Intel Core i5 8400 vs Intel Core i9 9900X

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We compared two desktop CPUs: Intel Core i5 8400 with 6 cores 2.8GHz and Intel Core i9 9900X with 10 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 8400 's Advantages

Integrated graphics card

Lower TDP (65W vs 165W)

Intel Core i9 9900X 's Advantages

Released 1 years late

Larger memory bandwidth (85GB/s vs 41.6GB/s)

Higher base frequency (3.5GHz vs 2.8GHz)

Larger L3 cache size (20MB vs 9MB)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i5 8400

1038

Intel Core i9 9900X +13%

1178

Cinebench R23 Multi Core

Intel Core i5 8400

5893

Intel Core i9 9900X +136%

13952

Geekbench 6 Single Core

Intel Core i5 8400

1298

Intel Core i9 9900X +12%

1455

Geekbench 6 Multi Core

Intel Core i5 8400

4677

Intel Core i9 9900X +119%

10273

Geekbench 5 Single Core

Intel Core i5 8400

1032

Intel Core i9 9900X +12%

1165

Geekbench 5 Multi Core

Intel Core i5 8400

4611

Intel Core i9 9900X +132%

10704

Passmark CPU Single Core

Intel Core i5 8400

2387

Intel Core i9 9900X +7%

2565

Passmark CPU Multi Core

Intel Core i5 8400

9214

Intel Core i9 9900X +136%

21833

Intel Core i5 8400

VS

Intel Core i9 9900X

General Parameters

Oct 2017

Release Date

Oct 2018

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Coffee Lake

Core Architecture

Skylake

i5-8400

Processor Number

i9-9900X

LGA-1151

Socket

LGA-2066

UHD Graphics 630

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

LGA-1151

Socket

LGA-2066

65 W

Power Consumption

165 W

100 °C

Peak Operating Temperature

92 °C

CPU Performance

6

Performance Cores

10

6

Performance Core Threads

20

2.8 GHz

Performance Core Base Frequency

3.5 GHz

4 GHz

Performance Core Turbo Frequency

4.4 GHz

6

Total Core Count

10

6

Total Thread Count

20

100 MHz

Bus Frequency

100 MHz

28x

Multiplier

35x

64 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

1 MB per core

9 MB shared

L3 Cache

20 MB shared

No

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2666

Memory Types

DDR4-2666

128 GB

Max Memory Size

128 GB

2

Max Memory Channels

4

41.6 GB/s

Max Memory Bandwidth

85 GB/s

No

ECC Memory Support

No

Graphics Card Parameters

true

Integrated Graphics

-

350 MHz

GPU Base Frequency

-

1050 MHz

GPU Max Dynamic Frequency

-

192

Shader Units

-

24

Texture Units

-

3

Raster Operation Units

-

24

Execution Units

-

15 W

Power Consumption

-

4096x2304 - 60 Hz

Max Resolution

-

0.38 TFLOPS

Graphics Performance

-

Miscellaneous

Intel Core i5 8400

Official Website

Intel Core i9 9900X

3.0

PCIe Version

3.0

16

PCIe Lanes

44

SSE4.1, SSE4.2, AVX-2

Extended Instruction Set

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

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