i change it by adding the vddc and mvddc offset in the rom, this because it's standard not there.
Same goes for Fiji, VDDC and MVDDC offset are not standard in the rom, i had to add those myself.
Hmmm .... seems like I wasn't the first to create/release these ROMs?

.
Couldn't have done it without you

. Wouldn't even know where to start if it wasn't for you

Check the op
Some old info and blabla:
Hey,
As we all know, the R9 Nano is one of the most energy efficient GPU's out there at this moment.
In the past months i've done numerous of tests on how to get this card as stable and as power efficient as possible.
I've been thinking about sharing my results and tests and came to the conclusion to keep it short and as helpful as possible for every Nano owner out there.
I modded my Sapphire Nano rom (with A LOT of help from Gupsterg) to the point that it almost dropped 50% in power usage at the same speed 
And i would like to share that.
Please be careful. (you have a secondary bios switch, so you can always switch back)
For all the *nix users out there. This might be very interesting for you guys because i know what a hassle it is to change voltage in linux. Yeah.. not...
Also, if you want to flash in Linux, that isn't possible right now. You'll need Windows. (And not a bootable version! Won't work on Fiji..)
Enjoy! Changed the "someone" part to Gupsterg now that you're here
