The Core 3 change to Core 4 function cannot support all AMD CPU(Not all AMD CPU can upgrade from 3 Core CPU to 4 Core CPU). So it might caused system unstable or unable to boot up if CPU not supported. Please Clear CMOS to load default BIOS setting to resolve this problem.
You can easily access our extensive FAQ section, which is designed to swiftly address common queries and promptly resolve any issues you might encounter.