Check the fan s are hooked up to the correct Mobo input. And the bios is the right one for the CPU. Dbl check ram is all the wat seated in Dimms on both slots.
If it's going to sleep M2 ssd are not great for this. I ran into same troubles. I set mine to gigh performance and never sleep or hibernate and no more problems.
Also try with one stick of ram at a time one maybe bad and not showing up with memtest.
I was wondering do you need to pull the label off from a M2 ssd before putting the heatsink on? I would say yes but it's my first. So I thought I would ask.
Thanks
My Chair I have is a wanna be gaming chair. One arm rest is coming off but it's still doing it's job. A lot of miles on it! I like it cuz it's broken In lol