The AMD Phenom family is a 64-bit microprocessor family from Advanced Micro Devices (AMD), based on the K10 microarchitecture.
An improved second generation was released in December 2008, named Phenom II.
Processors with a "u" following the model number (e.g., 270u) are ultra-low-power models, usually 20 W for single core chips or 25 W for dual core chips.
AMD released a limited edition Deneb-based processor to extreme overclockers and partners.
The "42" officially represents four cores running at 2 GHz, but is also a reference to the answer to life, the universe, and everything from The Hitchhiker's Guide to the Galaxy.