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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 newer manufacturing process 14 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher turbo clock speed 4 GHz vs 3.4 GHz Around 20% higher turbo clock speed
Higher clock speed 3.6 GHz vs 3.1 GHz More than 15% higher clock speed
Better PassMark score 10,346 vs 5,954 Around 75% better PassMark score
More number of displays supported 3 vs 2 1 more number of displays supported
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
Lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
Newer Oct, 2015 vs Apr, 2011 Release date over 4 years later
Better PassMark (Single core) score 2,164 vs 1,747 Around 25% better PassMark (Single core) score
More threads 8 vs 4 Twice as many threads
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Better performance per watt 3.54 pt/W vs 2.31 pt/W Around 55% better performance per watt
Lower annual home energy cost 19.27 $/year vs 22.89 $/year More than 15% lower annual home energy cost
Lower annual commercial energy cost 70.08 $/year vs 83.22 $/year More than 15% lower annual commercial energy cost
Front view of Intel Xeon E3-1225

Reasons to consider the
Intel Xeon E3-1225

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Much higher GPU clock speed 850 MHz vs 400 MHz Around 2.2x higher GPU clock speed
Significantly better turbo clock speed 1,350 MHz vs 1,150 MHz More than 15% better turbo clock speed
Better performance per dollar 1.01 pt/$ vs 0.8 pt/$ More than 25% better performance per dollar

Benchmarks Real world tests of Xeon E3-1275 v5 vs E3-1225

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs


Xeon E3-1275 v5  vs
Clock speed 3.6 GHz 3.1 GHz
Turbo clock speed 4 GHz 3.4 GHz
Cores Quad core Quad core


Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
AVX 2.0
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Memory type
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 21,333.32 MB/s
Maximum memory size 65,536 MB 32,768 MB


Xeon E3-1275 v5  vs
Architecture x86-64 x86-64
Threads 8 4
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 14 nm 32 nm
Max CPUs 1 1

integrated graphics

Label Intel® HD Graphics P530 Intel® HD Graphics P3000
Number of displays supported 3 2
GPU clock speed 400 MHz 850 MHz
Turbo clock speed 1,150 MHz 1,350 MHz

power consumption

TDP 80W 95W
Annual home energy cost 19.27 $/year 22.89 $/year
Annual commercial energy cost 70.08 $/year 83.22 $/year
Performance per watt 3.54 pt/W 2.31 pt/W
Typical power consumption 65W 77.19W


Architecture FSB DMI
Number of links 1 1
Transfer rate 8,000 MT/s 5,000 MT/s
Intel Xeon E3-1275 v5
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Intel Xeon E3-1225
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