Halo 3 version is using Halo chipset.

to know it's a falcon set:

- check the box for the LOT Number. If it's > 734 then it's falcon
- the power brick supply must be 175w
- check the console, it should made by November 2007 and above.

the halo LE that i have comes with a zephyr chipset. so ya, to answer your question, it's no guarantee that if you purchase a halo LE console, you will def get a falcon chipset... instead, check the lot number, assembly team and the voltage on the sticker...or if you can pry the console out of the box somehow and if they let you, try inspecting the interior of the console for your falcon chipset. hope this helps.

and to further add,

doesn't mean you get a falcon chipset, doesn't mean you won't get 3ROD anymore