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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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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
Significantly better PassMark (Single core) score 2,148 vs 1,406 Around 55% better PassMark (Single core) score
Slightly more l3 cache 6 MB vs 4 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Better PassMark score 8,012 vs 4,651 More than 70% better PassMark score
More l3 cache per core 1.5 MB/core vs 1 MB/core 50% more l3 cache per core
Newer Jul, 2015 vs Oct, 2012 Release date over 2 years later
Front view of AMD FX 4300

Reasons to consider the
AMD FX 4300

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Much better performance per dollar 10.97 pt/$ vs 0.89 pt/$ More than 12.2x better performance per dollar
Much more l2 cache 4 MB vs 1 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Higher clock speed 3.8 GHz vs 3.5 GHz Around 10% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Much better performance per watt 9.24 pt/W vs 2.45 pt/W More than 3.8x better performance per watt
Higher Maximum operating temperature 70.5 °C vs 64 °C More than 10% higher Maximum operating temperature
Better overclocked clock speed (Water) 4.98 GHz vs 4.57 GHz Around 10% better overclocked clock speed (Water)

Benchmarks Real world tests of Core i5 6600K vs FX 4300

GeekBench 3 (Multi-core) Data courtesy Primate Labs

FX 4300
5,582

GeekBench 3 (Single core) Data courtesy Primate Labs

FX 4300
1,981

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i5 6600K
209.7 MB/s
FX 4300
2,210,000 MB/s

Cinebench R10 32-Bit

Core i5 6600K
29,116
FX 4300
12,857

Cinebench R10 32-Bit (Single Core)

FX 4300
4,114

PassMark Data courtesy Passmark

FX 4300
4,651

PassMark (Single Core)

FX 4300
1,406

Specifications Full list of technical specs

summary

Core i5 6600K  vs
FX 4300 
Clock speed 3.5 GHz 3.8 GHz
Turbo clock speed 3.9 GHz 4 GHz
Cores Quad core Quad core
Is unlocked Yes Yes

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
SSE4
XOP
AVX
SSE3
SSE
ABM
BMI1
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
Supplemental SSE3
AES
TBM
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 91W 95W
Annual home energy cost 21.92 $/year 22.89 $/year
Annual commercial energy cost 79.72 $/year 83.22 $/year
Performance per watt 2.45 pt/W 9.24 pt/W
Typical power consumption 73.94W 77.19W

details

Core i5 6600K  vs
FX 4300 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 4 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 6 MB 4 MB
L3 cache per core 1.5 MB/core 1 MB/core
Manufacture process 14 nm 32 nm
Max CPUs 1 1
Operating temperature Unknown - 64°C Unknown - 70.5°C

overclocking

Overclocked clock speed 4.54 GHz 4.48 GHz
Overclocked clock speed (Water) 4.57 GHz 4.98 GHz
Overclocked clock speed (Air) 4.54 GHz 4.48 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
DDR3-1866
DDR3L-1600
Channels Dual Channel Dual Channel
Supports ECC No Yes
Maximum bandwidth 25,600 MB/s 29,866.66 MB/s
Intel Core i5 6600K
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AMD FX 4300
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