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Differences What are the advantages of each

Front view of Intel Xeon E5 2620 v2

Reasons to consider the
Intel Xeon E5 2620 v2

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Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 65W vs 80.44W Around 20% lower typical power consumption
Lower annual commercial energy cost 70.08 $/year vs 86.72 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 19.27 $/year vs 23.85 $/year Around 20% lower annual home energy cost
Front view of AMD Opteron 6338P

Reasons to consider the
AMD Opteron 6338P

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Much more l2 cache 12 MB vs 1.5 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly higher clock speed 2.3 GHz vs 2.1 GHz Around 10% higher clock speed
Higher turbo clock speed 2.8 GHz vs 2.6 GHz Around 10% higher turbo clock speed
More l3 cache 16 MB vs 15 MB More than 5% more l3 cache; more data can be stored in the l3 cache for quick access later
Much better overclocked clock speed (Air) 2.8 GHz vs 2.25 GHz Around 25% better overclocked clock speed (Air)
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration
Much better overclocked clock speed (Water) 2.8 GHz vs 2.1 GHz Around 35% better overclocked clock speed (Water)
Newer Jan, 2014 vs Jul, 2013 Release date 6 months later

Features Key features of the Xeon E5 2620 v2  vs Opteron 6338P 

clock speed

Xeon E5 2620 v2
2.1 GHz
Opteron 6338P
2.3 GHz

turbo clock speed

Xeon E5 2620 v2
2.6 GHz
Opteron 6338P
2.8 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E5 2620 v2
2.25 GHz
Opteron 6338P
2.8 GHz

overclocked clock speed (water)

Xeon E5 2620 v2
2.1 GHz
Opteron 6338P
2.8 GHz

Specifications Full list of technical specs

summary

Xeon E5 2620 v2  vs
Opteron 6338P 
Clock speed 2.1 GHz 2.3 GHz
Turbo clock speed 2.6 GHz 2.8 GHz
Cores Hexa core Dodeca core
Socket type
LGA 2011
G34
Is unlocked No No

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
SSE4
XOP
AVX
SSE3
SSE
ABM
BMI1
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 99W
Annual home energy cost 19.27 $/year 23.85 $/year
Annual commercial energy cost 70.08 $/year 86.72 $/year
Typical power consumption 65W 80.44W

bus

Transfer rate 7,200 MT/s 6,400 MT/s
Clock speed 3,600 MHz 3,200 MHz

details

Xeon E5 2620 v2  vs
Opteron 6338P 
Architecture x86-64 x86-64
Threads 12 12
L2 cache 1.5 MB 12 MB
L3 cache 15 MB 16 MB
Manufacture process 22 nm 32 nm
Max CPUs 2 4
Clock multiplier 21 17
Operating temperature Unknown - 71°C Unknown - 69°C

overclocking

Overclocked clock speed 2.25 GHz 2.8 GHz
Overclocked clock speed (Water) 2.1 GHz 2.8 GHz
Overclocked clock speed (Air) 2.25 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 51,200 MB/s 51,200 MB/s
Intel Xeon E5 2620 v2
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AMD Opteron 6338P
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