Problems modding Sapphire Nitro+ 580 4gb ( Hynix memory )

[Destruxia]

Bought 6x Sapphire Nitro+ RX580 4gb ( all with Hynix memory ). Out of the box, they are hashing at ~24Mh/s, which is great. However, after modding the bios, there was absolutely no change in hash rates, and furthermore, Trixx or Afterburner are useless in trying to overclock them. Neither of the software is aplying the changes. Using Claymore 9.3 and trying to OC them with it didnt help either. Its like cards are refusing to accept any kind of changes at all. I'll try to describe as detailed as i can what we did with the cards bellow, really could use some help here, im running out of ideas.

1. Saved the original BIOS.
2. Modded it by copying values from 1:1500 onto 1:1650, 1:1750 and 1:2000.
3.Programmed the modded BIOS onto the card.
4. No change.

We were using 17.2.2 drivers first time ( patched them with pixel patcher ), tried the combined driver from Cryptomined after that, no change whatsoever.

If i can provide more info i would be more than happy to. Frankly, im a bit pissed off, cos i know they are working, and that they can do better, but i just cant do shit about it with the knowledge that i have. I'd be really gratefull for any kind of help.

[RazerBoy]

Go to my thread, https://bitcointalk.org/index.php?topic=2237432.0 . I've got my babies to 28.5. But I'm still looking into ways to get it to 29.5 or 30.5 with 900 on DCR. If you want you can help . Help is always needed xD!