PC shutting down mid games

[kevin_khoa]

Hi guys I have just built my pc not long ago. I use Radeon RX 470 with intel core i5-6400 CPU @ 2.7 GHz. 
The issue i have is when i play games with heavy graphics usually get my pc shut down after awhile. The games that I ran into this issue with are Batman Arkham Knights, Mortal Kombat XL, Mass Effect Andromeda, Assassin's Creed Unity and most recently, Assassin's Creed Origins. 
When I played AK and MKX my friends told me it was the overheating issues so I upgraded my fan to Cooler Master Hyper T4 CPU Cooler with 4 Direct Contact Heatpipes RR-T4-18PK-R1 from a basic intel fan. It did help extend the time I could play the games before the pc shut down. (My pc base temp is usually aorund 40-50 C without any games and when the games shut down it stays in the 60-70 C range)
Recently when I play ACO it gets really frustrating as the time before the game shut down can be anywhere from 10-50 minutes and it really disrupts the game. I read and the AMD software tells me that my card is the bare minumum to play these games and I should upgrade it.
So my question is what is causing my pc to shut down unexpectedly and should I upgrade my card? And if I should could you give me some recomendations? 
 

[Kurios]

It might sound dumb, but I would really suggest first to not overlook simple stuff... Making sure everything is propperly connected, the stuff that makes contact looks alright, that device manager recognizes every device with it's drivers...

 

My first tought was heat problems indeed! Maybe someone here has a better idea of what is going on

[Gegger]

Welcome to the forums!

I would try running your games with the iGPU, though obviously you aren't even going to get a playable game, see if it doesn't shut down randomly. Could be a card problem. And make sure you aren't accidentally smashing the power button or PSU switch, and check cables.

And I totally agree with UnSimpleCurioso.

[xAcid9]

What PSU you using? 

[kevin_khoa]

19 minutes ago, xAcid9 said:

What PSU you using? 

im using corsairs cx650m

[kevin_khoa]

1 hour ago, UnSimpleCurioso said:

It might sound dumb, but I would really suggest first to not overlook simple stuff... Making sure everything is propperly connected, the stuff that makes contact looks alright, that device manager recognizes every device with it's drivers...

 

My first tought was heat problems indeed! Maybe someone here has a better idea of what is going on

i double check everything multiple time before i play tho but it still happens

[kevin_khoa]

57 minutes ago, Gegger said:

Welcome to the forums!

I would try running your games with the iGPU, though obviously you aren't even going to get a playable game, see if it doesn't shut down randomly. Could be a card problem. And make sure you aren't accidentally smashing the power button or PSU switch, and check cables.

And I totally agree with UnSimpleCurioso.

would i be able to detect the issue running iGPU?

[Gegger]

1 minute ago, kevin_khoa said:

would i be able to detect the issue running iGPU?

Well, you want to see if it's your GPU being broken. In my experience, a broken GPU can cause random shutdowns.

Another thing, see if your PSU is powerful enough.