Calm down . I believe that information you ask is closed by NDA. On the other hand, nobody will forbid you to explore graphics cards' BIOS and/or drivers to acquire information you need. Do you know about RivaTuner, ATI Tray Tool and so on? Their authors did that.
Sorry, I misunderstood you . In your case I just would suggest you to read "BIOS and Kernel Developer's Guide" for an appropriate AMD CPU family. Or, if you prefere a quick path, you may explore (I mean - disassemble) AMD Overclock utility.
Man gigabyte sent me their SDK and yes this is just nonsense.
Also AMD has these types of documentation and SDK its just won't be released to public to anytime soon.
Perhaps, a CPU and/or RAM overclocking is a chipset-specific feature - to be more precise - a motherboard-specific feature. I'm sure that you've already saw some chipset documentation on that link. Alas, it seems to me that it's all you can have.
Hey, AMD! What about the matter we discuss?