What is the main difference between PCB V1.0 and V2.0 on A890GXM-A?
The main difference between V1.0 and V2.0 on A890GXM-A is that V2.0 can support "CPU Unlock" feature which allow to enable AMD specified 2/3 cores CPU to 4 cores. You can enable "CPU Unlock" item under M.I.B. III(MB Intelligent BIOS III) from BIOS setup menu. Version 1.0 does not support this feature.
help_outline
When you try to set "CPU Frequency Control" by "Manual" under M.I.B. III in BIOS setup, the CPU frequency will back to 800MHz while adjusting it manually.
Please download the BIOS as following and update to fix it.