I would like to operate a Teensy 4.0 using external powering at 600 MHz clock speed. Please respond to the following questions:

1) What voltage do I need to operate chive the above-mentioned clock speed? My circuit has plent of current at 5 VDC

2) To operate at 600 MHz, do I need to add anything to my sketch. or will the device automatically start in 600 MHz clock speed mode? If I need to configure my sketch at startup, pleasne provide whatever lines(s) of code I need

3) I am additing the Teensy 4.0 device to my own circuit. It would be nice to have a 3D Mechanical Model of the device (with pins) purely for visualization and checking the mechanical assembly. Is there a 3D Mechanical Model of the device available (preferably in STEP format)?