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Differences What are the advantages of each

Front view of Intel Xeon E3-1265L v3

Reasons to consider the
Intel Xeon E3-1265L v3

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Front view of Intel Xeon E3-1260L v5

Reasons to consider the
Intel Xeon E3-1260L v5

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Higher clock speed 2.9 GHz vs 2.5 GHz More than 15% higher clock speed
Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Slightly higher turbo clock speed 3.9 GHz vs 3.7 GHz More than 5% higher turbo clock speed
Much better overclocked clock speed (Air) 3.9 GHz vs 2.5 GHz More than 55% better overclocked clock speed (Air)
Significantly better performance per dollar 1.11 pt/$ vs 0.79 pt/$ Around 40% better performance per dollar
Better performance per watt 7.23 pt/W vs 5.17 pt/W Around 40% better performance per watt
Newer Oct, 2015 vs Apr, 2013 Release date over 2 years later
Better PassMark score 10,067 vs 8,691 More than 15% better PassMark score
Much better overclocked clock speed (Water) 3.9 GHz vs 2.5 GHz More than 55% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E3-1265L v3 vs E3-1260L v5

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E3-1265L v3  vs
E3-1260L v5 
Clock speed 2.5 GHz 2.9 GHz
Turbo clock speed 3.7 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 45W 45W
Annual home energy cost 10.84 $/year 10.84 $/year
Annual commercial energy cost 39.42 $/year 39.42 $/year
Performance per watt 5.17 pt/W 7.23 pt/W
Typical power consumption 36.56W 36.56W

bus

Architecture DMI FSB
Number of links 0 1
Transfer rate 5,000 MT/s 8,000 MT/s

details

Xeon E3-1265L v3  vs
E3-1260L v5 
Architecture x86-64 x86-64
Threads 8 8
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 3.9 GHz
Overclocked clock speed (Water) 2.5 GHz 3.9 GHz
Overclocked clock speed (Air) 2.5 GHz 3.9 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics N/A
Number of displays supported 3 N/A
GPU clock speed 350 MHz N/A
Turbo clock speed 1,200 MHz N/A

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 32,768 MB 65,536 MB
Intel Xeon E3-1265L v3
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Intel Xeon E3-1260L v5
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