Lately i got some 470 in my hand gpuz showed hynix memory i said ok but card was acting wierd then opened it and saw memories are samsung
so i downloaded from techpowerup samsung memory bios and flashed now working without any issues. maybe you also have same problem
https://www.techpowerup.com/vgabios/190672/sapphire-rx470-4096-161012Memory Support
4096 MB, GDDR5, Autodetect
4096 MB, GDDR5, Elpida EDW4032BABG
4096 MB, GDDR5, Hynix H5GC4H24AJR
You need to carefully study this parameter. I'm not 100% sure, but if you use such a BIOS on a video card with Samsung memory, then the video card can turn into a brick.It is better to use a bios from the manufacturer, but if there is no bios with suitable memory, then you can use a bios from a similar video card from another manufacturer. If your video card has 2 fans, then choose a video card with 2 fans from another manufacturer. But don't forget the risks.