For HIS they don't any bios available for my card, I flashed my card with some unverified bios and now after driver installation my screen is freezing for a few mins and then it crashing.https://www.techpowerup.com/vgabios/188897/188897
or search on their site
mine is 4Gigabytes, this one's for 8gigs cardhttps://www.techpowerup.com/vgabios/184600/his-rx480-8192-160603TechPowerUp
Extensive repository of graphics card BIOS image files. Our database covers submissions categorized by GPU vendor, type, and board partner variant.www.techpowerup.com
AMD/ATI Flashing Guide
Hi Everyone! If you are reading this the guide is probably for you!!! This guide is an updated refresh based on or in part by other similar threads throughout TPU and my own personal experience (I used to be an nvidia guide but this 290x is too fun) it also covers all current information based...www.techpowerup.com
Note: Flashing guide may be outdated.
I did and sadly it gives me some stupid error saying subsystem IDs mismatch even if I try the same bios from other manufacturers for the same cardYou're gonna have to ask somebody on many forums to upload bios for you, since as you may see there is only one version of HIS.
But I dont think soo any other bios should make you trouble, just match the memory.