Change memory timings from 1500 or 1625 megahertz
Make it so
https://www.techpowerup.com/vgabios/185513/sapphire-rx480-4096-160712400 MHz: 4-4-5-5-18-7-39
800 MHz: 7-7-11-11-34-10-79
900 MHz: 9-9-12-12-38-11-89
1000 MHz: 9-9-13-13-41-12-98
1125 MHz: 11-11-15-15-47-13-111
1250 MHz: 12-12-17-17-52-15-123
1375 MHz: 14-14-19-19-57-17-136
1425 MHz: 14-14-20-20-59-17-141
1500 MHz: 14-14-20-20-61-18-148
1625 MHz: 14-14-20-20-61-18-148
1750 MHz: 14-14-20-20-61-18-148
2000 MHz: 14-14-20-20-61-18-148https://www.techpowerup.com/download/You will need ATIWinflash and PolarisBiosEditor-1.6.7