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Differences What are the advantages of each

Front view of Intel Xeon E3-1275 v5

Reasons to consider the
Intel Xeon E3-1275 v5

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Better PassMark (Single core) score 2,164 vs 1,737 Around 25% better PassMark (Single core) score
Higher GPU clock speed 400 MHz vs 350 MHz Around 15% higher GPU clock speed
Better overclocked clock speed (Air) 4 GHz vs 3.5 GHz Around 15% better overclocked clock speed (Air)
Slightly better PassMark score 10,346 vs 9,403 More than 10% better PassMark score
Better overclocked clock speed (Water) 4 GHz vs 3.5 GHz Around 15% better overclocked clock speed (Water)
Front view of Intel E3-1585V5

Reasons to consider the
Intel E3-1585V5

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Lower typical power consumption 52.81W vs 65W Around 20% lower typical power consumption
Better performance per watt 4.45 pt/W vs 3.54 pt/W More than 25% better performance per watt
Lower annual commercial energy cost 56.94 $/year vs 70.08 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 19.27 $/year Around 20% lower annual home energy cost
Newer Apr, 2016 vs Oct, 2015 Release date 6 months later

Benchmarks Real world tests of Xeon E3-1275 v5 vs E3-1585V5

PassMark Data courtesy Passmark

E3-1585V5
9,403

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E3-1275 v5  vs
E3-1585V5 
Clock speed 3.6 GHz 3.5 GHz
Turbo clock speed 4 GHz 3.9 GHz
Cores Quad 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 80W 65W
Annual home energy cost 19.27 $/year 15.66 $/year
Annual commercial energy cost 70.08 $/year 56.94 $/year
Performance per watt 3.54 pt/W 4.45 pt/W
Typical power consumption 65W 52.81W

bus

Architecture FSB FSB
Number of links 1 0
Transfer rate 8,000 MT/s 8,000 MT/s

details

Xeon E3-1275 v5  vs
E3-1585V5 
Architecture x86-64 x86-64
Threads 8 8
Manufacture process 14 nm 14 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4 GHz 3.5 GHz
Overclocked clock speed (Water) 4 GHz 3.5 GHz
Overclocked clock speed (Air) 4 GHz 3.5 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics P530 Intel® Iris™ Pro Graphics P580
Number of displays supported 3 3
GPU clock speed 400 MHz 350 MHz
Turbo clock speed 1,150 MHz 1,150 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 12,800 MB/s
Maximum memory size 65,536 MB 65,536 MB
Intel Xeon E3-1275 v5
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Intel E3-1585V5
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