My PC keeps crashing when I play games

well as the title says my PC keeps crashing while i play any game in about 30min of gameplay, when i say crash i mean it turns off without any error message, and i cant start it up again for about 10 min this has been happening for the last 10 days and its quite annoying.
i would appretiate any help given, thank you :)
 
Sounds like it may be overheating. Open it up and clean everything out. Dust is a major insulator in computer cases and can drastically affect temperatures. Also try some cable management to improve airflow.
 
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