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Differences What are the advantages of each

Front view of Intel Xeon E5-4620

Reasons to consider the
Intel Xeon E5-4620

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Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More l3 cache 16 MB vs 8 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 8 vs 4 Twice as many cores; run more applications at once
More threads 16 vs 8 Twice as many threads
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Supports more RAM 393,216 MB vs 65,536 MB Supports 6x more RAM
Better performance per watt 5.25 pt/W vs 3.49 pt/W More than 50% better performance per watt
Front view of Intel Core i7 6700K

Reasons to consider the
Intel Core i7 6700K

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Much higher clock speed 4 GHz vs 2.2 GHz More than 80% higher clock speed
Much higher turbo clock speed 4.2 GHz vs 2.6 GHz More than 60% higher turbo clock speed
Much newer manufacturing process 14 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better PassMark (Single core) score 2,349 vs 1,232 More than 90% better PassMark (Single core) score
Much better overclocked clock speed (Air) 4.61 GHz vs 2.32 GHz Around 2x better overclocked clock speed (Air)
Much better performance per dollar 0.91 pt/$ vs 0.27 pt/$ More than 3.2x better performance per dollar
Better PassMark score 11,109 vs 8,127 More than 35% better PassMark score
Newer Jul, 2015 vs May, 2012 Release date over 3 years later
Much better overclocked clock speed (Water) 4.77 GHz vs 2.2 GHz Around 2.2x better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5-4620 vs Core i7 6700K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5-4620
61,522
Core i7 6700K
17,583

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-4620
1,830 MB/s
Core i7 6700K
6,010 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-4620  vs
Core i7 6700K 
Clock speed 2.2 GHz 4 GHz
Turbo clock speed 2.6 GHz 4.2 GHz
Cores Octa core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
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 95W 91W
Annual home energy cost 22.89 $/year 21.92 $/year
Annual commercial energy cost 83.22 $/year 79.72 $/year
Performance per watt 5.25 pt/W 3.49 pt/W
Typical power consumption 77.19W 73.94W

bus

Architecture QPI FSB
Number of links 2 0
Transfer rate 7,200 MT/s 8,000 MT/s

details

Xeon E5-4620  vs
Core i7 6700K 
Architecture x86-64 x86-64
Threads 16 8
L2 cache 2 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 16 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 14 nm
Max CPUs 4 1

overclocking

Overclocked clock speed 2.32 GHz 4.61 GHz
Overclocked clock speed (Water) 2.2 GHz 4.77 GHz
Overclocked clock speed (Air) 2.32 GHz 4.61 GHz

integrated graphics

GPU None GPU
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
DDR3L-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Quad Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 42,666.64 MB/s 25,600 MB/s
Maximum memory size 393,216 MB 65,536 MB
Intel Xeon E5-4620
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Intel Core i7 6700K
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