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Differences What are the advantages of each

Front view of Intel Xeon E7520

Reasons to consider the
Intel Xeon E7520

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More threads 8 vs 4 Twice as many threads
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration
Newer Mar, 2010 vs Nov, 2007 Release date over 2 years later
Front view of Intel Xeon E5430

Reasons to consider the
Intel Xeon E5430

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Much more l2 cache 12 MB vs 1 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 2.66 GHz vs 1.87 GHz More than 40% higher clock speed
Much more l2 cache per core 3 MB/core vs 0.25 MB/core 12x more l2 cache per core
Much better overclocked clock speed (Air) 3.39 GHz vs 1.87 GHz More than 80% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.07 GHz vs 1.87 GHz Around 2.2x better overclocked clock speed (Water)
Lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
Lower annual commercial energy cost 70.08 $/year vs 83.22 $/year More than 15% lower annual commercial energy cost
Lower annual home energy cost 19.27 $/year vs 22.89 $/year More than 15% lower annual home energy cost

Features Key features of the Xeon E7520  vs E5430 

clock speed

Xeon E7520
1.87 GHz
Xeon E5430
2.66 GHz

L2 cache

Xeon E7520
1 MB
Xeon E5430
12 MB

overclocked clock speed (air)

Xeon E7520
1.87 GHz
Xeon E5430
3.39 GHz

overclocked clock speed (water)

Xeon E7520
1.87 GHz
Xeon E5430
4.07 GHz

TDP

Specifications Full list of technical specs

summary

Xeon E7520  vs
E5430 
Clock speed 1.87 GHz 2.66 GHz
Cores Quad core Quad core
Socket type
LGA 1567
LGA 771

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 95W 80W
Annual home energy cost 22.89 $/year 19.27 $/year
Annual commercial energy cost 83.22 $/year 70.08 $/year
Typical power consumption 77.19W 65W

details

Xeon E7520  vs
E5430 
Threads 8 4
L2 cache 1 MB 12 MB
L2 cache per core 0.25 MB/core 3 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 4 2
Voltage range 0.68 - 1.35V 0.85 - 1.35V
Operating temperature Unknown - 70°C Unknown - 67°C

overclocking

Overclocked clock speed 1.87 GHz 3.39 GHz
Overclocked clock speed (Water) 1.87 GHz 4.07 GHz
Overclocked clock speed (Air) 1.87 GHz 3.39 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 FSB
Number of links 4 1
Clock speed 2,400 MHz 1,333 MHz
Intel Xeon E7520
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Intel Xeon E5430
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