I have this system:
Bootloader: OpenCore 0.5.2
MacOS: Catalina 10.15.1
CPU: Ryzen 6 2600x
Mainboard: Asrock B450M Pro4
RAM: G.Skill DDR4 2166 Mhz Dual Channel 16 GB (2 slots of 8 GB) ( correctly seen in BIOS)
Everything working fine, all the 16GB are shown in correct slots, except ram speed is reported as 1067Mhz in the "About Mac" section.
When I had clover/mojave I had to manually set the ram speed in the smbios/memory section of clover configurator to get a correct reading. I didn't find a way to set this in opencore.
In opencore PlatformInfo/Generic I have iMacPro1,1
Any help appreciated to get the correct ram speed (2166) in MacOs.
by the way: if I overclock the ram in the BIOS to 3000Mhz, "About my mac" shows 1500 Mhz, so it really is a halfing of the actual speed (maybe it has something to do with it being dual channel ram?)
Asrock B450M Pro4
Radeon Rx570 MSI Armor 8GB
16GB DDR4 Dual Channel