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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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Much higher clock speed 3.6 GHz vs 2.3 GHz More than 55% higher clock speed
Higher turbo clock speed 4 GHz vs 3.3 GHz More than 20% higher turbo clock speed
Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly better turbo clock speed 1,150 MHz vs 1,000 MHz 15% better turbo clock speed
Much better overclocked clock speed (Air) 4 GHz vs 2.3 GHz Around 75% better overclocked clock speed (Air)
Better PassMark score 10,346 vs 7,850 More than 30% better PassMark score
Better performance per dollar 0.8 pt/$ vs 0.57 pt/$ More than 40% better performance per dollar
Higher GPU clock speed 400 MHz vs 350 MHz Around 15% higher GPU clock speed
Newer Oct, 2015 vs Apr, 2013 Release date over 2 years later
Better PassMark (Single core) score 2,164 vs 1,949 More than 10% better PassMark (Single core) score
Much better overclocked clock speed (Water) 4 GHz vs 2.3 GHz Around 75% better overclocked clock speed (Water)
Front view of Intel Xeon E3-1268L v3

Reasons to consider the
Intel Xeon E3-1268L v3

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Significantly lower typical power consumption 36.56W vs 65W Around 45% lower typical power consumption
Better performance per watt 4.75 pt/W vs 3.54 pt/W Around 35% better performance per watt
Significantly lower annual home energy cost 10.84 $/year vs 19.27 $/year Around 45% lower annual home energy cost
Significantly lower annual commercial energy cost 39.42 $/year vs 70.08 $/year Around 45% lower annual commercial energy cost

Benchmarks Real world tests of Xeon E3-1275 v5 vs E3-1268L v3

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E3-1275 v5
5,405 MB/s
Xeon E3-1268L v3
3,875 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E3-1275 v5  vs
E3-1268L v3 
Clock speed 3.6 GHz 2.3 GHz
Turbo clock speed 4 GHz 3.3 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 80W 45W
Annual home energy cost 19.27 $/year 10.84 $/year
Annual commercial energy cost 70.08 $/year 39.42 $/year
Performance per watt 3.54 pt/W 4.75 pt/W
Typical power consumption 65W 36.56W

bus

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

details

Xeon E3-1275 v5  vs
E3-1268L v3 
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 14 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4 GHz 2.3 GHz
Overclocked clock speed (Water) 4 GHz 2.3 GHz
Overclocked clock speed (Air) 4 GHz 2.3 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics P530 Intel® HD Graphics 4600
Number of displays supported 3 3
GPU clock speed 400 MHz 350 MHz
Turbo clock speed 1,150 MHz 1,000 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3-1600
DDR3-1333
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 65,536 MB 32,768 MB
Intel Xeon E3-1275 v5
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Intel Xeon E3-1268L v3
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