Intel Core i7 6800K vs Intel Core i7 7820X

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We compared two desktop CPUs: Intel Core i7 6800K with 6 cores 3.4GHz 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 6800K 's Advantages

Larger L3 cache size (15MB vs 11MB)

Intel Core i7 7820X 's Advantages

Released 1 years late

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

Larger memory bandwidth (79.47GB/s vs 76.8GB/s)

Higher base frequency (3.6GHz vs 3.4GHz)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i7 6800K

951

Intel Core i7 7820X +40%

1338

Cinebench R23 Multi Core

Intel Core i7 6800K

6632

Intel Core i7 7820X +101%

13358

Geekbench 6 Single Core

Intel Core i7 6800K +8%

1363

Intel Core i7 7820X

1252

Geekbench 6 Multi Core

Intel Core i7 6800K

6495

Intel Core i7 7820X +15%

7510

Geekbench 5 Single Core

Intel Core i7 6800K

922

Intel Core i7 7820X +21%

1120

Geekbench 5 Multi Core

Intel Core i7 6800K

5537

Intel Core i7 7820X +53%

8504

Passmark CPU Single Core

Intel Core i7 6800K

2269

Intel Core i7 7820X +11%

2536

Passmark CPU Multi Core

Intel Core i7 6800K

10740

Intel Core i7 7820X +60%

17189

Intel Core i7 6800K

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Intel Core i7 7820X

General Parameters

May 2016

Release Date

May 2017

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Broadwell E

Core Architecture

Skylake

i7-6800K

Processor Number

i7-7820X

LGA-2011-3

Socket

LGA-2066

N/A

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

LGA-2011-3

Socket

LGA-2066

140 W

Power Consumption

140 W

-

Peak Operating Temperature

99 °C

CPU Performance

6

Performance Cores

8

12

Performance Core Threads

16

3.4 GHz

Performance Core Base Frequency

3.6 GHz

Performance Core Turbo Frequency

4.3 GHz

6

Total Core Count

8

12

Total Thread Count

16

100 MHz

Bus Frequency

100 MHz

34x

Multiplier

36x

32 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

1 MB per core

15 MB shared

L3 Cache

11 MB shared

No

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2133

Memory Types

DDR4-2666

128 GB

Max Memory Size

128 GB

4

Max Memory Channels

4

76.8 GB/s

Max Memory Bandwidth

79.47 GB/s

No

ECC Memory Support

No

Miscellaneous

Intel Core i7 6800K

Official Website

Intel Core i7 7820X

3.0

PCIe Version

3.0

28

PCIe Lanes

28

-

Extended Instruction Set

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

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