Attached is a slightly modified 691mhz boot.img for CM6.1 in an installable format. All you need to do is to make a nandroid backup, and then install this zip in Recovery. Of course if you want to have the most accurate measure, you will need to charge your phone to 100% and wipe the battery stats in Recovery, or install Battery Calibrator from the Market. Maybe it wouldn't hurt to wipe cache, but I'm not sure.
I found after running this boot.img for a short time that my CPU had a much higher percentage of time at the lowest setting. This makes sense since the phone is in screen-off mode most of the time. (But previously this was not true for me.) Could this be the "battery drain" issue some people have reported with the CM6.1 roms? I can't say for sure yet, but I'd appreciate it if anyone would help test my theory. Please give feedback as soon as you have any.
Incidentally, the default speed is 614mhz, the same as the previous OC boot.img used in the "Basic" rom I made and the CM Plus rom Antonio made. It should be able to be used in either of those two roms just fine.
Here is the file: CM61-OCbootimg-TWfix614.zip 2.43MB 176 downloads
Edited by twrock, 13 September 2011 - 02:03 AM.