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Differences What are the advantages of each

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 1.4 GHz More than 2.8x higher clock speed
Much newer manufacturing process 14 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly more l2 cache 1 MB vs 0.25 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
More l3 cache 8 MB vs 1.5 MB More than 5.2x more l3 cache; more data can be stored in the l3 cache for quick access later
Much better overclocked clock speed (Air) 4.61 GHz vs 1.4 GHz More than 3.2x better overclocked clock speed (Air)
Significantly better turbo clock speed 1,150 MHz vs 950 MHz More than 20% better turbo clock speed
More threads 8 vs 1 7 more threads
More cores 4 vs 1 3 more cores; run more applications at once
More number of displays supported 3 vs 2 1 more number of displays supported
Newer Jul, 2015 vs Jan, 2012 Release date over 3 years later
Much better overclocked clock speed (Water) 4.77 GHz vs 1.4 GHz Around 3.5x better overclocked clock speed (Water)
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Front view of Intel Celeron 797

Reasons to consider the
Intel Celeron 797

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Much lower typical power consumption 13.81W vs 73.94W 5.4x lower typical power consumption
Much higher Maximum operating temperature 100 °C vs 64 °C More than 55% higher Maximum operating temperature
Much lower annual home energy cost 4.1 $/year vs 21.92 $/year 5.4x lower annual home energy cost
Much lower annual commercial energy cost 14.89 $/year vs 79.72 $/year 5.4x lower annual commercial energy cost

Features Key features of the Core i7 6700K  vs Celeron 797 

clock speed

Celeron 797
1.4 GHz

L2 cache

Celeron 797
0.25 MB

L3 cache

gpu clock speed

Core i7 6700K
350 MHz
Celeron 797
350 MHz

overclocked clock speed (air)

Core i7 6700K
4.61 GHz
Celeron 797
1.4 GHz

overclocked clock speed (water)

Core i7 6700K
4.77 GHz
Celeron 797
1.4 GHz

Specifications Full list of technical specs

summary

Core i7 6700K  vs
Celeron 797 
Clock speed 4 GHz 1.4 GHz
Cores Quad core Single core

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 91W 17W
Annual home energy cost 21.92 $/year 4.1 $/year
Annual commercial energy cost 79.72 $/year 14.89 $/year
Typical power consumption 73.94W 13.81W

bus

Architecture FSB DMI
Number of links 0 1
Transfer rate 8,000 MT/s 5,000 MT/s

details

Core i7 6700K  vs
Celeron 797 
Architecture x86-64 x86-64
Threads 8 1
L2 cache 1 MB 0.25 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 1.5 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 14 nm 32 nm
Max CPUs 1 1
Operating temperature Unknown - 64°C Unknown - 100°C

overclocking

Overclocked clock speed 4.61 GHz 1.4 GHz
Overclocked clock speed (Water) 4.77 GHz 1.4 GHz
Overclocked clock speed (Air) 4.61 GHz 1.4 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 530 Intel® HD Graphics
Number of displays supported 3 2
GPU clock speed 350 MHz 350 MHz
Turbo clock speed 1,150 MHz 950 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 21,333.32 MB/s
Maximum memory size 65,536 MB 16,384 MB
Intel Core i7 6700K
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Intel Celeron 797
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