Speed ratings of storage cards

A reader sent in a question about the speed ratings on the different storage cards, like CF and etc. Here's the breakdown:

Manufacturers use 150KBs as the baseline (1x = 150KBs).
133X = 20 MBs
200X = 30 MBs
266X = 40 MBs
300X = 45 MBs
400X = 60 MBs
600X = 90 MBs

Enjoy.