Are you sure it`s unclock cpu, and not unlock cpu
The unlock cpu, usually means to unlock hidden or disabled cores.
It can be good or bad, if it`s a core that`s just been hidden it can be a great free boost say paying for a dual core and getting a tri core, but if it is a 3 core that has been taken down to a 2 core because of a faulty core.
You can obviously have problems if you enable a faulty core.
You do not have any extra cores on a 1090T. The option is there for other CPUs that can have cores unlock.
So are all 6 of your cores working ?