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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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Much higher clock speed 2.5 GHz vs 1.1 GHz More than 2.2x higher clock speed
Much higher turbo clock speed 3.7 GHz vs 1.5 GHz Around 2.5x higher turbo clock speed
Much better PassMark score 8,691 vs 2,110 More than 4x better PassMark score
Much better PassMark (Single core) score 2,074 vs 829 More than 2.5x better PassMark (Single core) score
Much more l3 cache 8 MB vs 4 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Air) 2.5 GHz vs 1.8 GHz Around 40% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 2.5 GHz vs 1.8 GHz Around 40% better overclocked clock speed (Water)
Front view of Intel Xeon E3-1220L v3

Reasons to consider the
Intel Xeon E3-1220L v3

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Significantly lower typical power consumption 10.56W vs 36.56W 3.5x lower typical power consumption
Significantly lower annual commercial energy cost 11.39 $/year vs 39.42 $/year 3.5x lower annual commercial energy cost
Significantly lower annual home energy cost 3.13 $/year vs 10.84 $/year 3.5x lower annual home energy cost

Benchmarks Real world tests of Xeon E3-1265L v3 vs E3-1220L v3

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E3-1265L v3  vs
E3-1220L v3 
Clock speed 2.5 GHz 1.1 GHz
Turbo clock speed 3.7 GHz 1.5 GHz
Cores Quad core Dual 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 13W
Annual home energy cost 10.84 $/year 3.13 $/year
Annual commercial energy cost 39.42 $/year 11.39 $/year
Performance per watt 5.17 pt/W 6.89 pt/W
Typical power consumption 36.56W 10.56W

bus

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

details

Xeon E3-1265L v3  vs
E3-1220L v3 
Architecture x86-64 x86-64
Threads 8 4
L3 cache 8 MB 4 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.5 GHz 1.8 GHz
Overclocked clock speed (Water) 2.5 GHz 1.8 GHz
Overclocked clock speed (Air) 2.5 GHz 1.8 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
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 32,768 MB 32,768 MB
Intel Xeon E3-1265L v3
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Intel Xeon E3-1220L v3
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