Alienware R2 15 shutting down on games.

May 17, 2019
I've had this laptop for over 4 years now with no problems until lately it has been crashing while running games, it started with warhammer 2 a pretty demanding game. The screen dimmed and the power button flashed yellow as if i pulled out the power adapter for about 2 seconds before coming back on and then it shut off without warning. I could play older games until now i cant play anything without it crashing within 10 seconds to 30 mins. It will crash while the laptop is still cool, ive run heat monitoring programs while gaming and the heat was fine. Sometimes i get 5 beeps upon restart indicating a bad CMOS battery, this only happens after a crash. I replaced the CMOS and it came up fine in the scan. It seems to be a bug and not the cause of the crashing though. Anyone know what the problem may be and how to fix it
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