Hi,

I'm having a hard time using AMDOverdriveCtrl to achieve results for lowering memory speed. My setup has 3x6990's and I can basically use only the middle card's 2 GPU's because the other two will have crazy hot temperatures.

AMDOverdriveCtrl modifications don't stick and may show as current peaks, but current clocks remain exactly the same. I load the profile for each according to their -h index number. The ranges are lowered and set via aticonfig command, but it doesn't work. Am I missing something here?

In many topics it is suggested that BIOS flashing could be the answer, but can't really find anybody with successful conclusive experience doing that with 6990. I'd appreciate a hint to a guide if there was any.

Is there a solution in linux for my dilemma or should I move to Windows 7 and stick to x6990 (4GPU) setup and find another system for my third 6990?

Your feedback would be greatly appreciated!

Forsythe





My configuration:
CoolerMaster HAF X
CORSAIR AX1200 1200W
Asus Crosshair IV Formula
AMD Sempron 140
3 * Asus HD 6990
Kingston 30GB SSD
2GB Ram
Ubuntu 11.04 64-bit

I tried:

wget -O amdoverdrivectrl_1.2.0_amd64.deb "http://downloads.sourceforge.net/project/amdovdrvctrl/deb%20binaries/amdoverdrivectrl_1.2.0_amd64.deb?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Famdovdrvctrl%2F&ts=1307967653&use_mirror=switch"

sudo dpkg -i amdoverdrivectrl_1.2.0_amd64.deb

As suggested here http://forum.bitcoin.org/index.php?topic=7514.msg212294#msg212294

But with the "wget -O...etc." command it contacts sourceforge.net and returns a NOT FOUND message.

Another method I saw in another thread http://forum.bitcoin.org/index.php?topic=11561.0 seems to install amdoverdrivectrl also, but it includes several other things, so I don't want to mess with the mining rig until someone knowledgeable can confirm it's ok.

And of course, I can't post directly in those threads because I have to fill my Newbie quota, sadly.

The reason I need to do it this way is because my rig is in another country and my buddy helping me with maintenance over there is out of town for a few days.

I need to get the memory speed down and see if that can cool my GPUs down a bit. I've got 3x6990 btw, but can only operate 3 of the 6 miners at the moment, because the temperatures are simply insane otherwise. I've tried flags and stuff, but it will need to be the memory speed tweak I suppose.

Thanks in advance for your kind help.

Cheers,

Ixfinito