A triple nand slim is an RGH'd (Reset Glitch Hacked) Trinity (slim) Xbox that has a Matrix Trident chip inside the console. If you've ever heard of a Cygnos chip, it's like that but instead of having the ability to switch between your RGH or Retail nand side, you are able to switch between three nands (e.g. RGH, Retail (Xbox Live), Xecuter Fusion).

Here's a thread on JTAG's and RGH's for beginners. I suggest if you are considering buying one, you should read this over a couple of times:
Forums/t=791843/beginners-guide-t...-2011.html

pvtpunchu wrote A triple nand slim is an RGH'd (Reset Glitch Hacked) Trinity (slim) Xbox that has a Matrix Trident chip inside the console. If you've ever heard of a Cygnos chip, it's like that but instead of having the ability to switch between your RGH or Retail nand side, you are able to switch between three nands (e.g. RGH, Retail (Xbox Live), Xecuter Fusion).

Here's a thread on JTAG's and RGH's for beginners. I suggest if you are considering buying one, you should read this over a couple of times:
Forums/t=791843/beginners-guide-t...-2011.html

Look at this smart camper we have here.

Rainbow-ModZ wrote Is it a jtag with xex menu as well

A triple nand allows you to run 3 different types of dashboards You could have one that runs normally (retail), one running Freestyle dash (FSD: In my opinion is the best), and one running Linux.

The way you can switch what nand you want to run is how you turn the xbox on.
Example: Holding controller connection button, then tapping the on button.