The problem with unlocking 4 cores

In general, such a topic, until today the removal of one disk of the ozu, everything worked fine (the 4th core was unlocked). I removed 1 plate and the settings fell off, now the system again sees athlon II x3 445 (instead of x4 B45), put Unlock Cpu Core - enabled in the BIOS, saved - rebooted. But the system still sees 3 cores! What can be wrong ?

UPD: I forgot to set the Advanced Clock Calibrate parameter to Auto! Thank you all for your answers, the topic can be closed! : D