So I am using this modded bios:
https://forum.ethereum.org/discussion/9533/28mh-470oc-nitro-4gb-boysie-rom-dual-mining
It gives a decent speed of 26.6 Mhz, however a watts consumption is around 150-155 per GPU (in a long run), first hour it is less but later on it looks to increase up to 160 watts. Now I have tried to modify this bios in Polaris Bios Editor, however was able to reduce power consumption only by a few watts. Now no matter what I change using this tool it looks that there is no influence to speed or watts consumption.
I have read that these cards are drawing around 100-110 watts from the wall under windows 10 , and tools like wattoman (however windows with 6 GPU's in it tends to be unstable for me, thats why I would prefer to use ubuntu).
Many of you pointed out that modifying offset in hex editors is the way to go, however I don't have enough knowledge and skill to do that. If you are interested please drop me a line, I can provide on original bios or maybe bios from the the link I gave is actually a good start?
Any questions? Just shoot
p.s. if you have already modded working bios with decent speed and low consumption maybe interested to share it against some BTC?
Polaris BIOS Editor isn't going to help. In VoltageObjectInfo, there's *usually* a section dedicated to initializing the regulator, at which point after some major surgery on the VBIOS you can feed it another Voltage ID and value to set a global offset used across all states.