OMG I was just going to post the exact same problem, I did the same and mine shows up as 400 MHz too, but like you I can feel the difference but I want it to say 600MHz in profiler just so I can actually celebrate a job well done.
I also edited the Open firmware to no evail,,,I wonder if there's any other way to adjust the speed,,,,
let me know if you figure anything out,,,I'm starting to doubt myself and wonder if I did it right.
Xplain's use of MacNews, AppleCentral and AppleExpo are not affiliated with Apple, Inc. MacTech is a registered trademark of Xplain Corporation. AppleCentral, MacNews, Xplain, "The journal of Apple technology", Apple Expo, Explain It, MacDev, MacDev-1, THINK Reference, NetProfessional, MacTech Central, MacTech Domains, MacForge, and the MacTutorMan are trademarks or service marks of Xplain Corp. Sprocket is a registered trademark of eSprocket Corp. Other trademarks and copyrights appearing in this printing or software remain the property of their respective holders.
All contents are Copyright 1984-2010 by Xplain Corporation. All rights reserved. Theme designed by Icreon.