Macbook only throttles down to 1.5Ghz?

[huong23]

I have a Macbook (White, Core Duo 2Ghz) and it seems to me that the CPU frequency from CoreDuo Temp never goes below 1.5Ghz on idle. On my Dell Inspiron 8600 (Pentium-M Banias 1.5Ghz) it will clock down to 600Mhz when idle. This Macbook won't go any lower than 1.5Ghz on idle and it's putting out a lot of heat. Is there a way to dynamically clock the Core Duo 2.0Ghz down to at least 1Ghz or even lower...provided that OS X is idle? I really miss having a utility like RMclock on my Dell laptop. It allowed me to define the dynamic clock switching threshold and undervolting of my processor. Is there a similar utility for OS X that will do dynamic clock switching and undervolting?

 

Thanks.