Need help unlocking the the additional core on Phenom IIx4 960t ?

so got the Asus M4A88T-M mobo it supports cpus upto 140 watts , have a 620 watts power supply . so as the pc reboots i get the option to press 4 and unlock the additional cores , i follow the instructions nad the thing reboots and shows that 6 cores have be activated than as i get to the windows loading screen it reboots and just loops lik this . i have accessed the bios and shows that all 6 cores are active but it does not show the nace of the CPU . so help me out guys what i am doing room , and running it on stock speed . and know there is a 50/50 chance of unlocking the cores but it shouldn't show in bios if the extra 2 cores have been activated or not right ?

Thanks .