All you will need to count your inductor rings are hands and a good flashlight.

1: Remove your Hard Disk Drive from the top of your console and set aside so as to not damage it.

2: Place the console vertical and upside-down on a flat surface, so the bottom grill of the console is visible.

3: Put your flashlight directly up against the console's bottom grill and look for the 2 or 3 inductor rings (which appear as a small ring wrapped in bare copper wire).

Two rings laying flat: Congratulations! You have a Falcon board.
Three rings laying flat: This is a Zephyr motherboard.
Three rings standing up: This is a launch motherboard.

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