there you go:
Keep in mind that we do not give any warrantee that it will work nor will we help if your CPU does not support it.
I've tried all BIOS revs. 1.36, 1.4, 1.5, 1.6... and now I'm with 1.5b4. but when I'm trying to unlock the second core of mine Sempron 140, the BIOS correct recognize it as Athlon II X2 4400e, but the windows (XP & Vista) can't boot... it is stopped while loading \WINDOWS\system32\acpitabl.dat
With BIOS 1.6 I was able to boot, but there was only 1 core in the Task Manager :-(
Keep in mind that the same CPU is running @ 2 cores great with my other MB - ASRock M3A790GXH/128M !?!