You already have the option to unlock CPU Cores in the BIOS.
Advanced clock calibration (ACC) is a feature originally available for Phenom CPU's, particularly for Black Edition. It was later discovered that this functionality has the possibility of unlocking the supposedly disabled cores of some Phenom II X2/X3, AMD Athlon II X2/X3, and AMD Sempron locked cores / cache. (with BIOS support).
Advanced Clock Calibration
Allows you to determine whether to enable Advanced Clock Calibration when using an AMD Black
Edition CPU. We recommend that you enhance heat dissipation for the CPU VRM area if you
enable this function.
>>Disabled -- Disables this function. (Default)
>>Auto -- Lets the BIOS to configure the settings to defaults.
>>All Cores -- Configures Advanced Clock Calibration for all CPU cores.
>>Per Core -- Individually configures Advanced Clock Calibration for each CPU core.