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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 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 l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
Much better overclocked clock speed (Water) 4.08 GHz vs 1.8 GHz More than 2.2x better overclocked clock speed (Water)
More threads 8 vs 6 2 more threads
Much more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Front view of AMD Opteron 4164 EE

Reasons to consider the
AMD Opteron 4164 EE

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Much more l2 cache 3 MB vs 1 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 6 vs 4 2 more cores; run more applications at once
Lower typical power consumption 28.44W vs 48.75W More than 40% lower typical power consumption
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Lower annual commercial energy cost 30.66 $/year vs 52.56 $/year More than 40% lower annual commercial energy cost
Lower annual home energy cost 8.43 $/year vs 14.45 $/year More than 40% lower annual home energy cost
Newer Jun, 2010 vs Mar, 2009 Release date over 1 years later

Features Key features of the Xeon L5520  vs Opteron 4164 EE 

clock speed

Xeon L5520
2.26 GHz
Opteron 4164 EE
1.8 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon L5520
3.42 GHz
Opteron 4164 EE
1.8 GHz

overclocked clock speed (water)

Xeon L5520
4.08 GHz
Opteron 4164 EE
1.8 GHz

Specifications Full list of technical specs

summary

Xeon L5520  vs
Opteron 4164 EE 
Clock speed 2.26 GHz 1.8 GHz
Cores Quad core Hexa core
Socket type
LGA 1366
C32

features

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

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

details

Xeon L5520  vs
Opteron 4164 EE 
Threads 8 6
L2 cache 1 MB 3 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 2 2
Clock multiplier 17 9
Voltage range 0.75 - 1.35V 0.96 - UnknownV
Operating temperature Unknown - 70°C 0 - 55°C

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 35W
Annual home energy cost 14.45 $/year 8.43 $/year
Annual commercial energy cost 52.56 $/year 30.66 $/year
Typical power consumption 48.75W 28.44W

bus

Architecture QPI HyperTransport 3.0
Clock speed 2,930 MHz 1,800 MHz
Intel Xeon L5520
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AMD Opteron 4164 EE
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