xbox v1.0 : 3944 (usa only) , 4034 , 4036 , 4627
xbox v1.1 : 4817, 4972
xbox v1.2-1.5 :5101, 5713
xbox v1.6 : 5838
If you want to know the version, goto the settings option in the XBOX menu and select information. You will see lots of legal text.
If there's no kernel version written you have a 3944.
Else it's will be clearly written which kernel you have.
Updated for newer xbox's 12/08/03 -heinrich
Updated again 5/24/04 - brahm2
Edited by brahm2, 24 May 2004 - 05:26 PM.