i believe its possible.
my unlock was unsuccessful but that was the processor problem. the processor itself not capable to unlock even i tried on any other motherboard.
will update u if i have time to test

isn't it obvious that it's d chip causin stability issue when ur able to blend test stable w/ 3 cores while unstable w/ 4 cores? 

same setting (ram, cpu, voltages) for blend & small fft test? 

this one probably need huge effort to try out.
let say set to per core, every core try with every %...

Hi,

Some queries here...

Try unlocking 555BE/MSI 770C45. Turn ACC on and EC Firmware to Special and all others at default and Bios V1.4. Can post and show B55x4core but failed to start Windows.

What else can I try?

Hi,

i'm using Athlon II X3 440
recently i've managed to get into windows with 4 cores
no L3 though

however, if running on 4 cores, i noticed the speed is constantly at 3GHz...won't go down to 800MHz during idle
in device manager, windows recognized only 3 B40 and 1 unknown device under processor tab
are both of these conditions normal?

also, using Biostar A770E3 mobo. this mobo supports 125W proc only. the unlocked B40 shows that the max TDP is 126W
can my mobo support this...safely?

Thanks

im using msi785GM-P45. i think can unlock. enabling ACC from bios utility?

after using OC genie II to unlock and OC my proc, i cant seem to see the core temperatures using CPUID hw monitor, coretemps and so on.. why is it like tat?

i manage to find the cpu temperature in the bios and it stated there 50+- celcius and i'm actually using noctua nh-d14. is the temp. acceptable for using such cooler??

turning on the pc and straight goes into bios, it stated 40+- celcius. i suppose that would be idle temp. after some gaming, it goes to 50+-celcius. dont dare to stress test yet as i cant see the temps..
i'm using msi mobo.. there isnt any TMPIN1.. only TMPIN0 and TMPIN2. i'm thinking is the cpu temp refers to TMPIN0 as it is almost the same as the bios.. 

but for idle temp at 40+-celcius on this massive cooler is kinda weird. maybe i have to re-seat the cooler or reapply my thermal paste.. cos i only put a small dot amount of thermal paste (without spreading it all over the proc) and put the cooler on.. is this the correct way??? blurred. 

[attachmentid=2450824]

sifus... thanks for the guide so far..

aida64 @ everest is stating 45+- on the cpu sensor. and the room temp is quite hot. the pc is in a non a/c room.

is it a normal temp for those who unlock to 4 cores? or it should be lower??
[attachmentid=2451440]

What is your temp during load?? Amd suggest below 62C.