OC90 Latest

Tested with OC90, has optional addition of 6900XTXH configuration.
Tested with MacOS 13.4.
Tested with B660M-HDV BIOS 12.01.
Note: See my repo for details on how to upgrade OC90 (in the zip) to OC9x, the current version.

Use this one. Flash to BIOS 12.01 first. Load optimized defaults in BIOS. Read the readme for full details.