RX 6600 XT upgrade

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system information

I finally decided to replace my old RX 480 8GB with an RX 6600 XT with Metal 3. I thought the upgrade would be simple, but it took me a few hours of trying everything possible so I decided to share my experience with you.

I thought that just adding agdpmod=pikera to nvram would be enough, as much as I was wrong, this only solved the boot loop, but there was another problem and that was that after the Apple logo I had a black screen.

Solution:

• Add: agdpmod=pikera
• Remove: debug=0x100 keepsyms=1
• Replace SMBIOS: iMac19,1 -> MacPro7,1
• Reinstall macOS to the same drive via recovery.

Specifications:

• MB: ASUS TUF B360-PRO GAMING
• CPU: i5-9400f
• RAM: Corsair Vengeance RGB PRO 16GB 3200 (2666)
• GPU: Sapphire PULSE AMD Radeon™ RX 6600 XT 8GB
• SSD: WD Black SN850 1TB
• BT: TP-Link UB400 (not working since Ventura)