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Differences What are the advantages of each

Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

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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 l3 cache 12 MB vs 8 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 6 vs 4 2 more cores; run more applications at once
More threads 12 vs 8 4 more threads
Lower typical power consumption 48.75W vs 69.06W Around 30% lower typical power consumption
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Lower annual commercial energy cost 52.56 $/year vs 74.46 $/year Around 30% lower annual commercial energy cost
Lower annual home energy cost 14.45 $/year vs 20.48 $/year Around 30% lower annual home energy cost
Front view of Intel Xeon EC5549

Reasons to consider the
Intel Xeon EC5549

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Significantly higher clock speed 2.53 GHz vs 2.26 GHz More than 10% higher clock speed
Higher turbo clock speed 2.93 GHz vs 2.8 GHz Around 5% higher turbo clock speed

Features Key features of the Xeon L5640  vs EC5549 

clock speed

Xeon L5640
2.26 GHz
Xeon EC5549
2.53 GHz

turbo clock speed

Xeon L5640
2.8 GHz
Xeon EC5549
2.93 GHz

L2 cache

L3 cache

Xeon L5640
12 MB


Specifications Full list of technical specs


Xeon L5640  vs
Clock speed 2.26 GHz 2.53 GHz
Turbo clock speed 2.8 GHz 2.93 GHz
Cores Hexa core Quad core
Socket type
LGA 1366


Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 85W
Annual home energy cost 14.45 $/year 20.48 $/year
Annual commercial energy cost 52.56 $/year 74.46 $/year
Typical power consumption 48.75W 69.06W


Architecture QPI QPI
Number of links 2 1
Data rate 46,928 MB/s 23,480 MB/s
Transfer rate 5,860 MT/s 5,870 MT/s
Clock speed 2,930 MHz 2,935 MHz


Xeon L5640  vs
Architecture x86-64 x86-64
Threads 12 8
L2 cache 2 MB 1 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 2 2
Voltage range 0.75 - 1.35V 1 - 1.5V
Operating temperature Unknown - 69.4°C Unknown - 77.6°C

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

memory controller

Memory controller Built-in Built-in
Memory type
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 19,200 MB/s
Intel Xeon L5640
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Intel Xeon EC5549
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