Intel Core i9 12900KF vs AMD Ryzen 9 3900XT

VS

Intel Core i9 12900KF

AMD Ryzen 9 3900XT

We compared two desktop CPUs: Intel Core i9 12900KF with 16 cores 3.2GHz and AMD Ryzen 9 3900XT with 12 cores 3.8GHz . You will find out which processor performs better in benchmark tests, key specifications, power consumption and more.

Main Differences

Intel Core i9 12900KF 's Advantages

Released 1 years and 3 months late

Higher specification of memory (4800 vs 3200)

Larger memory bandwidth (76.8GB/s vs 47.68GB/s)

Newer PCIe version (5.0 vs 4.0)

AMD Ryzen 9 3900XT 's Advantages

Higher base frequency (3.8GHz vs 3.2GHz)

Larger L3 cache size (64MB vs 30MB)

More modern manufacturing process (7nm vs 10nm)

Lower TDP (105W vs 125W)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i9 12900KF +50%

2028

AMD Ryzen 9 3900XT

1350

Cinebench R23 Multi Core

Intel Core i9 12900KF +48%

27422

AMD Ryzen 9 3900XT

18437

Geekbench 6 Single Core

Intel Core i9 12900KF +52%

2686

AMD Ryzen 9 3900XT

1763

Geekbench 6 Multi Core

Intel Core i9 12900KF +46%

16130

AMD Ryzen 9 3900XT

11025

Cinebench 2024 Single Core

Intel Core i9 12900KF +56%

124

AMD Ryzen 9 3900XT

79

Cinebench 2024 Multi Core

Intel Core i9 12900KF +45%

1564

AMD Ryzen 9 3900XT

1074

Blender

Intel Core i9 12900KF +62%

425

AMD Ryzen 9 3900XT

261

Geekbench 5 Single Core

Intel Core i9 12900KF +50%

1970

AMD Ryzen 9 3900XT

1311

Geekbench 5 Multi Core

Intel Core i9 12900KF +42%

17469

AMD Ryzen 9 3900XT

12279

Passmark CPU Single Core

Intel Core i9 12900KF +50%

4167

AMD Ryzen 9 3900XT

2769

Passmark CPU Multi Core

Intel Core i9 12900KF +25%

41190

AMD Ryzen 9 3900XT

32856

Intel Core i9 12900KF

VS

AMD Ryzen 9 3900XT

General Parameters

Oct 2021

Release Date

Jul 2020

Intel

Manufacturer

AMD

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Alder Lake

Core Architecture

Zen 2 (Matisse)

i9-12900KF

Processor Number

-

LGA-1700

Socket

AM4

No

Integrated Graphics

No

Package

-

Transistor Count

3.8 billions

10 nm

Manufacturing Process

7 nm

125 W

Power Consumption

105 W

241 W

Max Turbo Power Consumption

-

100°C

Peak Operating Temperature

95°C

CPU Performance

8

Performance Cores

12

16

Performance Core Threads

24

3.2 GHz

Performance Core Base Frequency

3.8 GHz

5.1 GHz

Performance Core Turbo Frequency

4.7 GHz

8

Efficiency Cores

-

8

Efficiency Core Threads

-

2.4 GHz

Efficiency Core Base Frequency

-

3.9 GHz

Efficiency Core Turbo Frequency

-

16

Total Core Count

12

24

Total Thread Count

24

100 MHz

Bus Frequency

100 MHz

32x

Multiplier

38x

64 K per core

L1 Cache

64 K per core

14 MB shared

L2 Cache

512 K per core

30 MB shared

L3 Cache

64 MB shared

Yes

Unlocked Multiplier

Yes

Memory Parameters

DDR5-4800, DDR4-3200

Memory Types

DDR4-3200

128 GB

Max Memory Size

128 GB

2

Max Memory Channels

2

76.8 GB/s

Max Memory Bandwidth

47.68 GB/s

Yes

ECC Memory Support

Yes

Miscellaneous

Intel Core i9 12900KF

Official Website

AMD Ryzen 9 3900XT

5.0

PCIe Version

4.0

20

PCIe Lanes

24

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