The Kenwood 72x is a true 72x cd rom, not a cdrw. I have no problems proving this drives speed, and it has been proven hundreds of times over to be the fasted cd rom drive in the world, it averages 68X+. Even though it is a 72x drive I see peaks allot of 74x with this baby. Here is a link to a product review of it.

http://www.hothardware.com/reviews/KWTX72.htm