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Differences What are the advantages of each

Front view of Intel Xeon E3-1220 v5

Reasons to consider the
Intel Xeon E3-1220 v5

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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
Better overclocked clock speed (Air) 4.53 GHz vs 3.75 GHz More than 20% better overclocked clock speed (Air)
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Better performance per dollar 1.28 pt/$ vs 1.11 pt/$ Around 15% better performance per dollar
Newer Oct, 2015 vs Jul, 2015 Release date 3 months later
Front view of Intel Core i5 6600

Reasons to consider the
Intel Core i5 6600

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Higher turbo clock speed 3.9 GHz vs 3.5 GHz More than 10% higher turbo clock speed
Higher clock speed 3.3 GHz vs 3 GHz Around 10% higher clock speed
Lower typical power consumption 52.81W vs 65W Around 20% lower typical power consumption
Slightly better PassMark (Single core) score 2,123 vs 1,976 More than 5% better PassMark (Single core) score
Slightly better performance per watt 3.94 pt/W vs 3.35 pt/W Around 20% better performance per watt
Lower annual commercial energy cost 56.94 $/year vs 70.08 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 19.27 $/year Around 20% lower annual home energy cost
Better overclocked clock speed (Water) 3.87 GHz vs 3.5 GHz More than 10% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E3-1220 v5 vs Core i5 6600

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs


Xeon E3-1220 v5  vs
Core i5 6600 
Clock speed 3 GHz 3.3 GHz
Turbo clock speed 3.5 GHz 3.9 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

power consumption

TDP 80W 65W
Annual home energy cost 19.27 $/year 15.66 $/year
Annual commercial energy cost 70.08 $/year 56.94 $/year
Performance per watt 3.35 pt/W 3.94 pt/W
Typical power consumption 65W 52.81W


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


Xeon E3-1220 v5  vs
Core i5 6600 
Architecture x86-64 x86-64
Threads 4 4
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 14 nm 14 nm
Max CPUs 1 1


Overclocked clock speed 4.53 GHz 3.75 GHz
Overclocked clock speed (Water) 3.5 GHz 3.87 GHz
Overclocked clock speed (Air) 4.53 GHz 3.75 GHz

integrated graphics

Label N/A Intel® HD Graphics 530
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 1,150 MHz

memory controller

Memory controller Built-in Built-in
Memory type
Channels Dual Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 12,800 MB/s 25,600 MB/s
Maximum memory size 65,536 MB 65,536 MB
Intel Xeon E3-1220 v5
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Intel Core i5 6600
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