Cant get bios mod to work on MSI Gaming RX 480 4GB

feels like i have read a years of stuff about bios modding but some reason I am not getting this right.

I have 4 MSI Gaming RX 480 4GB Hynix. I get stable 22 Mhs on Claymore 8 stock rom and no overclocking.

So I tried to mod one of the cards but after flashing the moded bios and restarting the card does not work.

On windows 7 64Bit. AMD 16.12.2

used PolarisBiosEditor 1.4
AMD/ATI ATIFlash 2.74

1500 value copy into 1750 and 2000
1425 value copy into 1625
1375 value copy into 1425 and into 1500

any suggestions?