AMDOverDriveCtrl mid-level voltage linux

[steelhouse]

I have a 6870 card and AMDOverclockCtrl does not allow me to change the voltage on this card.  I tried Radeonvolt without luck.  I would like to use the mid-level settings on the card.  Is there any way to use aticonfig to force the card to use the mid-level settings.  Is there another tool?  Can I use RBE someway to  underclock the voltage?

Thanks

[wacko]

I've had 6850 some time ago, and yes, it was possible to edit voltages via RBE. Not the frequencies, though. Just edit values in the "gpu registers" menu.

[3phase]

Try atitweak:

https://bitcointalk.org/index.php?topic=25750.0

if it can be overclocked/undervolted, it will do that. If this does not work, then you need a BIOS flash with RBE. I always try to avoid that.

[steelhouse]

Thanks for the responses.  Radeonvolt, I think I can change some settings before I compile as root and it might work.  atitweak is a very nice tool, however, the 1.175 voltage remains same when I check status.  I will try RBE when I really need it.  The cards undervolt easily with MSI afterburner on Windows.  The 5830 voltage sticks with radeonvolt.