xbox version

How do i determine the version of my xbox? i am looking to install a chip cause i unlocked my hd and now when i boot it boots to error 5 so i want to install a chip into it to see if that would work or not but am not sure what version box i have and what chip to put in or where to get it from. any help will be appreciated thanx

 

Go here
http://www.xbox-scene.com/versions.php

 

This is all modchips. Read and pick one for you
http://www.xbox-scene.com/modchips.php