I dont know which Xbox version I have. The MFG date is 2005/04/13, so I guess it should be a 1.6 . It is modded with an Aladdin and the bios is EvoX. well i dont know if you need to reformat your drive,seeing as bendermameox loads up the games quicker.but anyway seeing as you xbox is chipped you could just download the slayers auto installer disc 2.7. with this disc you can basically reformat your xbox hdd.just dont go ahead and reformat your hdd just yet as that miht not be the problem.