Needing Help

[nyominn]

I recently bought the MSI EDGE Z390 MB and installed windows10. I have 3 storage devices.

1. 240GB  M2 for windows

2. 500GB M2 for Games

3. 4TB HDD for Data Storage.

And I am using Gigabyte Aorus GTX 1660ti. 

Problem is I keep getting crashes randomly (but mostly) while playing game. Errors showing "IRQL NOT LESS OR EQUAL" and I did resetting PC, then it was fine for a while and then got crashed again while I am playing "Kingdomecome Deliverance" on steam showing error of "Kernel Mode .. something that I couldn't remember"

Now I am really confused and don't know what to do, can someone please help me?

Oh, my memories are G Skill Trident Z 3200 but I am not overclocking it, using with default value 2133 Hz, with XMP off.