I have understood the N9 processor could be put in N900. They are that close (check the models). It was just that it should be configured in the flashing image for device to know how to use that. I bet it could be checked from the N9 image what would need to be changed to what. But they should be swappable if I am correct and I usually am. The difficult part is to put the balls to right placed before heating the processor in place. They are that small.