Bios problem

Hi,
I recently purchase an Rtx 3070 and I have the four beeps problem. Disabling CSM from bios, at the first boot all would seem solved, but if I keep the computer off for some time, the CSM automatically returns enabled by setting the Video OProm Policy equal "legacy" instead of "uefi only" with four additional beeps (8 total) at the first boot... then only 4 :(
What could be the cause considering that the system work properly? Thanks

- Motherboard Asrock Z170 Pro4 (2018 bios update)

bjlockie wrote: I read disabling CSM and reinstalling Windows fixed it for someone. I don't think I'd bother if it works now.

Thanks for the reply but I would to avoid formatting and reinstalling windows. There must be another solution... I hope