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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 1.7 GHz More than 2x higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better PassMark (Single core) score 2,164 vs 974 Around 2.2x better PassMark (Single core) score
Much better overclocked clock speed (Air) 4 GHz vs 2.3 GHz Around 75% better overclocked clock speed (Air)
Significantly better PassMark score 10,346 vs 5,621 Around 85% better PassMark score
Much better overclocked clock speed (Water) 4 GHz vs 1.7 GHz More than 2.2x better overclocked clock speed (Water)
Better performance per watt 3.54 pt/W vs 1.99 pt/W Around 80% better performance per watt
More threads 8 vs 6 2 more threads
Slightly lower typical power consumption 65W vs 69.06W More than 5% lower typical power consumption
Slightly lower annual home energy cost 19.27 $/year vs 20.48 $/year More than 5% lower annual home energy cost
Slightly lower annual commercial energy cost 70.08 $/year vs 74.46 $/year More than 5% lower annual commercial energy cost
Front view of Intel E5-2603V4

Reasons to consider the
Intel E5-2603V4

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More l3 cache 15 MB vs 8 MB Around 90% more l3 cache; more data can be stored in the l3 cache for quick access later
Supports more RAM 1,572,864 MB vs 65,536 MB Supports 24x more RAM
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More cores 6 vs 4 2 more cores; run more applications at once
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Newer Jan, 2016 vs Oct, 2015 Release date 3 months later

Benchmarks Real world tests of Xeon E3-1275 v5 vs E5-2603V4

PassMark Data courtesy Passmark

E5-2603V4
5,621

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E3-1275 v5  vs
E5-2603V4 
Clock speed 3.6 GHz 1.7 GHz
Cores Quad core Hexa 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 85W
Annual home energy cost 19.27 $/year 20.48 $/year
Annual commercial energy cost 70.08 $/year 74.46 $/year
Performance per watt 3.54 pt/W 1.99 pt/W
Typical power consumption 65W 69.06W

bus

Architecture FSB QPI
Number of links 1 2
Transfer rate 8,000 MT/s 6,400 MT/s

details

Xeon E3-1275 v5  vs
E5-2603V4 
Architecture x86-64 x86-64
Threads 8 6
L3 cache 8 MB 15 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 14 nm 14 nm
Max CPUs 1 2

overclocking

Overclocked clock speed 4 GHz 2.3 GHz
Overclocked clock speed (Water) 4 GHz 1.7 GHz
Overclocked clock speed (Air) 4 GHz 2.3 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics P530 N/A
Number of displays supported 3 N/A
GPU clock speed 400 MHz N/A
Turbo clock speed 1,150 MHz N/A

memory controller

Memory controller Built-in Built-in
Channels Dual Channel Quad Channel
Supports ECC Yes Yes
Maximum memory size 65,536 MB 1,572,864 MB
Intel Xeon E3-1275 v5
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Intel E5-2603V4
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