Crashing PC

[NLamki]

So last week my PC started crashing whenever I launch a game, at first I assumed it was my mismatched ram, since I have 2 different kits of DDR4 but they're both the same specs (2x8gb 3200mhz cl16) and (2x8gb 3200mhz cl16). 

I added the 2nd kit 2 weeks ago so I thought it was weird that it only started crashing a whole after the ram was installed. After removing the ram and keeping only 1 kit of 2x8gb RAM I still experinced the same problem. I don't know what causes this but it seems completely random and only allows me to play the game after it crashes 4-5 times. What could be the problem? 
I have that LED thing in my motherboard and it flashes CPU and DRAM after crashing. it goes CPU+DRAM then CPU then restarts.

My CPU temps do not exceed 65+ as I'm using an artic freezer 2 aio 240

[Mark Kaine]

run memtest86 see if it finds anything. 

 

if it doesn't, reset CMOS and load 'optimized default settings' and do not change anything else.