Intel Core i7 7740X vs Intel Core i5 8400

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We compared two desktop CPUs: Intel Core i7 7740X with 4 cores 4.3GHz and Intel Core i5 8400 with 6 cores 2.8GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i7 7740X 's Advantages

Larger memory bandwidth (42.7GB/s vs 41.6GB/s)

Higher base frequency (4.3GHz vs 2.8GHz)

Intel Core i5 8400 's Advantages

Integrated graphics card

Larger L3 cache size (9MB vs 8MB)

Lower TDP (65W vs 112W)

Score

Benchmark

Geekbench 6 Single Core

Intel Core i7 7740X +19%

1553

Intel Core i5 8400

1298

Geekbench 6 Multi Core

Intel Core i7 7740X +17%

5516

Intel Core i5 8400

4677

Geekbench 5 Single Core

Intel Core i7 7740X +25%

1291

Intel Core i5 8400

1032

Geekbench 5 Multi Core

Intel Core i7 7740X +8%

5001

Intel Core i5 8400

4611

Passmark CPU Single Core

Intel Core i7 7740X +15%

2759

Intel Core i5 8400

2387

Passmark CPU Multi Core

Intel Core i7 7740X +6%

9824

Intel Core i5 8400

9214

Intel Core i7 7740X

VS

Intel Core i5 8400

General Parameters

May 2017

Release Date

Oct 2017

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Kaby Lake

Core Architecture

Coffee Lake

i7-7740X

Processor Number

i5-8400

LGA-2066

Socket

LGA-1151

N/A

Integrated Graphics

UHD Graphics 630

Package

14 nm

Manufacturing Process

14 nm

LGA-2066

Socket

LGA-1151

112 W

Power Consumption

65 W

100 °C

Peak Operating Temperature

100 °C

CPU Performance

4

Performance Cores

6

8

Performance Core Threads

6

4.3 GHz

Performance Core Base Frequency

2.8 GHz

4.5 GHz

Performance Core Turbo Frequency

4 GHz

4

Total Core Count

6

8

Total Thread Count

6

-

Bus Frequency

100 MHz

43x

Multiplier

28x

64 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

256 K per core

8 MB shared

L3 Cache

9 MB shared

Yes

Unlocked Multiplier

No

Memory Parameters

DDR4-2666

Memory Types

DDR4-2666

64 GB

Max Memory Size

128 GB

2

Max Memory Channels

2

42.7 GB/s

Max Memory Bandwidth

41.6 GB/s

No

ECC Memory Support

No

Graphics Card Parameters

-

Integrated Graphics

true

-

GPU Base Frequency

350 MHz

-

GPU Max Dynamic Frequency

1050 MHz

-

Shader Units

192

-

Texture Units

24

-

Raster Operation Units

3

-

Execution Units

24

-

Power Consumption

15 W

-

Max Resolution

4096x2304 - 60 Hz

-

Graphics Performance

0.38 TFLOPS

Miscellaneous

Intel Core i7 7740X

Official Website

Intel Core i5 8400

3.0

PCIe Version

3.0

16

PCIe Lanes

16

SSE4.1, SSE4.2, AVX-2

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2

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