[SOLVED] Computer turns off after few minutes of using it. Powers back on. PSU?

Jan 22, 2021
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These are the problems I have experienced:
  • Computer turns off while trying to install Windows 10 for the first time.
  • After many tries, I was able to install Windows but can´t use it as computer turns off before the login screen
  • Was able to install Ubuntu Linux and can use it a few minutes before the same thing happens
My built has the following SPECS:

  • Msi Mag Vampiric 010 (Case)
  • Corsair TX 750W (CMPSU-750TX)
  • Gigabyte Intel Z490 Aorus Elite AC
  • Intel Core i7-10700K
  • DDR4 16gb 3200mhz Dimm HyperX Fury Black x 2 (32 GB)
  • SSD 500GB Kingston A2000, M.2 2280, NVMe PCIe
  • WD Black WD1001FALS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s
  • BE QUIET! PURE LOOP 280MM - NA0000050186
Everything is new except the PSU which I bought 11 years ago and the WD Black drive.
The PSU works fine in my old computer.

The motherboard has 3 ATX power connectors (24 pin, 8 pin and 4 pin).
My power supply has only a 24 pin and 8 pin, so only those are connected.
I left the 4 pin alone. (see image)




I have done the following (with no success):
  • I am able to enter the BIOS and edit settings.
  • I have flashed the BIOS with different versions.
  • I have tried different combinations of RAM sticks (I have 2)
    • A1 - 16GB (both of them separately)
    • A1 - 16GB / B1 - 16 GB
    • A2 - 16GB (both of them separately)
    • A2 - 16GB / B2 - 16 GB
  • CPU Temperature has not gone over 50ºC
  • Removed WD Black and tried installing OS on Kingston M.2
  • Removed Kingston M.2 and tried installing OS WD Black
Questions:
  • Is there a "y-cable" splitter from 8 pin to 8 pin and 4 pin or something like that?
  • Could I use one of the PCIe or SATA power cables with some sort of adapter?
  • Is it mandatory to connect the 4 pin cable? (I have read all sorts of opinions but they usually says it's ok not to unless you overclock the CPU.)
  • I will try another PSU just in case.
  • Is there another thing I should try?
  • Any BIOS settings I should consider tweaking?
  • Any bootable USB with diagnosis tools I could use?
Thanks for your help.
 
Last edited:
Jan 22, 2021
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OK, so a friend lent me his PSU and I only connected the 8-pin and everything worked fine. I was told older Corsair PSU are notorious for having CapXon capacitors in them, which are known to fail. I wonder if this is fixable or is it better to just get a new one.
 
Jan 22, 2021
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Try using just one stick of ram when booting up the computer to see if it will go to windows splash screen.
Thanks, I did this in all combinations without success
  • A1 - 16GB (both of them separately)
  • A1 - 16GB / B1 - 16 GB
  • A2 - 16GB (both of them separately)
  • A2 - 16GB / B2 - 16 GB
I guess they RAM sticks are OK (or both faulty).
Is there a way to test them with a software I can boot from a USB stick?
 
Jan 22, 2021
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So I bought a Y cable that splits into two 8 pin connectors. I was able to plug one of them to the 4 pin connector and the other to the 8 pin connector. The computer still turns off. Maybe the amount of current through that cable is not enough or I just need to change the PSU.
 
Jan 22, 2021
4
0
20
1
OK, so a friend lent me his PSU and I only connected the 8-pin and everything worked fine. I was told older Corsair PSU are notorious for having CapXon capacitors in them, which are known to fail. I wonder if this is fixable or is it better to just get a new one.
 
OK, so a friend lent me his PSU and I only connected the 8-pin and everything worked fine. I was told older Corsair PSU are notorious for having CapXon capacitors in them, which are known to fail. I wonder if this is fixable or is it better to just get a new one.
No, Corsair TXs has Japanese caps, not Crapxons. You just have an old PSU that is way beyond it's supposed service.
 

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