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Differences What are the advantages of each

Front view of Intel Xeon E7420

Reasons to consider the
Intel Xeon E7420

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Supports more CPUs in SMP configuration 32 vs 1 31 supports more CPUs in SMP configuration
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core
Higher Maximum operating temperature 68 °C vs 64 °C More than 5% higher Maximum operating temperature
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 2.13 GHz Around 90% higher clock speed
Much newer manufacturing process 14 nm vs 45 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 overclocked clock speed (Air) 4.61 GHz vs 2.13 GHz Around 2.2x better overclocked clock speed (Air)
Newer Jul, 2015 vs Sep, 2008 Release date over 6 years later
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Water) 4.77 GHz vs 2.13 GHz Around 2.2x better overclocked clock speed (Water)

Features Key features of the Xeon E7420  vs Core i7 6700K 

clock speed

Xeon E7420
2.13 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon E7420
2.13 GHz
Core i7 6700K
4.61 GHz

overclocked clock speed (water)

Xeon E7420
2.13 GHz
Core i7 6700K
4.77 GHz

Specifications Full list of technical specs

summary

Xeon E7420  vs
Core i7 6700K 
Clock speed 2.13 GHz 4 GHz
Cores Quad core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing No 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 90W 91W
Annual home energy cost 21.68 $/year 21.92 $/year
Annual commercial energy cost 78.84 $/year 79.72 $/year
Typical power consumption 73.13W 73.94W

details

Xeon E7420  vs
Core i7 6700K 
Architecture x86-64 x86-64
Threads 4 8
L2 cache 8 MB 1 MB
L2 cache per core 2 MB/core 0.25 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 14 nm
Max CPUs 32 1
Operating temperature Unknown - 68°C Unknown - 64°C

overclocking

Overclocked clock speed 2.13 GHz 4.61 GHz
Overclocked clock speed (Water) 2.13 GHz 4.77 GHz
Overclocked clock speed (Air) 2.13 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

bus

Architecture FSB FSB
Number of links 1 0
Intel Xeon E7420
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Intel Core i7 6700K
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