what's the "J" mean?

[NeoLogic]

Looking to purchase a new CPU, and I have searched everything from this forum, to google, yet I can't find out the difference between an LGA 775 530, and an LGA 775 530J other than price. Does anybody know. I heard something about anti-malaware built in the chip when used in conjunction with XP Pro SP2, is this true?

Thanks

 

[Dr.Evil]

it has the No execute bit the A64's have

 

[gwai lo]

well..it has some other stuff along with that...google for E0 stepping