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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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Higher clock speed 2.26 GHz vs 2.13 GHz More than 5% higher clock speed
Slightly higher turbo clock speed 2.48 GHz vs 2.4 GHz Around 5% higher turbo clock speed
Much better overclocked clock speed (Water) 4.08 GHz vs 2.13 GHz More than 90% better overclocked clock speed (Water)
Front view of Intel Xeon L5518

Reasons to consider the
Intel Xeon L5518

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Much higher Maximum operating temperature 85 °C vs 70 °C More than 20% higher Maximum operating temperature
Significantly better overclocked clock speed (Air) 3.71 GHz vs 3.42 GHz Around 10% better overclocked clock speed (Air)

Features Key features of the Xeon L5520  vs L5518 

clock speed

Xeon L5520
2.26 GHz
Xeon L5518
2.13 GHz

turbo clock speed

Xeon L5520
2.48 GHz
Xeon L5518
2.4 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon L5520
3.42 GHz
Xeon L5518
3.71 GHz

overclocked clock speed (water)

Xeon L5520
4.08 GHz
Xeon L5518
2.13 GHz

Specifications Full list of technical specs

summary

Xeon L5520  vs
L5518 
Clock speed 2.26 GHz 2.13 GHz
Turbo clock speed 2.48 GHz 2.4 GHz
Cores Quad core Quad core
Socket type
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 60W
Annual home energy cost 14.45 $/year 14.45 $/year
Annual commercial energy cost 52.56 $/year 52.56 $/year
Typical power consumption 48.75W 48.75W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 25,599.99 MB/s
Maximum memory size 147,456 MB 147,456 MB

details

Xeon L5520  vs
L5518 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 45 nm
Transistor count 731,000,000 731,000,000
Max CPUs 2 2
Voltage range 0.75 - 1.35V 0.75 - 1.35V
Operating temperature Unknown - 70°C Unknown - 85°C

overclocking

Overclocked clock speed 3.42 GHz 3.71 GHz
Overclocked clock speed (Water) 4.08 GHz 2.13 GHz
Overclocked clock speed (Air) 3.42 GHz 3.71 GHz

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

bus

Architecture QPI QPI
Number of links 2 2
Data rate 46,928 MB/s 46,880 MB/s
Transfer rate 5,860 MT/s 5,860 MT/s
Clock speed 2,930 MHz 2,930 MHz
Intel Xeon L5520
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Intel Xeon L5518
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