Though identical in appearance the Evercool Transformer 4 HPJ-12025 (2010 ed.) heatsink is actually a revised and updated version of the Transformer 4 HPJ-12025 cooler Frostytech tested in 2009. Chief among the differences is an up to date mounting bracket that accommodates the full range of Intel processors (socket 775/1155/1156/1366) in addition to the full gamut of AMD chips (socket 754/939/940/AM2/AM3). The 2nd revision HPJ-12025 heatsink Frostytech is testing today has been fitted with faster fans that operate at 2200-1000RPM and are now PWM compliant - the fans on the previous heatsink ran at a fixed 1000RPM.