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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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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much more l3 cache 15 MB vs 8 MB Around 90% more l3 cache; more data can be stored in the l3 cache for quick access later
Much better PassMark score 9,977 vs 5,401 Around 85% better PassMark score
Much better PassMark (Single core) score 1,683 vs 1,306 Around 30% better PassMark (Single core) score
Much better performance per watt 12.6 pt/W vs 1.62 pt/W More than 7.8x better performance per watt
More threads 12 vs 6 Twice as many threads
Much more l3 cache per core 2.5 MB/core vs 1.33 MB/core Around 90% more l3 cache per core
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Jul, 2014 vs Dec, 2012 Release date over 1 years later
Front view of AMD Opteron 4332 HE

Reasons to consider the
AMD Opteron 4332 HE

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Much higher clock speed 3 GHz vs 2.4 GHz More than 25% higher clock speed
Significantly higher turbo clock speed 3.7 GHz vs 3.2 GHz More than 15% higher turbo clock speed
Much better overclocked clock speed (Air) 3 GHz vs 2.66 GHz Around 15% better overclocked clock speed (Air)
Lower typical power consumption 52.81W vs 69.06W Around 25% lower typical power consumption
Lower annual commercial energy cost 56.94 $/year vs 74.46 $/year Around 25% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 20.48 $/year Around 25% lower annual home energy cost
Better overclocked clock speed (Water) 3 GHz vs 2.87 GHz Around 5% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5-2620 v3 vs Opteron 4332 HE

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-2620 v3
2,750,000 MB/s
Opteron 4332 HE
1,700 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-2620 v3  vs
Opteron 4332 HE 
Clock speed 2.4 GHz 3 GHz
Turbo clock speed 3.2 GHz 3.7 GHz
Cores Hexa core Hexa core
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
AVX
SSE3
SSE
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 85W 65W
Annual home energy cost 20.48 $/year 15.66 $/year
Annual commercial energy cost 74.46 $/year 56.94 $/year
Performance per watt 12.6 pt/W 1.62 pt/W
Typical power consumption 69.06W 52.81W

bus

Architecture QPI HyperTransport 3.0
Transfer rate 8,000 MT/s 6,400 MT/s
Clock speed 4,000 MHz 3,200 MHz

details

Xeon E5-2620 v3  vs
Opteron 4332 HE 
Threads 12 6
L3 cache 15 MB 8 MB
L3 cache per core 2.5 MB/core 1.33 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 2 2
Operating temperature Unknown - 72.6°C Unknown - 68°C

overclocking

Overclocked clock speed 2.66 GHz 3 GHz
Overclocked clock speed (Water) 2.87 GHz 3 GHz
Overclocked clock speed (Air) 2.66 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3
DDR
Channels Quad Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 6,400 MB/s 12,800 MB/s
Intel Xeon E5-2620 v3
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AMD Opteron 4332 HE
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