PowerLogix CPU Director for Mac

From Other World Computing:

CPU Director allows you to view and configure the cache and processor clock speed settings on your PowerLogix upgrade card. The included utilities allow you to enable or disable the cache "on the fly", change the speed at which your backside cache operates and automatically enable the cache at this speed at boot time. If your upgrade uses an IBM 750FX or 750GX processor, you can also change the processor clock speed "on the fly" as well as the speed at which to set the processor when rebooting. There are also options to disable speculative access (a problem with OldWorld machines that originally did not ship with a G3 or G4 processor) and enable dynamic power management. Finally, if your upgrade uses multiple-processors, and you are running Mac OS X, you can view and change these settings on a per-processor basis.