Your Proccesor not BE (Black Edittion) cannot add multiplier (be Locked from AMD), u can OC from increase FSB , RAM ,
You have a motherboard that already cripples the HT link. Anyways, do you see anything like HT Link or so? The values will be like 1000 (200*5), 800 (200*4) etc somewhere in BIOS. For 4X multiplier, you have to set 800.