Thank you all.
I had thought the OC module is kind of "overclockable" module that users have to set the actual speed after boot via config file or applications such as setcpu.
But the fact is that the module is already overclocked so as to run at 1.1GHz by default.
And unfortunately my cpu can't afford to run at 1.1GHz, so it doesn't even boot up with OC module.
This is not true.
First you need to access cpugovernor.config with a rooted file and text manager and change enable_overclock=0 to enable_overclock=1
Then you need a rooted terminal app to run the command "etc/uruk.d/cpugovernor stats". This will confirm that Overclock is Enabled.
Then you can use the same rooted terminal app to run the commands "echo 66 > /proc/overclock/max_vsel" and "echo 1100000 > /proc/overclock/max_rate" to temporarily set the cpu voltage and frequency. If you screw up a reboot will get you back to the default. I am currently running 68 and 1100000 which is stable for my A70.
Last! Once you settle on STABLE overclock settings you can use your rooted file and text manager and change cpugovernor.config file to uncomment the vsel and rate lines and put in your stable numbers. Now you will have overclock on reboot. Also now when you enter setcpu the max will be 1100000 (or what ever) and the 2 slower speeds will be displayed.
Of course you can read http://code.google.com/p/urukdroid/wiki ... pugovernor
for this information. It was not easy for me at first to figure out but I did (and I'm a noobee).