Those temps are out of control mate How do they compare to your first board?

A fan over the NB and PWM would certainly help, but I'd be more tempted to take off the heatpipe assembly, and check whether the thermal paste has been applied properly.

Generally these boards seem to be very good in that department, but there's always the chance of a one off.

My chipset and PWM don't go above 50c and that's taking into account warm ambients.

RLM