GTX 1060 PC Crash - white light blinking

[mixerslayer]

Hello, something weird happened to my PC.

I was playing PUBG like almost everyday but today my PC just crashed randomly and automatically turned on with loud strange sound, so i turned off pc quickly then turned on again normally.

Everything was fine i noticed that white light on GPU started blinking i'm pretty sure it wasnt blinking before I didnt know what it meant and still do not know.

So I started playing again and in last 2 hours my monitors turned off randomly 2 times i could still hear sound in headphones for like 10s and thats it PC was still on(fan mobo gpu leds on) but i could do nothing i had to restart PC.

I bought PC like 1 month ago:
-GTX GIGABYTE 1060 G1
-RYZEN 7 1700
-MSI b350 tomahawk
-Corsair Vengeance LPX, DDR4, 16GB
-PSU Thermaltake 630W (from old PC)

Temps are OK

*Before like 2 weeks ago i had "Ryzen black screen problem" but it was related with OC and i fixed it (i guess)

I have no idea what else to say this crash was so scary, at first I thought I lost power in the whole house for a second.

*So i tried again now and monitors turned off immediately after i launch game and PC is VERY loud(probably fans) after monitors goes off

Thanks for help and sorry for bad english!

 

[Dark Lord of Tech]

PSU Thermaltake 630W , needs to be replaced with a quality PSU.

 

[mixerslayer]

Are you sure? 2-3 years ago Thermaltake Smart SE 630W was "bestseller"

And btw i found hundreds of threads about "monitor turn off fans full speed" but I couldnt find a solution looks like i have exactly same problem

White light on GPU only blinking when playing games

@
1.So i updated GPU drivers
2.Reset bios to default
3.CPU stress test with CINEBENCH - everything fine
4.GPU stress test with 3dmark - crash after few seconds

PSU is almost 5 years old

As you can see it is either a graphics card or PSU

What are my options?

Ok so i check GPU power cable and somehow after 1 month the cable disconnected itself from PSU anyway it is FIXED