OK, you want the fake letters, er, what the hobbiest use;
A "400MHz" bus (100MHz at QDR)
B "533MHz" bus (133MHz at QDR)
G Gigahertz (means nothing, all 2.4's are 2.4GHz)
Intel has a different way of designating them, but that would just confuse everyone.
<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>