The cpufreq-nforce2 driver changes the FSB on nVidia nForce2 platforms.

  This works better than on other platforms, because the FSB of the CPU

  can be controlled independently from the PCI/AGP clock.
  
  The module has two options:
  
  	fid: 	 multiplier * 10 (for example 8.5 = 85)
  	min_fsb: minimum FSB
  
  If not set, fid is calculated from the current CPU speed and the FSB.
  min_fsb defaults to FSB at boot time - 50 MHz.
  
  IMPORTANT: The available range is limited downwards!
             Also the minimum available FSB can differ, for systems 
             booting with 200 MHz, 150 should always work.