Technically, Yes you can 
Here is what I did :
Mod your original Nitro 480 by copying 1500 straps to 1625-1750-2000 on PolarisBios Editor. Save as a new mod file. Use atiflash to program your new mod file.
Reboot your machine and Run MSI Afterburner. Run your miner. Your Power draw will stick around 110 watt while mining. Set you Clock to 1050-1100 and wait to see ~85-90 Watt power draw. If you catch around 1090-1100 go by 1 at a time like 1095,1096... Mine was 1096 = 85 watt 1097=110watt. There is a jump point.
After you catch the point, increase your memory until it freezes then lower your memory 5 or 10 units to see if your miner stable...?
By doing this last night I was able to mode and OC my cards successfully. Sometimes you see your miners gets error. It is because memory is to high. Lower little bit. You should be good at 29mh+
Hope this helps.
Here is what I did :
Mod your original Nitro 480 by copying 1500 straps to 1625-1750-2000 on PolarisBios Editor. Save as a new mod file. Use atiflash to program your new mod file.
Reboot your machine and Run MSI Afterburner. Run your miner. Your Power draw will stick around 110 watt while mining. Set you Clock to 1050-1100 and wait to see ~85-90 Watt power draw. If you catch around 1090-1100 go by 1 at a time like 1095,1096... Mine was 1096 = 85 watt 1097=110watt. There is a jump point.
After you catch the point, increase your memory until it freezes then lower your memory 5 or 10 units to see if your miner stable...?
By doing this last night I was able to mode and OC my cards successfully. Sometimes you see your miners gets error. It is because memory is to high. Lower little bit. You should be good at 29mh+
Hope this helps.
I already did it but it did not work. im copy 1500 to all values above 1500. 1625 until 2000
and im put 1100 for gpu clock and 1950 to memmory clock ! but no work. screens freeze all time
The polaris have two groups!!! one that begins with 1: and another that begin with 2:00
obs : some people tell me this is not the best method and Polaris can not be used to change the bios of rx480 nitro with elpida memmory
Polaris
