What bios version does your board have at the moment?
asus core unlocker =enabled.
Cpu core activation= manual
2nd core =on
3rd core =on
4th core =on
5th core =off
Turn off the last core and see if it boots up as a tri-core.
If it doesnt go back into bios and disable that 4th core and enable the 5th core.
Make sure the cpu v-core is set manually to 1.40v for now.
With only 3+1 vrm on your board a c2 stepping would run hotter and require a lot more voltage and they don't overclock aswell as a c3. So if buying 2nd hand check the stepping if you can.
Yeah the 955 is multiplier unlocked like your 1100t.