Hi
Coreboot has not merged K8 and fam10 support so you have to compile for one or the other. (Fam10 being more modern and having a higher amount of maximum cores per cpu package)
Daniel Kulesz via coreboot coreboot@coreboot.org writes:
Hi all,
the Wiki page for the kfsn4-dre is somewhat incomplete. It mentions that
"K8 processors currently require specific RAM configurations to work correctly. "
I don't have this particular board but K8 raminit code is a bit unflexible with respect to using different dimms and will very quickly disable a dimm if they are unmatched.