Some Athlon II X4 Chips Mutate to Phenom II X4

The latest in AMD’s almost deliberate series of processors that unlock into powerful / more capable processors is the Athlon II X4. Some of the earliest batches of these sub-$150 quad-core processors can be converted to more powerful Phenom II X4 chips using a simple trick. When unlocked, the chip will be equipped with 6 MB L3 cache. Supposed to have been based on the “Propus” core that physically lack a L3 cache, apparently early batches continue to use the “Deneb” core with L3 cache locked (using moist threads instead of a padlock). Currently there’s no information as to which specific batches of Athlon II X4 620 and Athlon II X4 630 work. The trick works on some motherboards that support the Advanced Clock Calibration (ACC) feature. Simply set the ACC option in the BIOS setup to “Auto” from its default value of “Disabled”, and you’re done.

Source: techPowerUp!