Intel Core i5 7640X vs Intel Core i5 6400

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We compared two desktop CPUs: Intel Core i5 7640X with 4 cores 4.0GHz and Intel Core i5 6400 with 4 cores 2.7GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i5 7640X '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 (4.0GHz vs 2.7GHz)

Intel Core i5 6400 's Advantages

Integrated graphics card

Lower TDP (65W vs 112W)

Score

Benchmark

Geekbench 6 Single Core

Intel Core i5 7640X +24%

1419

Intel Core i5 6400

1143

Geekbench 6 Multi Core

Intel Core i5 7640X +12%

3726

Intel Core i5 6400

3312

Geekbench 5 Single Core

Intel Core i5 7640X +45%

1237

Intel Core i5 6400

853

Geekbench 5 Multi Core

Intel Core i5 7640X +50%

4230

Intel Core i5 6400

2805

Passmark CPU Single Core

Intel Core i5 7640X +27%

2505

Intel Core i5 6400

1961

Passmark CPU Multi Core

Intel Core i5 7640X +30%

6735

Intel Core i5 6400

5151

Intel Core i5 7640X

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Intel Core i5 6400

General Parameters

May 2017

Release Date

Sep 2015

Intel

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Kaby Lake

Core Architecture

Skylake

i5-7640X

Processor Number

i5-6400

LGA-2066

Socket

LGA-1151

N/A

Integrated Graphics

HD Graphics 530

Package

14 nm

Manufacturing Process

14 nm

LGA-2066

Socket

LGA-1151

112 W

Power Consumption

65 W

100 °C

Peak Operating Temperature

-

CPU Performance

4

Performance Cores

4

Performance Core Threads

4

4.0 GHz

Performance Core Base Frequency

2.7 GHz

4.2 GHz

Performance Core Turbo Frequency

3.3 GHz

4

Total Core Count

4

Total Thread Count

4

-

Bus Frequency

100 MHz

39x

Multiplier

27x

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

6 MB shared

Yes

Unlocked Multiplier

No

Memory Parameters

DDR4-2666

Memory Types

DDR4-2133, DDR3L-1600

64 GB

Max Memory Size

64 GB

2

Max Memory Channels

2

42.7 GB/s

Max Memory Bandwidth

34.1 GB/s

No

ECC Memory Support

No

Graphics Card Parameters

-

Integrated Graphics

true

-

GPU Max Dynamic Frequency

950 MHz

Miscellaneous

Intel Core i5 7640X

Official Website

Intel Core i5 6400

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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