Pc crashes every 5 minutes even on idle, needs power cycle to restart

Apr 29, 2018
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Hi,

So about a month ago, this problem started to appear. My PC has been working fine for past year(it's a new PC i build) but last month suddenly it started crashing at random times. And by crashing i mean no bsod, no warning, no freezing of any kind. Just as if someone pulled the plug.

Then when i try to restart it, it won't restart unless i pull out the plug for 10-20 seconds.

At first, my PC would only crash once or twice a day, and after restarting it'd work fine. Now, however, it can't last even 5 minutes. Within 5 mins of starting it'll crash.

I've cleaned the chasis, the heat sink, reapplied thermal paste, tried to run it with one panel of chasis open, tied all the open cables from PSU neetly in chasis(assuming shorts might be causing the problem) and nothing works.

Very rarely although, some times i am able to run it for 30-40 mins before it crashes, and i don't know why.

I checked the temperatures with HWMonitor(when it lasted more than 5 minutes) and they were as following:
CPU : 50-78 °C
MOBO: 29-39 °C
GPU: 42-65°C
CHASIS: 32-40°C

My build is following:
CPU: AMD FX 8350 Black Edition with cooler master stock cooler
GPU: ATI RAEDON R9 270X
RAM: Corsair Vengeance 6GB (4+2)
PSU: Corsair VS450
HDD: WD green 2TB + an old Samsung 120GB(which i keep the os on)
MOBO: Asus M5A97 LE R2.0