AMD Ryzen 9 3900XT vs AMD Ryzen 5 8400F

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We compared two desktop CPUs: AMD Ryzen 9 3900XT with 12 cores 3.8GHz and AMD Ryzen 5 8400F with 6 cores 4.2GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

AMD Ryzen 9 3900XT 's Advantages

Larger L3 cache size (64MB vs 16MB)

AMD Ryzen 5 8400F 's Advantages

Released 3 years and 9 months late

Higher specification of memory (DDR5-5200 vs DDR4-3200)

Larger memory bandwidth (83.2GB/s vs 47.68GB/s)

Newer PCIe version (4 vs 4.0)

Higher base frequency (4.2GHz vs 3.8GHz)

Lower TDP (65W vs 105W)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 9 3900XT

1352

AMD Ryzen 5 8400F +25%

1691

Cinebench R23 Multi Core

AMD Ryzen 9 3900XT +37%

18436

AMD Ryzen 5 8400F

13361

AMD Ryzen 9 3900XT

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AMD Ryzen 5 8400F

General Parameters

Jul 2020

Release Date

Apr 2024

Amd

Manufacturer

AMD

Desktop

Type

Desktop

x86-64

Instruction Set

-

Zen 2 (Matisse)

Core Architecture

Phoenix

AM4

Socket

AMD Socket AM5

No

Integrated Graphics

N/A

-

Generation

Ryzen 5 (Zen 4 (Phoenix))

Package

3.8 billions

Transistor Count

25 billions

7 nm

Manufacturing Process

4 nm

AM4

Socket

AMD Socket AM5

105 W

Power Consumption

65 W

95°C

Peak Operating Temperature

-

Foundry

TSMC

-

Die Size

178 mm²

-

Package

FC-LGA1718

CPU Performance

12

Performance Cores

-

24

Performance Core Threads

-

3.8 GHz

Performance Core Base Frequency

4.2 GHz

4.7 GHz

Performance Core Turbo Frequency

4.7 GHz

12

Total Core Count

6

24

Total Thread Count

12

100 MHz

Bus Frequency

100 MHz

38x

Multiplier

42.0

64 K per core

L1 Cache

64 KB per core

512 K per core

L2 Cache

1 MB per core

64 MB shared

L3 Cache

16 MB

Yes

Unlocked Multiplier

Yes

-

SMP

1

Memory Parameters

DDR4-3200

Memory Types

DDR5-5200

128 GB

Max Memory Size

256 GB

2

Max Memory Channels

2

47.68 GB/s

Max Memory Bandwidth

83.2 GB/s

Yes

ECC Memory Support

No

Miscellaneous

AMD Ryzen 9 3900XT

Official Website

AMD Ryzen 5 8400F

4.0

PCIe Version

4

24

PCIe Lanes

20

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