating System:
      • win 7 64
      • Monitor(s):
      • 17 inch dell
      • Internet:
      • shaw 25 mbit/s

    Re: motherboard frying psu

    if i shot the blue and green wire on psu it turn on but not with shorting green wire with black

  5. #5
    Admin team peterb's Avatar
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    • peterb's system
      • Motherboard:
      • Nascom 2
      • CPU:
      • Z80B
      • Memory:
      • 48K 8 bit memory on separate card
      • Storage:
      • Audio cassette tape - home built 5.25" floppy drive
      • Graphics card(s):
      • text output (composite video)
      • PSU:
      • Home built
      • Case:
      • Home built
      • Operating System:
      • Nas-sys
      • Monitor(s):
      • 12" monocrome composite video input
      • Internet:
      • No networking capability on this machine

    Re: motherboard frying psu

    Both PSUs should be able to cope with overload OK.

    This is the pinout for the ATX standard - better to go by pin numbers than wire colours

    http://pcsupport.about.com/od/inside...in-12v-psu.htm

    I am tending to think that there is a fault on the motherboard or the GPU.
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    • ekamdeep's system
      • Motherboard:
      • gigabyte h61
      • CPU:
      • i7 2600
      • Memory:
      • 8 gb gskill 1600
      • Storage:
      • 1 tb western digital
      • Graphics card(s):
      • r9 290 reference
      • PSU:
      • 1200 watt ax corsair
      • Case:
      • haf 932
      • Operating System:
      • win 7 64
      • Monitor(s):
      • 17 inch dell
      • Internet:
      • shaw 25 mbit/s

    Re: motherboard frying psu

    16 with 14 pin powers on supply
    but shorting 16 with gnd does not power on supply which earlier did power on

  7. #7
    Admin team peterb's Avatar
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    • peterb's system
      • Motherboard:
      • Nascom 2
      • CPU:
      • Z80B
      • Memory:
      • 48K 8 bit memory on separate card
      • Storage:
      • Audio cassette tape - home built 5.25" floppy drive
      • Graphics card(s):
      • text output (composite video)
      • PSU:
      • Home built
      • Case:
      • Home built
      • Operating System:
      • Nas-sys
      • Monitor(s):
      • 12" monocrome composite video input
      • Internet:
      • No networking capability on this machine

    Re: motherboard frying psu

    Is that the same on both PSUs?
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  8. #8
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    • ekamdeep's system
      • Motherboard:
      • gigabyte h61
      • CPU:
      • i7 2600
      • Memory:
      • 8 gb gskill 1600
      • Storage:
      • 1 tb western digital
      • Graphics card(s):
      • r9 290 reference
      • PSU:
      • 1200 watt ax corsair
      • Case:
      • haf 932
      • Operating System:
      • win 7 64
      • Monitor(s):
      • 17 inch dell
      • Internet:
      • shaw 25 mbit/s

    Re: motherboard frying psu

    yes.........................

  9. #9
    Admin team peterb's Avatar
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    • peterb's system
      • Motherboard:
      • Nascom 2
      • CPU:
      • Z80B
      • Memory:
      • 48K 8 bit memory on separate card
      • Storage:
      • Audio cassette tape - home built 5.25" floppy drive
      • Graphics card(s):
      • text output (composite video)
      • PSU:
      • Home built
      • Case:
      • Home built
      • Operating System:
      • Nas-sys
      • Monitor(s):
      • 12" monocrome composite video input
      • Internet:
      • No networking capability on this machine

    Re: motherboard frying psu

    Then if you are absolutely certain about the pins you are connecting together, (and you haven't mis counted or mis-identified the pins) hen the probability is that either the CPU and/or the motherboard and/or the GPU has failed catastrophically and has caused damage to the PSU's.

    Without examining components and carrying out other more complex tests it is almost impossible to determine how or exactly what. The standard basic fault finding technique is to strip the system down and test it with minimal components plugged in - but to do that you would need another PSU, and on the basis of what has happened so far, I think you run a real risk of damaging that.
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    • big_hairy_rob's system
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    Re: motherboard frying psu

    If the system just turns off - my money would also be GPU. I've had this happen too many times, but it sounds like it's going wrong when things get hot, and a problem with overheating on one of the GPU's is more likely. Try each individually.

  11. #11
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    • ekamdeep's system
      • Motherboard:
      • gigabyte h61
      • CPU:
      • i7 2600
      • Memory:
      • 8 gb gskill 1600
      • Storage:
      • 1 tb western digital
      • Graphics card(s):
      • r9 290 reference
      • PSU:
      • 1200 watt ax corsair
      • Case:
      • haf 932
      • Operating System:
      • win 7 64
      • Monitor(s):
      • 17 inch dell
      • Internet:
      • shaw 25 mbit/s

    Re: motherboard frying psu

    tried with a 6850 same problen now it won't even boot dram light on board blinks thats it .nothing happens fan will not even spin

  12. #12
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    Re: motherboard frying psu

    A lot of modern PSUs need load on the black / green connection, and not just a bit of wire. A simple resistor is normally enough.
    Worth trying before considering them dead (or try in another system)
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  13. #13
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    • big_hairy_rob's system
      • Motherboard:
      • ASUS Z170-A
      • CPU:
      • Intel I5 6600k
      • Memory:
      • 16GB DDR4 Corsair Vengence (3000mhz)
      • Storage:
      • Samsung 850 500GB, WD Blue 1TB
      • Graphics card(s):
      • MSI Radeon R9 275
      • PSU:
      • EVGA 550W (80 plus Gold)
      • Case:
      • Fractal Design S (Windowed)
      • Operating System:
      • Windows 10 64.
      • Monitor(s):
      • Iiyama ProLite E24B3HS 24", LG Flatron L1950SQ19"
      • Internet:
      • Plusnet (infinity)

    Re: motherboard frying psu

    May be another stupid question, but have you tried the motherboard out of the case, in case of shorts? I know that it's a pain and a long shot, but worth investigating.

  14. #14
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    • ekamdeep's system
      • Motherboard:
      • gigabyte h61
      • CPU:
      • i7 2600
      • Memory:
      • 8 gb gskill 1600
      • Storage:
      • 1 tb western digital
      • Graphics card(s):
      • r9 290 reference
      • PSU:
      • 1200 watt ax corsair
      • Case:
      • haf 932
      • Operating System:
      • win 7 64
      • Monitor(s):
      • 17 inch dell
      • Internet:
      • shaw 25 mbit/s

    Re: motherboard frying psu

    yep tried it out of the case no result
    dram lights blinks nothing happens

  15. #15
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    Re: motherboard frying psu

    Have you tried a BIOS reset on the Motherboard?


    Isn't salad what food eats??

  16. #16
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    • ekamdeep's system
      • Motherboard:
      • gigabyte h61
      • CPU:
      • i7 2600
      • Memory:
      • 8 gb gskill 1600
      • Storage:
      • 1 tb western digital
      • Graphics card(s):
      • r9 290 reference
      • PSU:
      • 1200 watt ax corsair
      • Case:
      • haf 932
      • Operating System:
      • win 7 64
      • Monitor(s):
      • 17 inch dell
      • Internet:
      • shaw 25 mbit/s

    Re: motherboard frying psu

    yes tried bios reset
    removed cmos battery for 10 min psu plugged off
    no use

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