Seems to be a 570 by specs, try installing newer driver 18.5.1 or .2 (see if it then shows correctly).
Strangely, I found a 580 bios on TPU database that links to a 570 spec card. You might also want to contact Sapphire tech support, just in case.
My PC- Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, NM790 2TB, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T.