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Differences What are the advantages of each

Front view of Intel Xeon E5-2650 v3

Reasons to consider the
Intel Xeon E5-2650 v3

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More cores 10 vs 4 6 more cores; run more applications at once
More threads 20 vs 8 12 more threads
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Supports more RAM 786,432 MB vs 65,536 MB Supports 12x more RAM
Significantly better PassMark score 14,951 vs 9,403 Around 60% better PassMark score
Significantly better performance per watt 7.93 pt/W vs 4.45 pt/W Around 80% better performance per watt
Front view of Intel E3-1585V5

Reasons to consider the
Intel E3-1585V5

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Significantly higher clock speed 3.5 GHz vs 2.3 GHz More than 50% higher clock speed
Significantly higher turbo clock speed 3.9 GHz vs 3 GHz 30% higher turbo clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 52.81W vs 85.31W Around 40% lower typical power consumption
Significantly better overclocked clock speed (Air) 3.5 GHz vs 2.44 GHz Around 45% better overclocked clock speed (Air)
Newer Apr, 2016 vs Jul, 2014 Release date over 1 years later
Much lower annual home energy cost 15.66 $/year vs 25.29 $/year Around 40% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 91.98 $/year Around 40% lower annual commercial energy cost
Significantly better overclocked clock speed (Water) 3.5 GHz vs 2.3 GHz More than 50% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5-2650 v3 vs E3-1585V5

PassMark Data courtesy Passmark

E3-1585V5
9,403

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-2650 v3  vs
E3-1585V5 
Clock speed 2.3 GHz 3.5 GHz
Turbo clock speed 3 GHz 3.9 GHz
Cores Deca core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 105W 65W
Annual home energy cost 25.29 $/year 15.66 $/year
Annual commercial energy cost 91.98 $/year 56.94 $/year
Performance per watt 7.93 pt/W 4.45 pt/W
Typical power consumption 85.31W 52.81W

bus

Architecture QPI FSB
Number of links 2 0
Transfer rate 9,600 MT/s 8,000 MT/s

details

Xeon E5-2650 v3  vs
E3-1585V5 
Architecture x86-64 x86-64
Threads 20 8
Manufacture process 22 nm 14 nm
Max CPUs 2 1

overclocking

Overclocked clock speed 2.44 GHz 3.5 GHz
Overclocked clock speed (Water) 2.3 GHz 3.5 GHz
Overclocked clock speed (Air) 2.44 GHz 3.5 GHz

integrated graphics

GPU None GPU
Label N/A Intel® Iris™ Pro Graphics P580
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 1,150 MHz

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
Maximum memory size 786,432 MB 65,536 MB
Intel Xeon E5-2650 v3
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Intel E3-1585V5
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