[coreboot] Differencies between AMD microcodes

David Santamaría Rogado howl.nsp at gmail.com
Sat Apr 23 03:55:40 CEST 2011

I'm trying to bring up support for Gigabyte GA-MA785GM-US2H. Actually
there is GA-MA78GM-US2H and GA-MA785GMT-UD2H that are similar.
GA-MA785GM-US2H only differs from GA-MA785GMT-UD2H that it's DDR2 and
AM2+ instead of DDR· and AM3, so, i copy the folder ma785gmt to
ma785gm and started to change places where appear as am3 to am2r2 and
ddr3 to ddr2.

To finish I look the differencies between GA-MA78GM-US2H and
GA-MA785GMT-UD2H and I see that config AMD_UCODE_PATCH_FILE of
GA-MA78GM-US2H is mc_patch_01000095.h and GA-MA785GMT-UD2H is
mc_patch_010000b6.h. I don't know what to apply for GA-MA785GM-US2H,
if *95.h is used when the socket is am2+ and *b6.h when it's am3 I
have to use *95.h, but, if *95.h is used when the chipset is 780 and
*b6.h when it's 785 I have to use *b6.h. So the question is what it's
the difference between the two mcs and which one should I use for a
785g chipset am2+ motherboard?

Thanks in advance.

More information about the coreboot mailing list