Intel's first 64-bit Pentium 4 microprocessors were quietly added to the company's price lists on Sunday, heralding their entrance into the marketplace.
Four versions of the Intel Pentium 4 6XX series were announced at speeds up to 3.6-GHz, a frequency grade lower than the existing 5XX series. Prices will range from $224 to $605. Intel also added the 3.73-GHz Pentium 4 Extreme Edition to its lineup, a $999 chip that is fabricated on a finer 90-nm process than its older 130-nm P4EE components.
In addition to the Intel's 64-bit EM64T support, the new Pentium 4 chips also support the Execute Disable Bit, an additional megabyte of level-2 cache, and the Enhanced SpeedStep capability included on Intel's mobile processors. On the other hand, rival AMD began shipping its first 64-bit Athlon 64 processors in September of 2003, almost 18 months ago.
The 6XX series will likely be the last major enhancement to the Pentium 4 line before the introduction of the Pentium D "Smithfield," Intel's first dual-core part.
Full Story .