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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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Higher clock speed 3.6 GHz vs 3.3 GHz Around 10% higher clock speed
Higher turbo clock speed 4 GHz vs 3.7 GHz Around 10% higher turbo clock speed
More threads 8 vs 4 Twice as many threads
Better PassMark score 10,346 vs 7,758 Around 35% better PassMark score
Better PassMark (Single core) score 2,164 vs 1,994 Around 10% better PassMark (Single core) score
Better overclocked clock speed (Water) 4 GHz vs 3.7 GHz Around 10% better overclocked clock speed (Water)
Front view of Intel Xeon E3-1225 v5

Reasons to consider the
Intel Xeon E3-1225 v5

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Significantly better performance per dollar 1.09 pt/$ vs 0.8 pt/$ More than 35% better performance per dollar
Better overclocked clock speed (Air) 4.39 GHz vs 4 GHz Around 10% better overclocked clock speed (Air)

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

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 E3-1225 v5
4,920 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E3-1275 v5  vs
E3-1225 v5 
Clock speed 3.6 GHz 3.3 GHz
Turbo clock speed 4 GHz 3.7 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 80W
Annual home energy cost 19.27 $/year 19.27 $/year
Annual commercial energy cost 70.08 $/year 70.08 $/year
Performance per watt 3.54 pt/W 3.05 pt/W
Typical power consumption 65W 65W

bus

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

details

Xeon E3-1275 v5  vs
E3-1225 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 14 nm 14 nm
Max CPUs 1 1
Voltage range 0.55 - 1.52V 0.55 - 1.52V

overclocking

Overclocked clock speed 4 GHz 4.39 GHz
Overclocked clock speed (Water) 4 GHz 3.7 GHz
Overclocked clock speed (Air) 4 GHz 4.39 GHz

integrated graphics

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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
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 65,536 MB
Intel Xeon E3-1275 v5
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Intel Xeon E3-1225 v5
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