The BX2 sports a different Clock Generator from the BX1.

While the Clock Generator on the BX1 is supported by the software
Clockspeed Adjustment tool ClockGen,
the one on the BX2 is so new that the software does not support it currently.

There seems to be a lot more solder spots behind the CPU power
regulation area, probably to improve current capability and reduce heat of the
MOSFETs.