CPUBoss Review Our evaluation of 6600K vs 6500 among all CPUs

Performance

Benchmark performance using all cores
Core i5 6600K
5.9
Core i5 6500
6.1
Core i7 6700K
6.6
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance
Core i5 6600K
7.4
Core i5 6500
7.7
Core i7 6700K
8.1
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics
Core i5 6600K
n.d.
Core i5 6500
n.d.
Core i7 6700K
n.d.
Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing
Core i5 6600K
7.8
Core i5 6500
7.7
Core i7 6700K
8.1
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?
Core i5 6600K
5.1
Core i5 6500
5.2
Core i7 6700K
5.1
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?
Core i5 6600K
5.8
Core i5 6500
5.5
Core i7 6700K
5.7
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

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Intel Core i5 6600K

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 Front view of Intel Core i5 6600K
Front view of Intel Core i5 6500

Intel Core i5 6500

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Differences What are the advantages of each

Front view of Intel Core i5 6600K

Reasons to consider the
Intel Core i5 6600K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Higher turbo clock speed 3.9 GHz vs 3.6 GHz Around 10% higher turbo clock speed
Higher clock speed 3.5 GHz vs 3.2 GHz Around 10% higher clock speed
Better turbo clock speed 1,150 MHz vs 1,050 MHz Around 10% better turbo clock speed
Better performance per dollar 1.17 pt/$ vs 0.63 pt/$ More than 85% better performance per dollar
Better PassMark (Single core) score 2,148 vs 1,951 More than 10% better PassMark (Single core) score
Better overclocked clock speed (Air) 4.54 GHz vs 3.8 GHz Around 20% better overclocked clock speed (Air)
Front view of Intel Core i5 6500

Reasons to consider the
Intel Core i5 6500

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Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Lower typical power consumption 52.81W vs 73.94W Around 30% lower typical power consumption
Better CompuBench 1.5 ocean surface simulation score 231.38 fps vs 171.82 fps Around 35% better CompuBench 1.5 ocean surface simulation score
Higher Maximum operating temperature 71 °C vs 64 °C More than 10% higher Maximum operating temperature
Better performance per watt 3.9 pt/W vs 2.4 pt/W More than 60% better performance per watt
Lower annual commercial energy cost 56.94 $/year vs 79.72 $/year Around 30% lower annual commercial energy cost
Lower annual home energy cost 15.66 $/year vs 21.92 $/year Around 30% lower annual home energy cost

Benchmarks Real world tests of Core i5 6600K vs 6500

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i5 6600K
35.31 mHash/s
Core i5 6500
30.46 mHash/s

CompuBench 1.5 (Face detection)

Core i5 6600K
25.92 mPixels/s
Core i5 6500
22.75 mPixels/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Core i5 6600K
1.91 fps
Core i5 6500
1.55 fps

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i5 6600K
5,051
Core i5 6500
13,537

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i5 6600K
3,134
Core i5 6500
4,233

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i5 6600K
209.7 MB/s
Core i5 6500
5,880 MB/s

PassMark Data courtesy Passmark

Core i5 6600K
8,012
Core i5 6500
7,217

PassMark (Single Core)

Core i5 6600K
2,148
Core i5 6500
1,951

Specifications Full list of technical specs

summary

 Core i5 6600K  vs
6500 
Clock speed 3.5 GHz 3.2 GHz
Turbo clock speed 3.9 GHz 3.6 GHz
Cores Quad core Quad core
Is unlocked Yes No

features
Has a NX bit Yes Yes
Supports trusted computing No Yes
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 91W 65W
Annual home energy cost 21.92 $/year 15.66 $/year
Annual commercial energy cost 79.72 $/year 56.94 $/year
Performance per watt 2.4 pt/W 3.9 pt/W
Typical power consumption 73.94W 52.81W

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

details

 Core i5 6600K  vs
6500 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 6 MB 6 MB
L3 cache per core 1.5 MB/core 1.5 MB/core
Manufacture process 14 nm 14 nm
Max CPUs 1 1
Operating temperature Unknown - 64°C Unknown - 71°C

overclocking
Overclocked clock speed 4.54 GHz 3.8 GHz
Overclocked clock speed (Water) 4.55 GHz 4.33 GHz
Overclocked clock speed (Air) 4.54 GHz 3.8 GHz

integrated graphics
GPU GPU GPU
Label Intel® HD Graphics 530 Intel® HD Graphics 530
Number of displays supported 3 3
GPU clock speed 350 MHz 350 MHz
Turbo clock speed 1,150 MHz 1,050 MHz

memory controller
Memory controller Built-in Built-in
Memory type
DDR3L-1600
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 65,536 MB 65,536 MB
Intel Core i5 6600K
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Intel Core i5 6500
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