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Level 8

MOBO rog crosshair x670e extreme, installed 128gb ram 6000 mghz, bios only reading 4800 mghz, anyone help with what needs to be changed for bios to enable the full speed of the RAM.



Yep, unless you run them at stock.
Just how things are on AM5, not much board vendors can do. You can run any one of those kits at stock, or consider a lower density.

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Thank you once again, below is a suggestion from another contributor, whats your take on that ?

""So if you want to run supported 4 DIMMS with 128GB and up, the only kit is the 4x48GB - this has "Socket Support" for 1,2,4 configurations and also runs fine on my Strix e-e board.""

As mentioned above, that kit is on the QVL 👍

13900KS / 8000 CAS36 / ROG APEX Z790 / ROG TUF RTX 4090

Ah ok - I did not know, that all kits on the QVL are basically supported at stock (for DDR5: 4800 MHz) and the Socket-Support column is only valid if you plan to overclock the DIMMs to DIMM-vendor RAM speed (which is usually more than 4800 MHz).