Micros por que tanta diferencia

Hola, hace poco me compre una máquina nueva, a la cual le puse un microprocesador AMD Athlon 64 x2 de 4600, me coste 280 dólares y un micro Intel Pentium de 945 vale 215 dólares, y al parecer el Pentium de es muchísimo mejor, no lo entiendo, pongo las especificaciones.

Amd.

Specifications.

Model.

Brand AMD.

Series Athlon 64 x2.

Model ada4600cubox.

Cpu socket type.

Cpu socket type socket am2.

Tech Spec.

Core Windsor.

Multi-Core dual-Core.

Name Athlon 64 x2 4600+.

Operating frequency 2.4 GHz.

Ht 2000 Mhz.

L1 caché 128kb+128kb.

L2 caché 2 por 512 Kb.

Process type 90 nm.

Hyper-transport support yes.
64 bit support yes.

Multimedia instruction mx, se, se2, se3, 3DNow. Professional.

Voltaje 1.30 v/1.35 v.

Coling device disipador and fan.
Warranty.

Manufacturer warranty 3-year.

Intel.

Model.

Brand Intel.

Processors type desktop.

Series Pentium d.

Model bx- 80553 / 945.

Cpu socket type.

Cpu socket type LGA 775.

Tech Spec.

Core presler.

Multi-Core dual-Core.

Name Pentium d 945.

Operating frequency 3.4 GHz.

Fsb 800 Mhz.

L1 caché 24kb+32kb.

L2 caché 2 por 2mb.

Manufacturing tech 65 nm.

Vista ready yes.
64 bit support yes.

Hyper-threading support no.

Virtualization technology support no.

Multimedia instruction mx, se, se2, se3.

Voltaje 1.225v-1.312v.

Coling device disipador and fan included.