Hi EF, NB volts is 1.52 in the bios - not sure if that is VMCH ?.

I have used the larger optional heat sinks as supplied and used AS5 on those but did not remove the whole heat pipe assembly which I did on my SIIE and probably should have done here. The thermal tape in question is under the heatsinks that have the red metal cap on them so maybe I have the incorrect name for those chips.

Thanks for your help