T-bred/Barton unlocking for easier under/overclocking

Lost Circuits has an article on an easy way to unlock the multipliers of a AMD Athlon Thoroughbred or Barton. While multiplier unlocking is a common trick to overclock a CPU, it can be equally applied to underclocking for lower temperatures and easier silencing.

Click for unlocking article at Lost Circuits
Click for SPCR's Primer on underclocking and undervolting