BIOS Mod for RX 470 with micron Memory possible?

Hello,

I have get my cards SAPPHIRE Radeon RX 470 Nitro 8GB OC (11256-17-20G) but on the cards have micron Memory. At stock the cards make 24 mh/s by 180 Watt and the Question is, it is possible to Mod this cards and make the cards a little bit faster and reduce the power consumtions?

Original Bios Backup
https://www.file-upload.net/download-12478023/bios_470_org.rom.html

Picture from Polaris Editor

http://www.bilder-upload.eu/show.php?file=5862a9-1493843633.jpg


Update:
a other user from bitcointalk send me a moded BIOS so i get 25,8 mh/s now but the power is in the moment bei 389 Watt at the wall (2 cards at the moment 389 watt - 50 watt für the system = 339 / 2 cards = ~170 Watt per card)

here are the moded Bios from the other forum member, but i do not know what was the change to the original bios
https://www.file-upload.net/download-12478471/bios_470_org_micron_mod1.rom.html


can we reduce the power and get a little more hash rate?

Willi