I have a friend w/ that card. I've seen hynix(AJR), elpida, and samsung. Whatever they have on hand at the time is what goes into these cards.
@vg54dett
This may or may not help but here's the original vbios' for Sapphire 470 4GB blower (samsung,elpida,hynix(ajr))
https://transfer.sh/ti9bP/Sapphire-470-4GB-blower.7zedit: thanks tadeus1 for spotting my error
looks like the hynix rom isn't the original. At the time I just did the basic mod for a friend. It looks like the hynix rom is slightly modified with 1500 memory strap copied over 1625/1750/2000 strap. I'd have to get the original from him, but I'm sure this will be fine for now