Download different Polaris Bios Editor. I think you need version 1.5. search for it, you will find on github.
OMG! :-) Thank you! So simple.
The easiest way is to use SRB Polaris. I've recently updated my guide with this editor.
https://bitcointalk.org/index.php?topic=1954245.0BTW that timing strap from Eliovp is for Elpida... it might work with Hynix, but I'm pretty sure he made it from Elpida strap.
What is your opinion, what is the maximum ETH hashrate with solid power consumption/solid temperature for a Sapphire RX470 4GB Hynix?