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Differences What are the advantages of each

Front view of Intel Xeon E7-2820

Reasons to consider the
Intel Xeon E7-2820

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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
Significantly more l3 cache 18 MB vs 8 MB 2.2x more l3 cache; more data can be stored in the l3 cache for quick access later
Supports more RAM 1,048,576 MB vs 65,536 MB Supports 16x more RAM
More cores 8 vs 4 Twice as many cores; run more applications at once
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More threads 16 vs 8 Twice as many threads
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More l3 cache per core 2.25 MB/core vs 2 MB/core Around 15% more l3 cache per core
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 GHz 2x higher clock speed
Much higher turbo clock speed 4.2 GHz vs 2.27 GHz More than 85% 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
Lower typical power consumption 73.94W vs 85.31W Around 15% lower typical power consumption
Newer Jul, 2015 vs Apr, 2011 Release date over 4 years later
Lower annual home energy cost 21.92 $/year vs 25.29 $/year Around 15% lower annual home energy cost
Lower annual commercial energy cost 79.72 $/year vs 91.98 $/year Around 15% lower annual commercial energy cost

Features Key features of the Xeon E7-2820  vs Core i7 6700K 

clock speed

turbo clock speed

Xeon E7-2820
2.27 GHz
Core i7 6700K
4.2 GHz

L2 cache

L3 cache

Specifications Full list of technical specs

summary

Xeon E7-2820  vs
Core i7 6700K 
Clock speed 2 GHz 4 GHz
Turbo clock speed 2.27 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3
DDR
Channels Quad Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 1,048,576 MB 65,536 MB

details

Xeon E7-2820  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 18 MB 8 MB
L3 cache per core 2.25 MB/core 2 MB/core
Manufacture process 32 nm 14 nm
Max CPUs 2 1
Operating temperature Unknown - 64°C Unknown - 64°C

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

power consumption

TDP 105W 91W
Annual home energy cost 25.29 $/year 21.92 $/year
Annual commercial energy cost 91.98 $/year 79.72 $/year
Typical power consumption 85.31W 73.94W

bus

Architecture QPI FSB
Number of links 1 0
Transfer rate 5,860 MT/s 8,000 MT/s
Intel Xeon E7-2820
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Intel Core i7 6700K
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