AMD today introduced the Athlon 64 4000+ and Athlon 64 FX-55, as anticipated, along with price cuts across the rest of its 64-bit desktop and desktop-replacement mobile CPU line-up.

The company also cut the prices of its mainstream Mobile Athlon 64 processors, and those of the XP-M chips. The latter saw a number of lower-end parts knocked off AMD's official price list.

Gone too is the Athlon 64 FX-53, replaced by the new, faster model. The FX-55 is available immediately, AMD said. The new Athlon 64 4000+ is clocked at 2.4GHz, like the existing 3800+, but gains a boost from its bigger L2 cache: 1MB to the 3800+'s 512KB. It too is a Socket 939 part. The 3700+ is also clocked to 2.4GHz and equipped with 1MB of L2, but its memory controller is single-channel to the 4000+'s 128-bit, dual-channel controller.

The FX-55 is clocked at 2.6GHz, up from the FX-53's 2.4GHz. ®

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