Intel Core i5 6400 vs Intel Core i7 7800X

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We compared two desktop CPUs: Intel Core i5 6400 with 4 cores 2.7GHz and Intel Core i7 7800X with 6 cores 3.5GHz . 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 7800X 's Advantages

Released 1 years and 8 months late

Higher specification of memory (DDR4-2400 vs DDR4-2133)

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

Higher base frequency (3.5GHz vs 2.7GHz)

Larger L3 cache size (8MB vs 6MB)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i5 6400

898

Intel Core i7 7800X +7%

963

Cinebench R23 Multi Core

Intel Core i5 6400

3214

Intel Core i7 7800X +126%

7269

Geekbench 6 Single Core

Intel Core i5 6400

1143

Intel Core i7 7800X +19%

1362

Geekbench 6 Multi Core

Intel Core i5 6400

3312

Intel Core i7 7800X +83%

6082

Geekbench 5 Single Core

Intel Core i5 6400

853

Intel Core i7 7800X +25%

1069

Geekbench 5 Multi Core

Intel Core i5 6400

2805

Intel Core i7 7800X +134%

6578

Passmark CPU Single Core

Intel Core i5 6400

1961

Intel Core i7 7800X +22%

2409

Passmark CPU Multi Core

Intel Core i5 6400

5151

Intel Core i7 7800X +150%

12894

Intel Core i5 6400

VS

Intel Core i7 7800X

General Parameters

Sep 2015

Release Date

May 2017

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Skylake

Core Architecture

Skylake

i5-6400

Processor Number

i7-7800X

LGA-1151

Socket

LGA-2066

HD Graphics 530

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

LGA-1151

Socket

LGA-2066

65 W

Power Consumption

140 W

-

Peak Operating Temperature

100 °C

CPU Performance

4

Performance Cores

6

4

Performance Core Threads

12

2.7 GHz

Performance Core Base Frequency

3.5 GHz

3.3 GHz

Performance Core Turbo Frequency

4 GHz

4

Total Core Count

6

4

Total Thread Count

12

100 MHz

Bus Frequency

100 MHz

27x

Multiplier

35x

64 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

1 MB per core

6 MB shared

L3 Cache

8 MB shared

No

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2133, DDR3L-1600

Memory Types

DDR4-2400

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

-

950 MHz

GPU Max Dynamic Frequency

-

Miscellaneous

Intel Core i5 6400

Official Website

Intel Core i7 7800X

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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