Intel Core i9 7900X vs Intel Core i5 6400

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We compared two desktop CPUs: Intel Core i9 7900X with 10 cores 3.3GHz 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 i9 7900X 's Advantages

Released 1 years and 8 months late

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

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

Higher base frequency (3.3GHz vs 2.7GHz)

Larger L3 cache size (14MB vs 6MB)

Intel Core i5 6400 's Advantages

Integrated graphics card

Lower TDP (65W vs 140W)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i9 7900X +33%

1203

Intel Core i5 6400

898

Cinebench R23 Multi Core

Intel Core i9 7900X +267%

11804

Intel Core i5 6400

3214

Geekbench 6 Single Core

Intel Core i9 7900X +15%

1323

Intel Core i5 6400

1143

Geekbench 6 Multi Core

Intel Core i9 7900X +157%

8536

Intel Core i5 6400

3312

Geekbench 5 Single Core

Intel Core i9 7900X +32%

1127

Intel Core i5 6400

853

Geekbench 5 Multi Core

Intel Core i9 7900X +263%

10189

Intel Core i5 6400

2805

Passmark CPU Single Core

Intel Core i9 7900X +30%

2556

Intel Core i5 6400

1961

Passmark CPU Multi Core

Intel Core i9 7900X +307%

20991

Intel Core i5 6400

5151

Intel Core i9 7900X

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Intel Core i5 6400

General Parameters

May 2017

Release Date

Sep 2015

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Skylake

Core Architecture

Skylake

i9-7900X

Processor Number

i5-6400

LGA-2066

Socket

LGA-1151

N/A

Integrated Graphics

HD Graphics 530

Package

14 nm

Manufacturing Process

14 nm

LGA-2066

Socket

LGA-1151

140 W

Power Consumption

65 W

95 °C

Peak Operating Temperature

-

CPU Performance

10

Performance Cores

4

20

Performance Core Threads

4

3.3 GHz

Performance Core Base Frequency

2.7 GHz

4.3 GHz

Performance Core Turbo Frequency

3.3 GHz

10

Total Core Count

4

20

Total Thread Count

4

100 MHz

Bus Frequency

100 MHz

33x

Multiplier

27x

64 K per core

L1 Cache

64 K per core

1 MB per core

L2 Cache

256 K per core

14 MB shared

L3 Cache

6 MB shared

Yes

Unlocked Multiplier

No

Memory Parameters

DDR4-2666

Memory Types

DDR4-2133, DDR3L-1600

128 GB

Max Memory Size

64 GB

4

Max Memory Channels

2

79.47 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 i9 7900X

Official Website

Intel Core i5 6400

3.0

PCIe Version

3.0

44

PCIe Lanes

16

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

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2

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