CPUBoss Review Our evaluation of 6700 vs 5820K among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

8.1

CPUBoss Score

Combination of all six facets

Winner
Intel Core i7 5820K 

CPUBoss recommends the Intel Core i7 5820K  based on its performance and value.

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VS

Differences What are the advantages of each

Front view of Intel Core i7 6700

Reasons to consider the
Intel Core i7 6700

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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 4 GHz vs 3.6 GHz More than 10% higher turbo clock speed
Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly lower typical power consumption 52.81W vs 113.75W 2.2x lower typical power consumption
Significantly better CompuBench 1.5 video composition score 11.57 fps vs 3.71 fps More than 3x better CompuBench 1.5 video composition score
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Newer Jul, 2015 vs Jul, 2014 Release date a year later
Slightly better PassMark (Single core) score 2,159 vs 2,017 More than 5% better PassMark (Single core) score
Significantly lower annual commercial energy cost 56.94 $/year vs 122.64 $/year 2.2x lower annual commercial energy cost
Significantly lower annual home energy cost 15.66 $/year vs 33.73 $/year 2.2x lower annual home energy cost
Front view of Intel Core i7 5820K

Reasons to consider the
Intel Core i7 5820K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much better performance per dollar 5.06 pt/$ vs 1.18 pt/$ More than 4.2x better performance per dollar
More l3 cache 15 MB vs 8 MB Around 90% more l3 cache; more data can be stored in the l3 cache for quick access later
Significantly better performance per watt 10.8 pt/W vs 4.71 pt/W More than 2.2x better performance per watt
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Better PassMark score 12,995 vs 10,038 Around 30% better PassMark score
More cores 6 vs 4 2 more cores; run more applications at once
More threads 12 vs 8 4 more threads
Better overclocked clock speed (Air) 4.35 GHz vs 3.83 GHz Around 15% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 4.51 GHz vs 4.18 GHz Around 10% better overclocked clock speed (Water)

Benchmarks Real world tests of Core i7 6700 vs 5820K

CompuBench 1.5 (Face detection)

Core i7 6700
-1 mPixels/s
Core i7 5820K
6.74 mPixels/s

CompuBench 1.5 (Video composition) Data courtesy CompuBench

Core i7 6700
11.57 fps
Core i7 5820K
3.71 fps

PassMark Data courtesy Passmark

Core i7 6700
10,038
Core i7 5820K
12,995

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 6700  vs
5820K 
Clock speed 3.4 GHz 3.3 GHz
Turbo clock speed 4 GHz 3.6 GHz
Cores Quad core Hexa core
Is unlocked No Yes

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 65W 140W
Annual home energy cost 15.66 $/year 33.73 $/year
Annual commercial energy cost 56.94 $/year 122.64 $/year
Performance per watt 4.71 pt/W 10.8 pt/W
Typical power consumption 52.81W 113.75W

bus

Architecture FSB QPI
Number of links 1 0
Transfer rate 8,000 MT/s 0 MT/s

details

Core i7 6700  vs
5820K 
Architecture x86-64 x86-64
Threads 8 12
L3 cache 8 MB 15 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 14 nm 22 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.83 GHz 4.35 GHz
Overclocked clock speed (Water) 4.18 GHz 4.51 GHz
Overclocked clock speed (Air) 3.83 GHz 4.35 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 530 N/A
Number of displays supported 3 N/A
GPU clock speed 350 MHz N/A
Turbo clock speed 1,150 MHz N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR4-1333
DDR4-1600
DDR4-2133
Channels Dual Channel Quad Channel
Supports ECC No No
Maximum memory size 65,536 MB 65,536 MB
Intel Core i7 6700
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Intel Core i7 5820K
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