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Differences What are the advantages of each

Front view of Intel Xeon L5520

Reasons to consider the
Intel Xeon L5520

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Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher clock speed 2.26 GHz vs 1.8 GHz More than 25% higher clock speed
Much better overclocked clock speed (Air) 3.42 GHz vs 1.8 GHz More than 90% better overclocked clock speed (Air)
More threads 8 vs 2 6 more threads
More cores 4 vs 2 Twice as many cores; run more applications at once
Newer Mar, 2009 vs Aug, 2006 Release date over 2 years later
Much better overclocked clock speed (Water) 4.08 GHz vs 1.8 GHz More than 2.2x better overclocked clock speed (Water)
Front view of AMD Second Generation Opteron 2210 EE

Reasons to consider the
AMD Second Generation Opteron 2210 EE

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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
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Lower typical power consumption 36.56W vs 48.75W 25% lower typical power consumption
Lower annual home energy cost 10.84 $/year vs 14.45 $/year 25% lower annual home energy cost
Lower annual commercial energy cost 39.42 $/year vs 52.56 $/year 25% lower annual commercial energy cost

Features Key features of the Xeon L5520  vs Second Generation Opteron 2210 EE 

overclocked clock speed (air)

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Xeon L5520  vs
Second Generation Opteron 2210 EE 
Clock speed 2.26 GHz 1.8 GHz
Cores Quad core Dual core
Socket type
LGA 1366
F

features

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

details

Xeon L5520  vs
Second Generation Opteron 2210 EE 
Threads 8 2
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 2 2
Clock multiplier 17 9
Voltage range 0.75 - 1.35V 1 - UnknownV

overclocking

Overclocked clock speed 3.42 GHz 1.8 GHz
Overclocked clock speed (Water) 4.08 GHz 1.8 GHz
Overclocked clock speed (Air) 3.42 GHz 1.8 GHz

power consumption

TDP 60W 45W
Annual home energy cost 14.45 $/year 10.84 $/year
Annual commercial energy cost 52.56 $/year 39.42 $/year
Typical power consumption 48.75W 36.56W
Intel Xeon L5520
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AMD Second Generation Opteron 2210 EE
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