CPUBoss Review Our evaluation of 5820K vs 6600K 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

8.4

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

Intel Core i7 5820K

CPUBoss Winner
Front view of Intel Core i7 5820K

Differences What are the advantages of each

Front view of Intel Core i7 5820K

Reasons to consider the
Intel Core i7 5820K

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More l3 cache 15 MB vs 6 MB 2.5x more l3 cache; more data can be stored in the l3 cache for quick access later
Much better performance per dollar 3.87 pt/$ vs 1.34 pt/$ Around 3x better performance per dollar
Much more l3 cache per core 2.5 MB/core vs 1.5 MB/core More than 65% more l3 cache per core
More threads 12 vs 4 Three times as many threads
Significantly better performance per watt 10.77 pt/W vs 3.05 pt/W More than 3.5x better performance per watt
More cores 6 vs 4 2 more cores; run more applications at once
Better geekbench 3 Multi-Core score 19,546 vs 13,331 More than 45% better geekbench 3 Multi-Core score
Better cinebench r10 32Bit score 36,273 vs 29,116 Around 25% better cinebench r10 32Bit score
Front view of Intel Core i5 6600K

Reasons to consider the
Intel Core i5 6600K

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Much newer manufacturing process 14 nm vs 22 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
Higher turbo clock speed 3.9 GHz vs 3.6 GHz Around 10% higher turbo clock speed
Slightly higher clock speed 3.5 GHz vs 3.3 GHz More than 5% higher clock speed
Significantly better CompuBench 1.5 video composition score 11.95 fps vs 3.71 fps Around 3.2x better CompuBench 1.5 video composition score
Much better cinebench r10 32Bit 1-core score 8,372 vs 6,936 More than 20% better cinebench r10 32Bit 1-core score
Lower typical power consumption 73.94W vs 113.75W 35% lower typical power consumption
Newer Jul, 2015 vs Jul, 2014 Release date a year later
Slightly better PassMark (Single core) score 2,148 vs 2,016 More than 5% better PassMark (Single core) score
Lower annual commercial energy cost 79.72 $/year vs 122.64 $/year 35% lower annual commercial energy cost
Lower annual home energy cost 21.92 $/year vs 33.73 $/year 35% lower annual home energy cost

Benchmarks Real world tests of Core i7 5820K vs i5 6600K

CompuBench 1.5 (Face detection)

Core i7 5820K
6.74 mPixels/s
Core i5 6600K
28.75 mPixels/s

CompuBench 1.5 (Video composition) Data courtesy CompuBench

Core i7 5820K
3.71 fps
Core i5 6600K
11.95 fps

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 5820K
4,050,000 MB/s
Core i5 6600K
6,030 MB/s

Cinebench R10 32-Bit

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 5820K  vs
i5 6600K 
Clock speed 3.3 GHz 3.5 GHz
Turbo clock speed 3.6 GHz 3.9 GHz
Cores Hexa core Quad core
Is unlocked Yes Yes

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 140W 91W
Annual home energy cost 33.73 $/year 21.92 $/year
Annual commercial energy cost 122.64 $/year 79.72 $/year
Performance per watt 10.77 pt/W 3.05 pt/W
Typical power consumption 113.75W 73.94W

bus

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

details

Core i7 5820K  vs
i5 6600K 
Architecture x86-64 x86-64
Threads 12 4
L3 cache 15 MB 6 MB
L3 cache per core 2.5 MB/core 1.5 MB/core
Manufacture process 22 nm 14 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.34 GHz 4.54 GHz
Overclocked clock speed (Water) 4.53 GHz 4.56 GHz
Overclocked clock speed (Air) 4.34 GHz 4.54 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
DDR4-1333
DDR4-1600
DDR4-2133
Channels Quad Channel Dual Channel
Supports ECC No No
Maximum memory size 65,536 MB 65,536 MB
Intel Core i7 5820K
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Intel Core i5 6600K
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