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Differences What are the advantages of each

Front view of Intel Xeon E3-1265L v2

Reasons to consider the
Intel Xeon E3-1265L v2

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Much better performance per dollar 2.8 pt/$ vs 0.87 pt/$ Around 3.2x better performance per dollar
Higher clock speed 2.5 GHz vs 2 GHz 25% higher clock speed
Higher turbo clock speed 3.5 GHz vs 3 GHz More than 15% higher turbo clock speed
Much better performance per watt 19.91 pt/W vs 8.74 pt/W More than 2.2x better performance per watt
Significantly higher GPU clock speed 650 MHz vs 400 MHz Around 65% higher GPU clock speed
More threads 8 vs 4 Twice as many threads
Better PassMark score 7,745 vs 6,352 More than 20% better PassMark score
Better PassMark (Single core) score 1,739 vs 1,584 Around 10% better PassMark (Single core) score
Front view of Intel Xeon E3-1235L v5

Reasons to consider the
Intel Xeon E3-1235L v5

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Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 20.31W vs 36.56W Around 45% lower typical power consumption
Newer Oct, 2015 vs May, 2012 Release date over 3 years later
Better overclocked clock speed (Air) 3 GHz vs 2.5 GHz 20% better overclocked clock speed (Air)
Lower annual home energy cost 6.02 $/year vs 10.84 $/year Around 45% lower annual home energy cost
Lower annual commercial energy cost 21.9 $/year vs 39.42 $/year Around 45% lower annual commercial energy cost
Better overclocked clock speed (Water) 3 GHz vs 2.5 GHz 20% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E3-1265L v2 vs E3-1235L v5

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E3-1265L v2  vs
E3-1235L v5 
Clock speed 2.5 GHz 2 GHz
Turbo clock speed 3.5 GHz 3 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 45W 25W
Annual home energy cost 10.84 $/year 6.02 $/year
Annual commercial energy cost 39.42 $/year 21.9 $/year
Performance per watt 19.91 pt/W 8.74 pt/W
Typical power consumption 36.56W 20.31W

bus

Architecture DMI FSB
Number of links 1 1
Transfer rate 5,000 MT/s 8,000 MT/s

details

Xeon E3-1265L v2  vs
E3-1235L v5 
Architecture x86-64 x86-64
Threads 8 4
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 22 nm 14 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.5 GHz 3 GHz
Overclocked clock speed (Water) 2.5 GHz 3 GHz
Overclocked clock speed (Air) 2.5 GHz 3 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 2500 Intel® HD Graphics P530
Number of displays supported 3 3
GPU clock speed 650 MHz 400 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3
DDR3L-1333
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 12,800 MB/s
Maximum memory size 33,556.48 MB 65,536 MB
Intel Xeon E3-1265L v2
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Intel Xeon E3-1235L v5
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