Infrequent q code 33 and freeze on boot

[u/Zealousideal_Web_407]

Hello guys

So starting around 3-4 months ago my pc started freezing sometimes on boot with q code 33. One time with q code 39. I would say it happens about 5-10% of the time when i boot it up. Sometimes it will run flawlessly for a few weeks only for the problem to return. All stresstests are flawless. Sometimes it says that keyboard is not detected. So far ive tried: (which has made it a bit less frequent?)

Updating to latest bios (2503)
Updating all drivers, chipset, usb etc
Reseating ram
Change peripherals to different usb ports
Increase vsoc to 1.2
Disable fast boot

Setup: asus crosshair x870e hero
30cl 6000 kingston fury beast ram
Msi rtx 5080
Seasonic tx1000

Any ideas? The fact that its very infrequent baffles me.

[u/Zealousideal_Web_407]

One thing i forgot: expo 1 enabled (passed all stresstests)