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Differences What are the advantages of each

Front view of Intel Xeon E6540

Reasons to consider the
Intel Xeon E6540

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Much more l3 cache 18 MB vs 8 MB 2.2x more l3 cache; more data can be stored in the l3 cache for quick access later
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
More cores 6 vs 4 2 more cores; run more applications at once
More threads 12 vs 8 4 more threads
Much more l3 cache per core 3 MB/core vs 2 MB/core 50% more l3 cache per core
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Newer Mar, 2010 vs Mar, 2009 Release date a year later
Front view of Intel Xeon E5540

Reasons to consider the
Intel Xeon E5540

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Much higher clock speed 2.53 GHz vs 2 GHz More than 25% higher clock speed
Significantly higher turbo clock speed 2.8 GHz vs 2.27 GHz Around 25% higher turbo clock speed
Much better overclocked clock speed (Air) 3.57 GHz vs 2 GHz Around 80% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.45 GHz vs 2 GHz Around 2.2x better overclocked clock speed (Water)
Lower typical power consumption 65W vs 85.31W Around 25% lower typical power consumption
Lower annual commercial energy cost 70.08 $/year vs 91.98 $/year Around 25% lower annual commercial energy cost
Lower annual home energy cost 19.27 $/year vs 25.29 $/year Around 25% lower annual home energy cost

Features Key features of the Xeon E6540  vs E5540 

clock speed

Xeon E6540
2 GHz
Xeon E5540
2.53 GHz

turbo clock speed

Xeon E6540
2.27 GHz
Xeon E5540
2.8 GHz

L2 cache

L3 cache

Xeon E6540
18 MB
Xeon E5540
8 MB

overclocked clock speed (air)

Xeon E6540
2 GHz
Xeon E5540
3.57 GHz

overclocked clock speed (water)

Xeon E6540
2 GHz
Xeon E5540
4.45 GHz

Specifications Full list of technical specs

summary

Xeon E6540  vs
E5540 
Clock speed 2 GHz 2.53 GHz
Turbo clock speed 2.27 GHz 2.8 GHz
Cores Hexa core Quad core
Socket type
LGA 1567
LGA 1366

features

Has a NX bit Yes Yes
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 105W 80W
Annual home energy cost 25.29 $/year 19.27 $/year
Annual commercial energy cost 91.98 $/year 70.08 $/year
Typical power consumption 85.31W 65W

details

Xeon E6540  vs
E5540 
Threads 12 8
L2 cache 2 MB 1 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 18 MB 8 MB
L3 cache per core 3 MB/core 2 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 2 2

overclocking

Overclocked clock speed 2 GHz 3.57 GHz
Overclocked clock speed (Water) 2 GHz 4.45 GHz
Overclocked clock speed (Air) 2 GHz 3.57 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 4 2
Data rate 102,400 MB/s 46,928 MB/s
Transfer rate 6,400 MT/s 5,860 MT/s
Clock speed 3,200 MHz 2,930 MHz
Intel Xeon E6540
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Intel Xeon E5540
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