AMD Ryzen 9 7900X vs Intel Core i5 6400

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We compared two desktop CPUs: AMD Ryzen 9 7900X with 12 cores 4.7GHz 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

AMD Ryzen 9 7900X 's Advantages

Released 7 years late

Higher specification of memory (DDR5-5200 vs DDR4-2133)

Larger memory bandwidth (83.2GB/s vs 34.1GB/s)

Newer PCIe version (5.0 vs 3.0)

Higher base frequency (4.7GHz vs 2.7GHz)

Larger L3 cache size (64MB vs 6MB)

Intel Core i5 6400 's Advantages

Lower TDP (65W vs 170W)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 9 7900X +126%

2033

Intel Core i5 6400

898

Cinebench R23 Multi Core

AMD Ryzen 9 7900X +809%

29242

Intel Core i5 6400

3214

Geekbench 6 Single Core

AMD Ryzen 9 7900X +157%

2942

Intel Core i5 6400

1143

Geekbench 6 Multi Core

AMD Ryzen 9 7900X +476%

19092

Intel Core i5 6400

3312

Blender

AMD Ryzen 9 7900X +890%

406

Intel Core i5 6400

41

Geekbench 5 Single Core

AMD Ryzen 9 7900X +166%

2277

Intel Core i5 6400

853

Geekbench 5 Multi Core

AMD Ryzen 9 7900X +630%

20503

Intel Core i5 6400

2805

Passmark CPU Single Core

AMD Ryzen 9 7900X +120%

4317

Intel Core i5 6400

1961

Passmark CPU Multi Core

AMD Ryzen 9 7900X +909%

52013

Intel Core i5 6400

5151

AMD Ryzen 9 7900X

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Intel Core i5 6400

General Parameters

Sep 2022

Release Date

Sep 2015

AMD

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Raphael

Core Architecture

Skylake

-

Processor Number

i5-6400

AM5

Socket

LGA-1151

AMD Radeon™ Graphics

Integrated Graphics

HD Graphics 530

Package

5 nm

Manufacturing Process

14 nm

AM5

Socket

LGA-1151

170 W

Power Consumption

65 W

95 °C

Peak Operating Temperature

-

CPU Performance

12

Performance Cores

4

24

Performance Core Threads

4

4.7 GHz

Performance Core Base Frequency

2.7 GHz

5.6 GHz

Performance Core Turbo Frequency

3.3 GHz

12

Total Core Count

4

24

Total Thread Count

4

100 MHz

Bus Frequency

100 MHz

47x

Multiplier

27x

-

L1 Cache

64 K per core

12 MB shared

L2 Cache

256 K per core

64 MB shared

L3 Cache

6 MB shared

Yes

Unlocked Multiplier

No

Memory Parameters

DDR5-5200

Memory Types

DDR4-2133, DDR3L-1600

128 GB

Max Memory Size

64 GB

2

Max Memory Channels

2

83.2 GB/s

Max Memory Bandwidth

34.1 GB/s

-

ECC Memory Support

No

Graphics Card Parameters

true

Integrated Graphics

true

-

GPU Max Dynamic Frequency

950 MHz

Miscellaneous

AMD Ryzen 9 7900X

Official Website

Intel Core i5 6400

5.0

PCIe Version

3.0

24

PCIe Lanes

16

-

Extended Instruction Set

SSE4.1, SSE4.2, AVX-2

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