Computerhilfen.com: What is AMD 64 Athlon x 2 Mean

What is a AMD (http://www.computerhilfen.com/explanation-a-AMD.html) Athlon (http://www.computerhilfen.com/explanation-a-Athlon.html) 64x2 Processor (http://www.computerhilfen.com/explanation-p-Processor.html) from Gateway (http://www.computerhilfen.com/explanation-g-Gateway.html) ?
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  Jim.

The Athlon (http://www.computerhilfen.com/explanation-a-Athlon.html) 64 X2 is the first dual-core desktop (http://www.computerhilfen.com/explanation-d-Desktop.html) CPU (http://www.computerhilfen.com/explanation-c-CPU.html) manufactured by AMD. (http://www.computerhilfen.com/explanation-a-AMD.html) It is essentially a processor (http://www.computerhilfen.com/explanation-p-Processor.html) consisting of two Athlon (http://www.computerhilfen.com/explanation-a-Athlon.html) 64 cores joined together on one die with additional control logic. The cores share one dual-channel memory controller, (http://www.computerhilfen.com/explanation-c-Controller.html) are based on the E-stepping model of Athlon (http://www.computerhilfen.com/explanation-a-Athlon.html) 64 and, depending on the model, have either 512 or 1024 KiB of L2 Cache (http://www.computerhilfen.com/explanation-c-Cache.html) per core. The Athlon (http://www.computerhilfen.com/explanation-a-Athlon.html) 64 X2 is capable of decoding SSE3 instructions (except those few specific to Intel's architecture), so it can run and benefit from software (http://www.computerhilfen.com/explanation-s-Software.html) optimizations that were previously only supported by Intel chips. This enhancement is not unique to the X2, and is also available in the Venice and San Diego single core Athlon (http://www.computerhilfen.com/explanation-a-Athlon.html) 64s.

In June 2007, AMD (http://www.computerhilfen.com/explanation-a-AMD.html) released low-voltage variants of their low-end 65 nm Athlon (http://www.computerhilfen.com/explanation-a-Athlon.html) 64 X2, named "Athlon X2"[1]. The Athlon (http://www.computerhilfen.com/explanation-a-Athlon.html) X2 processors feature reduced TDP of 45 W [2].

full explaination here
http://en.wikipedia.org/wiki/Athlon_64_X2