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Differences What are the advantages of each

Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More threads 8 vs 3 5 more threads
More cores 4 vs 3 1 more cores; run more applications at once
Front view of AMD Athlon II X3 2.6 GHz

Reasons to consider the
AMD Athlon II X3 2.6 GHz

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Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Higher clock speed 2.6 GHz vs 2.4 GHz Around 10% higher clock speed
Significantly more l2 cache per core 0.67 MB/core vs 0.25 MB/core Around 2.8x more l2 cache per core

Features Key features of the Xeon E5620  vs Athlon II X3 2.6 GHz 

clock speed

L2 cache

Specifications Full list of technical specs

summary

Xeon E5620  vs
Athlon II X3 2.6 GHz 
Clock speed 2.4 GHz 2.6 GHz
Cores Quad core Tri core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

details

Xeon E5620  vs
Athlon II X3 2.6 GHz 
Threads 8 3
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.67 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 2 1

power consumption

Typical power consumption 65W N/A

bus

Clock speed 2,930 MHz 2,000 MHz
Intel Xeon E5620
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AMD Athlon II X3 2.6 GHz
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