My question is the same as MSI's. The 1090T has 6 cores (there aren't any more on the chip to unlock) and it's got an unlocked multiplier. What are you trying to unlock?
EDIT: Using core unlocking features is for chips that have disabled cores, like an X2 or X3 based off of an X4 chip. There are no, repeat no disabled cores on the 1090T.