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Differences What are the advantages of each

Front view of Intel Xeon E5520

Reasons to consider the
Intel Xeon E5520

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Much higher clock speed 2.26 GHz vs 1.6 GHz More than 40% higher clock speed
More cores 4 vs 2 Twice as many cores; run more applications at once
Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
More threads 8 vs 4 Twice as many threads
Lower typical power consumption 65W vs 84.5W Around 25% lower typical power consumption
Lower annual commercial energy cost 70.08 $/year vs 91.1 $/year Around 25% lower annual commercial energy cost
Lower annual home energy cost 19.27 $/year vs 25.05 $/year Around 25% lower annual home energy cost
Front view of Intel Itanium 2 9052

Reasons to consider the
Intel Itanium 2 9052

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Much more l3 cache 24 MB vs 8 MB 3x more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l3 cache per core 12 MB/core vs 2 MB/core 6x more l3 cache per core
Much 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
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration

Features Key features of the Xeon E5520  vs Itanium 2 9052 

clock speed

Xeon E5520
2.26 GHz
Itanium 2 9052
1.6 GHz

L2 cache

L3 cache

TDP

Specifications Full list of technical specs

summary

Xeon E5520  vs
Itanium 2 9052 
Clock speed 2.26 GHz 1.6 GHz
Cores Quad core Dual core

features

Has a NX bit Yes No
Has virtualization support Yes Yes

power consumption

TDP 80W 104W
Annual home energy cost 19.27 $/year 25.05 $/year
Annual commercial energy cost 70.08 $/year 91.1 $/year
Typical power consumption 65W 84.5W

details

Xeon E5520  vs
Itanium 2 9052 
Threads 8 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 8 MB 24 MB
L3 cache per core 2 MB/core 12 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 2 4

bus

Clock speed 2,930 MHz 533 MHz
Intel Xeon E5520
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Intel Itanium 2 9052
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