Intel Core i7 6700K vs Intel Core i7 7820X

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We compared two desktop CPUs: Intel Core i7 6700K with 4 cores 4.0GHz and Intel Core i7 7820X with 8 cores 3.6GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i7 6700K 's Advantages

Integrated graphics card

Higher base frequency (4.0GHz vs 3.6GHz)

Lower TDP (91W vs 140W)

Intel Core i7 7820X 's Advantages

Released 1 years and 9 months late

Higher specification of memory (DDR4-2666 vs DDR4-2133)

Larger memory bandwidth (79.47GB/s vs 34.1GB/s)

Larger L3 cache size (11MB vs 8MB)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i7 6700K

1136

Intel Core i7 7820X +17%

1338

Cinebench R23 Multi Core

Intel Core i7 6700K

5661

Intel Core i7 7820X +135%

13358

Geekbench 6 Single Core

Intel Core i7 6700K +23%

1544

Intel Core i7 7820X

1252

Geekbench 6 Multi Core

Intel Core i7 6700K

5265

Intel Core i7 7820X +42%

7510

Geekbench 5 Single Core

Intel Core i7 6700K

1087

Intel Core i7 7820X +3%

1120

Geekbench 5 Multi Core

Intel Core i7 6700K

4271

Intel Core i7 7820X +99%

8504

Passmark CPU Single Core

Intel Core i7 6700K

2510

Intel Core i7 7820X +1%

2536

Passmark CPU Multi Core

Intel Core i7 6700K

8940

Intel Core i7 7820X +92%

17189

Intel Core i7 6700K

VS

Intel Core i7 7820X

General Parameters

Aug 2015

Release Date

May 2017

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Skylake

Core Architecture

Skylake

i7-6700K

Processor Number

i7-7820X

LGA-1151

Socket

LGA-2066

HD Graphics 530

Integrated Graphics

N/A

Package

1.75 billions

Transistor Count

-

14 nm

Manufacturing Process

14 nm

LGA-1151

Socket

LGA-2066

91 W

Power Consumption

140 W

-

Peak Operating Temperature

99 °C

CPU Performance

4

Performance Cores

8

Performance Core Threads

16

4.0 GHz

Performance Core Base Frequency

3.6 GHz

4.2 GHz

Performance Core Turbo Frequency

4.3 GHz

4

Total Core Count

8

Total Thread Count

16

100 MHz

Bus Frequency

100 MHz

40x

Multiplier

36x

64 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

1 MB per core

8 MB shared

L3 Cache

11 MB shared

Yes

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2133, DDR3L-1600

Memory Types

DDR4-2666

64 GB

Max Memory Size

128 GB

2

Max Memory Channels

4

34.1 GB/s

Max Memory Bandwidth

79.47 GB/s

No

ECC Memory Support

No

Graphics Card Parameters

true

Integrated Graphics

-

1150 MHz

GPU Max Dynamic Frequency

-

Miscellaneous

Intel Core i7 6700K

Official Website

Intel Core i7 7820X

3.0

PCIe Version

3.0

16

PCIe Lanes

28

SSE4.1, SSE4.2, AVX-2

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2, AVX-512

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