People i have gotten 3 types of C1 2.4b's, take a look here if u need answers

[bonkers325]

i have gotten 12/20/02 (phili), 1/20/03(costa) and 2/3/03(malay) made 2.4b retail sle6f

they all do 180fsb if your mem can do it and with at least in my opinion with a vantec aeroflow to be safe and less heat
volatges vary though, but 1 thing for sure 167fsb will run @default volatge for all

i get all my chips from googlegear ($164)so go for it, and i get my vantec aeroflow from KD computers($25)