- You're only guaranteed the advertised frequency of the RAM.
- The mobo also has certain RAM frequency "guarantees" 6000MHz in this case.
- This is also dependent on the IMC within the CPU to be able to handle > DDR5-4800.
Your guarantee is the lowest of the 3 above factors.
Of the 3, Intel's IMC is the least limiting of those factors (in terms of >4800MHz operation).
The DDR5 landscape is relatively new. I don't follow DDR5 OCing super close, but I have seen reports that [some] kits are able to hit frequencies far beyond their advertised spec. Do your research of the specific kit you intend to buy though. Don't take my word for it.