Intel Core i5 6400 vs Intel Core i7 7740X

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We compared two desktop CPUs: Intel Core i5 6400 with 4 cores 2.7GHz and Intel Core i7 7740X with 4 cores 4.3GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i5 6400 's Advantages

Integrated graphics card

Lower TDP (65W vs 112W)

Intel Core i7 7740X 's Advantages

Released 1 years and 8 months late

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

Larger memory bandwidth (42.7GB/s vs 34.1GB/s)

Higher base frequency (4.3GHz vs 2.7GHz)

Larger L3 cache size (8MB vs 6MB)

Score

Benchmark

Geekbench 6 Single Core

Intel Core i5 6400

1143

Intel Core i7 7740X +35%

1553

Geekbench 6 Multi Core

Intel Core i5 6400

3312

Intel Core i7 7740X +66%

5516

Geekbench 5 Single Core

Intel Core i5 6400

853

Intel Core i7 7740X +51%

1291

Geekbench 5 Multi Core

Intel Core i5 6400

2805

Intel Core i7 7740X +78%

5001

Passmark CPU Single Core

Intel Core i5 6400

1961

Intel Core i7 7740X +40%

2759

Passmark CPU Multi Core

Intel Core i5 6400

5151

Intel Core i7 7740X +90%

9824

Intel Core i5 6400

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Intel Core i7 7740X

General Parameters

Sep 2015

Release Date

May 2017

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Skylake

Core Architecture

Kaby Lake

i5-6400

Processor Number

i7-7740X

LGA-1151

Socket

LGA-2066

HD Graphics 530

Integrated Graphics

N/A

Package

14 nm

Manufacturing Process

14 nm

LGA-1151

Socket

LGA-2066

65 W

Power Consumption

112 W

-

Peak Operating Temperature

100 °C

CPU Performance

4

Performance Cores

4

Performance Core Threads

8

2.7 GHz

Performance Core Base Frequency

4.3 GHz

3.3 GHz

Performance Core Turbo Frequency

4.5 GHz

4

Total Core Count

4

Total Thread Count

8

100 MHz

Bus Frequency

-

27x

Multiplier

43x

64 K per core

L1 Cache

64 K per core

256 K per core

L2 Cache

256 K per core

6 MB shared

L3 Cache

8 MB shared

No

Unlocked Multiplier

Yes

Memory Parameters

DDR4-2133, DDR3L-1600

Memory Types

DDR4-2666

64 GB

Max Memory Size

64 GB

2

Max Memory Channels

2

34.1 GB/s

Max Memory Bandwidth

42.7 GB/s

No

ECC Memory Support

No

Graphics Card Parameters

true

Integrated Graphics

-

950 MHz

GPU Max Dynamic Frequency

-

Miscellaneous

Intel Core i5 6400

Official Website

Intel Core i7 7740X

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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