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Differences What are the advantages of each

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 77.6 °C Around 10% higher Maximum operating temperature
Lower typical power consumption 48.75W vs 65W 25% lower typical power consumption
Lower annual commercial energy cost 52.56 $/year vs 70.08 $/year Around 25% lower annual commercial energy cost
Lower annual home energy cost 14.45 $/year vs 19.27 $/year Around 25% lower annual home energy cost
Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Significantly higher clock speed 2.4 GHz vs 2.13 GHz Around 15% higher clock speed
Much more l3 cache 12 MB vs 8 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Higher turbo clock speed 2.66 GHz vs 2.4 GHz More than 10% higher turbo clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Supports more RAM 294,912 MB vs 147,456 MB Supports 2x more RAM
Much better overclocked clock speed (Water) 4.33 GHz vs 2.13 GHz More than 2x better overclocked clock speed (Water)
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l3 cache per core 3 MB/core vs 2 MB/core 50% more l3 cache per core
Slightly better overclocked clock speed (Air) 3.75 GHz vs 3.71 GHz Almost the same
Newer Mar, 2010 vs Mar, 2009 Release date 11 months later

Features Key features of the Xeon L5518  vs E5620 

clock speed

Xeon L5518
2.13 GHz
Xeon E5620
2.4 GHz

turbo clock speed

Xeon L5518
2.4 GHz
Xeon E5620
2.66 GHz

L2 cache

L3 cache

Xeon L5518
8 MB
Xeon E5620
12 MB

overclocked clock speed (air)

Xeon L5518
3.71 GHz
Xeon E5620
3.75 GHz

overclocked clock speed (water)

Xeon L5518
2.13 GHz
Xeon E5620
4.33 GHz

Specifications Full list of technical specs


Xeon L5518  vs
Clock speed 2.13 GHz 2.4 GHz
Turbo clock speed 2.4 GHz 2.66 GHz
Cores Quad core Quad core
Socket type
LGA 1366


Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 80W
Annual home energy cost 14.45 $/year 19.27 $/year
Annual commercial energy cost 52.56 $/year 70.08 $/year
Typical power consumption 48.75W 65W

memory controller

Memory controller Built-in Built-in
Memory type
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 294,912 MB


Xeon L5518  vs
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 12 MB
L3 cache per core 2 MB/core 3 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 2 2
Voltage range 0.75 - 1.35V 0.75 - 1.35V
Operating temperature Unknown - 85°C Unknown - 77.6°C


Overclocked clock speed 3.71 GHz 3.75 GHz
Overclocked clock speed (Water) 2.13 GHz 4.33 GHz
Overclocked clock speed (Air) 3.71 GHz 3.75 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


Architecture QPI QPI
Number of links 2 2
Data rate 46,880 MB/s 46,928 MB/s
Transfer rate 5,860 MT/s 5,860 MT/s
Clock speed 2,930 MHz 2,930 MHz
Intel Xeon L5518
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Intel Xeon E5620
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