Question PC constantly shutting down randomly, is my PSU failing?

Sep 25, 2020
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I've had this PC Build since 2013, Specs are:
AMD 8350
Corsair 8GB DDR 3 ram
GTX 780
Corsair CX750M PSU
Corsair formula v motherboard
1TB SSD
Windows 10 Pro 64 bit

One day my GTX 780 was showing blue dots across the screen and my PC would shut off after 10-15 minutes. I'm using an old radeon 6850 for now but i'm still getting random shutdowns especially if i'm playing hearthstone and have multiple tabs open on a web browser, other wise it can stay on for hours without any issues if i'm just browsing the web.

These are the things i've done so far:
  • Added thermal paste to CPU
  • Swapped RAM on different slots
  • Cleared the CMOS
  • Cleaned out all dust from all components
  • Set sleep options to 'Never' on power options
UPDATE Just downloaded and ran OCCT and the PC shuts down during the test

These are the readings on IDLE using HWmonitor


 
Last edited:

Vic 40

Titan
Ambassador
Hard to say with such an older pc , but since not their best might it be the psu. The value of the 3.3V rail is to low in hwmonitor. But it's a software tool. Can you test with another psu? Maybe from a friend or local shop .....
 

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