I'm trying to control the fan of an ASUS EAH4670. Since out of the box it can't control the fan, I disassambled the BIOS using Atomdis and using an hex editor added the corresponding command table to it (#39, SpeedFanControl). Still, the card can't change it's fan speed. I guess something i's lacking in the PCB, and from this guide I think that maybe it's possible to add the component that is lacking. The problem: I have no idea about electronics! I would very thankful for any help/pointers. PS: Here is a photo of the front & back of the reference PCB from ATi.