Which motherboard are you using? Z690 since DDR5?
Check which BIOS version you're running - if it's the stock one that used to give stability issues. If that is the case, you will need to update your BIOS (check your mobo vendor website for BIOS files) in which case it may run more stable.
One way I could identify it was by running CPU-Z and checking the bus speed of your CPU:
If you haven't changed it, it should run at 100.00 MHz - If there is a large discrepancy (mine ran at 97.xxx MHz before BIOS update) then you are on an old version and should upgrade.