PC shuts down after playing games around 40-50 minutes for no reason

Hi, i don't think that it's related to PSU, but when i done some reasarch all the source i can find says it might be related to PSU.
But i just changed the PSU i had, and the new one is 600W, i can't find the solution for so long and i can't use my PC properly.
how do i fix it?
The system keeps working, but the screen is compeletly black and it says ''no signal''

Also i don't understand firmware stuff, so if i have to show some logs and bug reports please tell me how to do it.

Steve C said:

Could be thermal shutdown when the CPU is stressed like when playing games. Check the CPU and mainboard temperatures. Check the CPU and GPU fans are spinning and not clogged with dust.

nope its not about tempreture, when i run some games and programs my GPU is around 55-68 also the CPU is around 55-65

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MisterEd said:

Are you using a good name brand power supply? Which one are you using.

A 600 watt power supply should be enough but only if you have a good power supply.

Even name brand name power supplies can go bad. My computer when playing games started to crash with the screen going black. I suspected the Corsair RM750i power supply but only proved it by substituting a 12 year old Antec TP650 power supply. The power supply was still under warranty so I got a new one. The problem was solved.

Yeah i am sure MSI is a quality brand but the old one i had was really a bad one, also i accidentally burnt it so i had to change.
(MSI MAG A600dn 80 plus)

dalchina said:

Hi, is that an abrupt shutdown - as in BANG sudden - or the normal graceful (slow) shutdown?
Do you see Event ID 6008 in your event logs?
https://answers.microsoft.com/en-us/...7-9f9cb989de8f

Are you overclocking?

But you also say 'The system keeps working' - could you explain what it's doing that makes you think that? It seems it's actually unusable from your description.

i am not overclocking and yes it is abrupt, the reason why i say the system is working because i was in a discord call when the incident happened, i was asking my friend ''can you hear me?'' and the answer was ''yes'' so im pretty sure it is working or at least keeps running the recent program.

dalchina said:

Plus have you done a RAM check?

yes i tried to running my components with OCCT, there wasn't an issue.