Looking for help on why my pc crashes after few hrs of playing games?

Aug 15, 2018
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Hello everyone im kinda new at this website so ima try and explain this the best i can.

Problem: My Pc is crashing only when i play games it never has crashed while i was browsing the web. Depending on what games i play is how long it takes to crash, When im playing fornite i crash a few hrs in it my screen will either freeze and just stay froze fans will kick up high and i will need to manually shut it down or restart. The other way is i just get a black screen and it will just sit there silently.

Pc Specs: Processor- AMD A10-7860k Radeon R7, 12 Compute Cores 4C+8G 3.60 GHz

Installed memory (RAM): 16.0 GB

SYSTEM TYPE: 64-Bit Operating System x64 based processor

Graphics Card: NIVIDIA Geforce Gtx 1050