[coreboot] [AMD 16h / ASUS AM1I-A] 1866MHz CL9 RAM runs only as 1333MHz CL9 - how to fix?

[Mike Banon]

A pair of 1866MHz CL9 RAM modules* runs only as 1333MHz CL9 on 16h
AM1I-A with coreboot is installed, but worked faster when a
proprietary UEFI was installed. To fix this "turtle RAM" coreboot
problem I tried to play with buildOpts.c -
https://review.coreboot.org/c/coreboot/+/33920 , but the things like
"#define BLDCFG_MEMORY_CLOCK_SELECT DDR1866_FREQUENCY" sadly did not
help.

Any ideas how to improve the RAM speeds? How I can force this RAM to run faster?

Best regards,
Mike Banon

[*] Crucial Ballistix Tactical Series DDR3 1866MHz CL9 (PC3-14900
9-9-9-24) UDIMM 240-Pin modules, part number BLT8G3D1869DT1TX0