Hidden Devices Drivers
If you do clone your current system disk and put it into your new PC, windows will do the (mostly) right thing and add required drivers. It will NOT remove the old drivers though, So, In the Device manager, select view->show hidden devices and expand every entry in the list, remove any greyed out devices and their drivers (for example the old CPU cores under Processors.
That should obviate strange crashes / BSOD caused by conflicting device drivers (he said from experience).
Skylimey