This is not an Official Support thread!!!
I got requested to post a BIOS file of this new MSI Z790 OC motherboard on the HWBOT discord.
Latest stable version P14 straight from MSI HQ
Changelog: What’s new in P14 is the 6.4GHz (1/2-core workload) profile for i9-14900KS in the MSI feature named “P-core Beyond 6GHz+”.
E7E01IMSP14.rar
7E01vP13.zip