ho un i512600k su scheda madre z690 ddr5
con 2 banchi ram kingston fury beast 5600mhz
se le ram vanno a 4800 mhz tutto funziona
ma se abilito profilo xmp da 5600 mhz nel bios il pc non parte
You'll need to consult with Gigabyte regarding compatibility; they own the motherboard implementation (including the BIOS memory initialization firmware).
I would add that you are also exposing the CPU to damage... despite the motherboard can support 5600MT/s with OC, this 12th Gen CPU supports up to 4800 MT/s for DDR5... so you are trying to go 800MT/s beyond the CPUs specs... IMO, that seems to be the most probable reason why it won't boot