title: Programming Drivers to Undervolt the i3/i5/i7 CPU
body: <p>There are a few utilities out there that help you <a href="http://forum.notebookreview.com/hardware-components-aftermarket-upgrades/235824-undervolting-guide.html" rel="nofollow">undervolt</a> your cpu. For the PC, for example, there is <a href="http://cpu.rightmark.org/products/rmclock.shtml" rel="nofollow">RMClock</a>. For the Mac, there is <a href="http://coolbook.se/CoolBook.html" rel="nofollow">Coolbook</a>.</p>
  
  <p>On the Cookbook website, however, it states that it is incompatible with OX X 10.7 Lion, and the i3/i5/i7 processors. I am interested in replicating the functionality of Coolbook, which works with OS X 10.6 Snow Leopard, and the Core 2 Duo processors, but for the newer OS and CPUs. I really have no idea where to start. As far as I know, Coolbook holds a monopoly on the Mac platform, and I was wondering if there is even a hackerish way of accomplishing the same functionality? What are some resources that you could point me to so I can begin understanding what is going on in the driver level when adjusting the voltage of a CPU?</p>