Hi,
thank you all for the quick reply.
If the DIMMs work with the production BIOS but not with your BIOS, it is possible that you are using low cost modules that do not have a valid SPD checksum. The coreboot project is configured to validate the SPD checksum, while the Asrock production BIOS is configured to ignore the SPD checksum. To test your coreboot using the DIMM SPD checksum ignore option, change BLDCFG_IGNORE_SPD_CHECKSUM in buildopts.c and try it that way.
I just tried that with fresh new tree, but the output remains the same. (except build timestamps...).
The RAM is one dimm: PATRIOT PSD32G13332H Desktop Memory Device Signature Line (DDR3 SDRAM,2GB,1333MHz(PC3-10600),CL9,256 x 64,DIMM 240-pin,Unbuffered)
Thanks, Tadas