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Differences What are the advantages of each

Front view of Intel Xeon E5-2620 v3

Reasons to consider the
Intel Xeon E5-2620 v3

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Much more l3 cache 15 MB vs 6 MB 2.5x more l3 cache; more data can be stored in the l3 cache for quick access later
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
More cores 6 vs 4 2 more cores; run more applications at once
More threads 12 vs 4 Three times as many threads
Newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l3 cache per core 2.5 MB/core vs 1.5 MB/core More than 65% more l3 cache per core
Newer Jul, 2014 vs Feb, 2009 Release date over 5 years later
Better overclocked clock speed (Water) 2.87 GHz vs 2.8 GHz Almost the same
Front view of AMD Opteron 2387

Reasons to consider the
AMD Opteron 2387

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Much higher clock speed 2.8 GHz vs 2.4 GHz More than 15% higher clock speed
Lower typical power consumption 60.94W vs 69.06W More than 10% lower typical power consumption
Better overclocked clock speed (Air) 2.8 GHz vs 2.66 GHz More than 5% better overclocked clock speed (Air)
Lower annual home energy cost 18.07 $/year vs 20.48 $/year More than 10% lower annual home energy cost
Lower annual commercial energy cost 65.7 $/year vs 74.46 $/year More than 10% lower annual commercial energy cost

Features Key features of the Xeon E5-2620 v3  vs Opteron 2387 

clock speed

Xeon E5-2620 v3
2.4 GHz
Opteron 2387
2.8 GHz

L3 cache

overclocked clock speed (air)

Xeon E5-2620 v3
2.66 GHz
Opteron 2387
2.8 GHz

overclocked clock speed (water)

Xeon E5-2620 v3
2.87 GHz
Opteron 2387
2.8 GHz

Specifications Full list of technical specs

summary

Xeon E5-2620 v3  vs
Opteron 2387 
Clock speed 2.4 GHz 2.8 GHz
Cores Hexa core Quad core
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
AVX
SSE3
SSE
3DNow!
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 85W 75W
Annual home energy cost 20.48 $/year 18.07 $/year
Annual commercial energy cost 74.46 $/year 65.7 $/year
Typical power consumption 69.06W 60.94W

details

Xeon E5-2620 v3  vs
Opteron 2387 
Threads 12 4
L3 cache 15 MB 6 MB
L3 cache per core 2.5 MB/core 1.5 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 2 2
Operating temperature Unknown - 72.6°C 0 - 55°C

overclocking

Overclocked clock speed 2.66 GHz 2.8 GHz
Overclocked clock speed (Water) 2.87 GHz 2.8 GHz
Overclocked clock speed (Air) 2.66 GHz 2.8 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 HyperTransport 3.0
Clock speed 4,000 MHz 2,200 MHz
Intel Xeon E5-2620 v3
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AMD Opteron 2387
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