Just the AMD Black Edition series processors are multiplier-unlocked .If you install non Black Edition CPU on this board ,you cannot see the settings of NB Frequency, CPU Voltage and Multiplier in BIOS .With Black Edition CPU on this board .You can access “M.I.B(MB Intelligent BIOS)” in BIOS to set the clock speed and system bus for your system .You can refer to the manual (Page 49) from the following website for more information about overclock setting .
Please visit the following AMD website to confirm if your CPU is Black Edition CPU.