I can confirm that P02A_C106.60A runs at 1600mhz by default and that P02A_C106.60D runs at 1066mhz, I just upgraded my BIOS
the odd thing was that the icestorm benchmark still ran around 13000 @ 1066mhz, but only for the first run, anything after that will be slower and I think it’s the cpu/gpu throttling.
I’ve changed the BIOS setting to 1600mhz and it runs normal again, had one icestorm benchmark that was over 17000
I just hope things are stable now