ram making pc crash?

[ayyyyZJ]

hi guys, i recently bought another 8gig kit of ram so i can go to 16 gigs of ram (the kit i bought) and this is the same ram and same item i bought of amazon. whenever i play games, the system seems to crash, out of nowhere. i run stress test after stress test with aida 64, no crash but when i run csgo or pubg, it crashes. i ran my system without the ram for 2 weeks to be sure, and i have not had any crashes until i put the ram in again today. 
does anyone have any idea how to fix this/why this is happening?

thanks, and have a great day!

[Vandorlot]

Run memtest86 for around 3 hours. If there are any errors then the ram is broken and you should return the ram to the manufacturer.

[orangecat]

Run memtestx86+ for about 5-10 runs and if it's fine then it's likely not your ram. Ideally you shouldn't buy a second kit like that but instead just buy a new 16GB kit and sell off the older 8GB kit because different ram kits aren't validated to work together even if they are the same spec. For example I bought a second 8GB kit of the same ram and my original kit could overclock to 2400Mhz but when I added the second kit I could barely get 2200Mhz to be stable. It's really not recommended to just add ram to a system even if it's much cheaper.