How to add fan control to an HD4670? (hardware mod, not CCC tweak)

[TrentZ]

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.

 

[PVTCaboose1337]

So you cannot just change it in the CCC?

 

[TrentZ]

No, even with ASUS SmartDoctor.
The BIOS that came with the card had the SpeedFanControl command table empty.

 

[CJCerny]

How about a Zalman Fan Mate 2 fan controller?

 

[TrentZ]

That's exactly what I'm using right now, but I would prefer the speed adjusted to the temperature instead of being fixed. I'm getting something like 77º avg/78º max with Furmark using the fan mate.

 

[AlienIsGOD]

I dont know if its still the same but only the 4800 series has fan control enabled in CCC. It was that way when i bought my card in Sept. im not sure if it has changed. There is a workaround if it hasn't changed http://forums.amd.com/game/messageview.cfm?catid=260&threadid=102330&highlight_key=y&keyword1=fahn

 

[TrentZ]

There are some 4670s that have fan control, for example the PWC and the Sapphire GDDR4.

 

[HossHuge]

rivatuner