Intel Core i7 6800K vs Intel Core i5 6400

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We compared two desktop CPUs: Intel Core i7 6800K with 6 cores 3.4GHz and Intel Core i5 6400 with 4 cores 2.7GHz . 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

Released 8 months late

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)

Intel Core i5 6400 's Advantages

Integrated graphics card

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

Lower TDP (65W vs 140W)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i7 6800K +5%

951

Intel Core i5 6400

898

Cinebench R23 Multi Core

Intel Core i7 6800K +106%

6632

Intel Core i5 6400

3214

Geekbench 6 Single Core

Intel Core i7 6800K +19%

1363

Intel Core i5 6400

1143

Geekbench 6 Multi Core

Intel Core i7 6800K +96%

6495

Intel Core i5 6400

3312

Blender

Intel Core i7 6800K +136%

97

Intel Core i5 6400

41

Geekbench 5 Single Core

Intel Core i7 6800K +8%

922

Intel Core i5 6400

853

Geekbench 5 Multi Core

Intel Core i7 6800K +97%

5537

Intel Core i5 6400

2805

Passmark CPU Single Core

Intel Core i7 6800K +15%

2269

Intel Core i5 6400

1961

Passmark CPU Multi Core

Intel Core i7 6800K +108%

10740

Intel Core i5 6400

5151

Intel Core i7 6800K

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Intel Core i5 6400

General Parameters

May 2016

Release Date

Sep 2015

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Broadwell E

Core Architecture

Skylake

i7-6800K

Processor Number

i5-6400

LGA-2011-3

Socket

LGA-1151

N/A

Integrated Graphics

HD Graphics 530

Package

14 nm

Manufacturing Process

14 nm

LGA-2011-3

Socket

LGA-1151

140 W

Power Consumption

65 W

CPU Performance

6

Performance Cores

4

12

Performance Core Threads

4

3.4 GHz

Performance Core Base Frequency

2.7 GHz

3.6 GHz

Performance Core Turbo Frequency

3.3 GHz

6

Total Core Count

4

12

Total Thread Count

4

100 MHz

Bus Frequency

100 MHz

34x

Multiplier

27x

32 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

256 K per core

15 MB shared

L3 Cache

6 MB shared

No

Unlocked Multiplier

No

Memory Parameters

DDR4-2133

Memory Types

DDR4-2133, DDR3L-1600

128 GB

Max Memory Size

64 GB

4

Max Memory Channels

2

76.8 GB/s

Max Memory Bandwidth

34.1 GB/s

No

ECC Memory Support

No

Graphics Card Parameters

-

Integrated Graphics

true

-

GPU Max Dynamic Frequency

950 MHz

Miscellaneous

Intel Core i7 6800K

Official Website

Intel Core i5 6400

3.0

PCIe Version

3.0

28

PCIe Lanes

16

-

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2

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