I am also looking or a solution for my Palit GTX1060 card which has Hynix memory too.
Instead, I let it mine with zcash as it can reach 320 sol/s EWBF zcash miner.
I can only manage to get 19.x MHs if overclocked at +490 - +500.
I got x6 1060 6GB Palit recently. All with samsung memory.
x4 cards with 86.06.45.00.23 vbios version and
x2 cards with 86.06.39.00.12 vbios version.
86.06.39.00.12 shows 20 MH/s in stock, but
86.06.45.00.23 only 15 MH/s in stock.
Im going to flash all cards to 86.06.39.00.12
Looks like there is nothing wrong with bios version. Just find out that x4 my cards with hynix memory. And that is why it shows only 15 MH/s in stock. Damn hynix...