Intel Core i5 8400 vs Intel Core i7 9800X

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We compared two desktop CPUs: Intel Core i5 8400 with 6 cores 2.8GHz and Intel Core i7 9800X with 8 cores 3.8GHz . 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 i7 9800X 's Advantages

Released 1 years late

Larger memory bandwidth (79.47GB/s vs 41.6GB/s)

Higher base frequency (3.8GHz vs 2.8GHz)

Larger L3 cache size (17MB vs 9MB)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i5 8400

1038

Intel Core i7 9800X +20%

1251

Cinebench R23 Multi Core

Intel Core i5 8400

5893

Intel Core i7 9800X +119%

12945

Geekbench 6 Single Core

Intel Core i5 8400

1298

Intel Core i7 9800X +1%

1314

Geekbench 6 Multi Core

Intel Core i5 8400

4677

Intel Core i7 9800X +70%

7991

Geekbench 5 Single Core

Intel Core i5 8400

1032

Intel Core i7 9800X +18%

1225

Geekbench 5 Multi Core

Intel Core i5 8400

4611

Intel Core i7 9800X +109%

9648

Passmark CPU Single Core

Intel Core i5 8400

2387

Intel Core i7 9800X +7%

2573

Passmark CPU Multi Core

Intel Core i5 8400

9214

Intel Core i7 9800X +96%

18121

Intel Core i5 8400

VS

Intel Core i7 9800X

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

i7-9800X

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

95 °C

CPU Performance

6

Performance Cores

8

6

Performance Core Threads

16

2.8 GHz

Performance Core Base Frequency

3.8 GHz

4 GHz

Performance Core Turbo Frequency

4.4 GHz

6

Total Core Count

8

6

Total Thread Count

16

100 MHz

Bus Frequency

100 MHz

28x

Multiplier

38x

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

17 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

79.47 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 i7 9800X

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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