Hello,

I have a sapphire 7950 OC dual-X (11196-19 flavor) and I am running ubuntu 13.4 with the last stable drivers.

The stock voltage for this card is 1.25V.

CGminer (3.1.1) cannot lower the voltage below 1.125V, where triXX can set whatever value I want to try.
By the way, under windows CGMiner can't go below 1.125 neither ... but using triXX in parallel works.

Does someone know a way to lower the voltage in my linux setup ? (from my tests under windows, 1.05 or even 1.0 would do well - and 40W less)

My card has a second bios, but it behaves similarly and with an even higher stock voltage ... 1.169V minimum if I recall correctly.

I'm considering using the bios from another (older ?) card, but I'm not sure which one would do ... (brand / model / ... ?)
And changing the bios is kind of last resort ... I would prefer a software way, especially since triXX is working !

Thanks for your advices !


PS: cgminer not changing voltage below 1.125 means that it says "ok" when I put something lower, but still indicate 1.125 afterward and the power consumption does not move one inch.  (It does with triXX)