The most traditional acc open core, acc is amd's technology to optimize processor overclocking, I do not know whether it is intentional or accidental, can open the processor core that is shielded, making it possible for amd to open the core, but acc Settings are relatively complex, and not all versions of the bios acc can open the core. You need a dedicated core-open bios to do that.
In the era of so-called 8-series chipsets, amd has shielded acc technology, but many manufacturers have developed the ucc option, which is simpler to set up, just choose to turn it on or off.