So I tried nerdralphs tool and seemed to work ok. Something I am confused about is how can I change the voltage offset in the rom. For example I am testing with my xfx triple x 8gb card. I took the 1750 and 2000 straps and put them in his tool and copied the new value in polaris. Now when i start up the miner and open watttool I can set the voltage offset in windows watttool to -18 and shave about 40 watts. I am unsure how to set this in the bios because I cant find an equal tool for linux to set the voltage offset. I came across a few threads talking about I2C but I dont fully understand where that is and how I can change it to stick in the bios.
Bios editing, the actual editing in a hex editor, is best done by the people who have been doing it for a while, and thus know a lot about it. People like Eliovp or Wolf0 etc.
Now a bunch of them got together on this thread to discuss and share how/what they do and the shared with us (most of) the secrets to tighter memory timing, and we are very thankful to them for it.
What they haven't shared is details for adding an offset in the BIOS in a foolproof way, they did share the broad steps for doing it and people who have some understanding of BIOS editing managed it.
People like you or I on the other-hand would need to either need to buy the offset modded roms from one of the people who are good at doing them, spend the time and energy needed to understand Hex modding enough to do it ourselves, or just be happy with watttool based offsets. I chose the third option.