Computación - My PC turns off while im playing

Please help me!

Since yesterday my pc turns off while im playing, i tried to keep it on for 10 hours(just listenning some music and watching some videos) and it never turns off, but when i started playing(csgo) it just turned off like when you pull the cable off, and when i turned on again doesnt show any error . By the way, i just repaired a month ago, cause it had one damaged RAM memory

About my PC:
Win 10 Pro
Processor AMD Athlon(tm) II X2 250 Processor 3.02 Ghz
Installed RAM 4,00 GB
System Type 64-bit OS, X64-based processor

Revisa los ventiladores, que no estén tapados o sucios y que funcionen correctamente... la mayoría de las veces es por problemas de temperatura.