Overclocking with BCLK isn't a good idea, generally.
It could cause damage to CPU, PCIe cards, North Bridge, RAM., etcc whatever is connected on Motherboard, basically.
But, most of the time this wouldn't happen. Especially if you have a super high end motherboard.
Motherboards in laptop are like "there" for CPU to work and support other basic stuff. I guess that's why they don't include BCLK in any of it.