Question Computer sometimes crashes on boot up, sometime freezes after 30 seconds or so and sometimes it works perfectly

[skfallin]

So my computer usually needs more than one try to boot up, sometimes it freezes on the boot screen, sometimes in the Windows 10 loading screen, sometimes after some uptime, and sometimes it works perfectly fine.
When it starts and freezes right after, it works as normal without issues, lasting about 30–40 seconds then completely freezing without taking any commands.
On Linux I don't have any of the freezing problems nor the bios.
After some reboots, it runs perfectly without any freezing or any issues.

DESKTOP:
Motherboard: Z590 AORUS ULTRA
CPU: i9-11900k
CPU Cooler: Artic liquid freezer II 360
GPU: 3080 evga ftw3 ultra
RAM: 8x2 ddr4 corsair vengeance (I currently use a single 16gb pny ram too for editing work)
1. SSD ADATA SX8200PNP 512gb (Good health status)
2. SSD Crucial CT1000P3SSD8 1tb (Good health status)
PSU: Corsair rm850

I'm even writing this post from this pc and at the moment it's working perfectly..

 

[JohnBonhamsGhost]

computer usually needs more than one try to boot up, sometimes it freezes on the boot screen, sometimes in the Windows 10 loading screen, sometimes after some uptime, and sometimes it works perfectly fine

keep track if adding the odd RAM module has any effect on when this occurs.

 

[skfallin]

keep track if adding the odd RAM module has any effect on when this occurs.

I have this problem for 6 months or so and I added this ram stick only one month ago, I am almost 100% sure that this isn't causing the problem…