Intel Core i5 8400T vs Intel Core i9 9940X

VS

Intel Core i5 8400T

Intel Core i9 9940X

We compared two desktop CPUs: Intel Core i5 8400T with 6 cores 1.7GHz and Intel Core i9 9940X with 14 cores 3.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i5 8400T 's Advantages

Integrated graphics card

Lower TDP (35W vs 165W)

Intel Core i9 9940X 's Advantages

Released 6 months late

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

Higher base frequency (3.3GHz vs 1.7GHz)

Larger L3 cache size (20MB vs 9MB)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i5 8400T

774

Intel Core i9 9940X +58%

1228

Cinebench R23 Multi Core

Intel Core i5 8400T

3638

Intel Core i9 9940X +321%

15351

Geekbench 6 Single Core

Intel Core i5 8400T

1120

Intel Core i9 9940X +18%

1328

Geekbench 6 Multi Core

Intel Core i5 8400T

3670

Intel Core i9 9940X +166%

9787

Geekbench 5 Single Core

Intel Core i5 8400T

886

Intel Core i9 9940X +34%

1189

Geekbench 5 Multi Core

Intel Core i5 8400T

4000

Intel Core i9 9940X +259%

14374

Passmark CPU Single Core

Intel Core i5 8400T

1917

Intel Core i9 9940X +36%

2608

Passmark CPU Multi Core

Intel Core i5 8400T

7447

Intel Core i9 9940X +280%

28355

Intel Core i5 8400T

VS

Intel Core i9 9940X

General Parameters

Apr 2018

Release Date

Oct 2018

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Coffee Lake

Core Architecture

Skylake

i5-8400T

Processor Number

i9-9940X

LGA-1151

Socket

LGA-2066

UHD Graphics 630

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

35 W

Power Consumption

165 W

100 °C

Peak Operating Temperature

88 °C

CPU Performance

6

Performance Cores

14

6

Performance Core Threads

28

1.7 GHz

Performance Core Base Frequency

3.3 GHz

Performance Core Turbo Frequency

4.4 GHz

6

Total Core Count

14

6

Total Thread Count

28

100 MHz

Bus Frequency

100 MHz

17x

Multiplier

33x

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 8400T

Official Website

Intel Core i9 9940X

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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