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Differences What are the advantages of each

Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Much more l3 cache 12 MB vs 4 MB 3x more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
Significantly newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Air) 3.75 GHz vs 3 GHz More than 25% better overclocked clock speed (Air)
Much more l3 cache per core 3 MB/core vs 2 MB/core 50% more l3 cache per core
Much better overclocked clock speed (Water) 4.33 GHz vs 3 GHz Around 45% better overclocked clock speed (Water)
Lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
Newer Mar, 2010 vs Aug, 2006 Release date over 3 years later
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
Front view of Intel Xeon 7120N

Reasons to consider the
Intel Xeon 7120N

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Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3 GHz vs 2.4 GHz More than 25% higher clock speed
Supports more CPUs in SMP configuration 32 vs 2 30 supports more CPUs in SMP configuration
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core

Features Key features of the Xeon E5620  vs 7120N 

clock speed

Xeon E5620
2.4 GHz
Xeon 7120N
3 GHz

L2 cache

L3 cache

Xeon E5620
12 MB
Xeon 7120N
4 MB

overclocked clock speed (air)

Xeon E5620
3.75 GHz
Xeon 7120N
3 GHz

overclocked clock speed (water)

Xeon E5620
4.33 GHz
Xeon 7120N
3 GHz

TDP

Specifications Full list of technical specs

summary

Xeon E5620  vs
7120N 
Clock speed 2.4 GHz 3 GHz
Cores Quad core Dual core
Socket type
LGA 1366
604

features

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

power consumption

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

bus

Architecture QPI FSB
Number of links 2 1
Clock speed 2,930 MHz 667 MHz

details

Xeon E5620  vs
7120N 
Architecture x86-64 x86-64
Threads 8 4
L2 cache 1 MB 4 MB
L2 cache per core 0.25 MB/core 2 MB/core
L3 cache 12 MB 4 MB
L3 cache per core 3 MB/core 2 MB/core
Manufacture process 32 nm 65 nm
Max CPUs 2 32
Clock multiplier 18 18
Voltage range 0.75 - 1.35V 1.1 - 1.35V
Operating temperature Unknown - 77.6°C Unknown - 60°C

overclocking

Overclocked clock speed 3.75 GHz 3 GHz
Overclocked clock speed (Water) 4.33 GHz 3 GHz
Overclocked clock speed (Air) 3.75 GHz 3 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
Intel Xeon E5620
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Intel Xeon 7120N
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