Looking to put pressure on Intel once again in the high-end market, sources say AMD plans on releasing the AMD Phenom FX in mid-2009 on its new AM3 socket platform. AMD previously acknowledged that AM3 processors will work in AM2 sockets but not the reverse.

AMD is attempting to bring back their FX-line of processors in mid-2009 according to documents Tom’s Hardware saw. Although little is known about the specifications of these processors, we do know they will be based on the Deneb FX core, feature four processing engines, have shared level-three cache and be based on a 45 nm manufacturing process.

The FX-branding used by AMD in the past had represented products of unmatched performance for enthusiasts who were willing to spend a hefty premium to have the extra performance. The Athlon FX line-up was the last to use processors with the FX-branding and were in production from 2003 to 2006. The Athlon FX processors featured unlocked multipliers and offered the highest clockings of the AMD processors available.

With the great success of Intel’s Core 2 Duo processors in 2006, AMD lost the performance crown it once had held and was forced to focus on mid and entry-level offerings instead, ending production of the Althon FX. AMD continued to offer processors that featured unlocked processors with its Black Edition line-up of Athlon and Phenom processors, which were offered at a fair price for those looking for an overclockable processor and still loyal to AMD. Much the same as AMD’s FX processors, Intel’s Extreme Edition processors offer high clock rates and unlocked multipliers, with similarly high prices.

If history serves us well, these upcoming FX processors will likely carry the name AMD Phenom FX, carry with them a steep price and offer clock-speeds higher than their future mainstream brethren. Future AMD processors produced using 45nm process technology are expected to reach 3.0GHz in speed, possibly putting the AMD Phenom FX processors at over 3GHz.

As of now, the Deneb FX processor is the only "FX" label planned for 2009.