Intel® Pentium® Processor Extreme Edition 955 (3.46 GHz).

4M Cache, 3.46 GHz, 1066 MHz FSB, Dual Core with 4 Threads. Socket 775. 130W.

Intel S-Spec: SL9K6

Intel's fastest consumer CPU of 2005. These cost $1000 at launch. Rare & collectable CPU (probably only one for sale on ebay?)

Working.