Intel Core i5 6400 vs Intel Core i7 6800K

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We compared two desktop CPUs: Intel Core i5 6400 with 4 cores 2.7GHz and Intel Core i7 6800K with 6 cores 3.4GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i5 6400 's Advantages

Integrated graphics card

Lower TDP (65W vs 140W)

Intel Core i7 6800K 's Advantages

Released 8 months late

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

Larger memory bandwidth (76.8GB/s vs 34.1GB/s)

Higher base frequency (3.4GHz vs 2.7GHz)

Larger L3 cache size (15MB vs 6MB)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i5 6400

898

Intel Core i7 6800K +5%

951

Cinebench R23 Multi Core

Intel Core i5 6400

3214

Intel Core i7 6800K +106%

6632

Geekbench 6 Single Core

Intel Core i5 6400

1143

Intel Core i7 6800K +19%

1363

Geekbench 6 Multi Core

Intel Core i5 6400

3312

Intel Core i7 6800K +96%

6495

Blender

Intel Core i5 6400

41

Intel Core i7 6800K +136%

97

Geekbench 5 Single Core

Intel Core i5 6400

853

Intel Core i7 6800K +8%

922

Geekbench 5 Multi Core

Intel Core i5 6400

2805

Intel Core i7 6800K +97%

5537

Passmark CPU Single Core

Intel Core i5 6400

1961

Intel Core i7 6800K +15%

2269

Passmark CPU Multi Core

Intel Core i5 6400

5151

Intel Core i7 6800K +108%

10740

Intel Core i5 6400

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Intel Core i7 6800K

General Parameters

Sep 2015

Release Date

May 2016

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Skylake

Core Architecture

Broadwell E

i5-6400

Processor Number

i7-6800K

LGA-1151

Socket

LGA-2011-3

HD Graphics 530

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

LGA-1151

Socket

LGA-2011-3

65 W

Power Consumption

140 W

CPU Performance

4

Performance Cores

6

4

Performance Core Threads

12

2.7 GHz

Performance Core Base Frequency

3.4 GHz

3.3 GHz

Performance Core Turbo Frequency

3.6 GHz

4

Total Core Count

6

4

Total Thread Count

12

100 MHz

Bus Frequency

100 MHz

27x

Multiplier

34x

64 K per core

L1 Cache

32 K per core

256 K per core

L2 Cache

256 K per core

6 MB shared

L3 Cache

15 MB shared

No

Unlocked Multiplier

No

Memory Parameters

DDR4-2133, DDR3L-1600

Memory Types

DDR4-2133

64 GB

Max Memory Size

128 GB

2

Max Memory Channels

4

34.1 GB/s

Max Memory Bandwidth

76.8 GB/s

No

ECC Memory Support

No

Graphics Card Parameters

true

Integrated Graphics

-

950 MHz

GPU Max Dynamic Frequency

-

Miscellaneous

Intel Core i5 6400

Official Website

Intel Core i7 6800K

3.0

PCIe Version

3.0

16

PCIe Lanes

28

SSE4.1, SSE4.2, AVX-2

Extended Instruction Set

-

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