AMD Ryzen 9 3900XT vs Intel Core i9 12900

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We compared two desktop CPUs: AMD Ryzen 9 3900XT with 12 cores 3.8GHz and Intel Core i9 12900 with 16 cores 2.4GHz . 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

Higher base frequency (3.8GHz vs 2.4GHz)

Larger L3 cache size (64MB vs 30MB)

Intel Core i9 12900 's Advantages

Released 1 years and 6 months late

Higher specification of memory (DDR5-4800 vs DDR4-3200)

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

Newer PCIe version (5 vs 4.0)

Lower TDP (65W vs 105W)

Score

Benchmark

Cinebench R23 Single Core

AMD Ryzen 9 3900XT

1352

Intel Core i9 12900 +47%

1988

Cinebench R23 Multi Core

AMD Ryzen 9 3900XT

18436

Intel Core i9 12900 +43%

26454

Geekbench 6 Single Core

AMD Ryzen 9 3900XT

1763

Intel Core i9 12900 +54%

2727

Geekbench 6 Multi Core

AMD Ryzen 9 3900XT

11025

Intel Core i9 12900 +21%

13396

AMD Ryzen 9 3900XT

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Intel Core i9 12900

General Parameters

Jul 2020

Release Date

Jan 2022

Amd

Manufacturer

Intel

Desktop

Type

Desktop

x86-64

Instruction Set

-

Zen 2 (Matisse)

Core Architecture

Alder Lake-S

AM4

Socket

Intel Socket 1700

No

Integrated Graphics

UHD Graphics 770

-

Generation

Core i9 (Alder Lake-S)

Package

3.8 billions

Transistor Count

-

7 nm

Manufacturing Process

10 nm

AM4

Socket

Intel Socket 1700

105 W

Power Consumption

65 W

95°C

Peak Operating Temperature

72 °C

-

Foundry

Intel

-

Die Size

215 mm²

-

Package

FC-LGA16A

CPU Performance

12

Performance Cores

8

24

Performance Core Threads

16

3.8 GHz

Performance Core Base Frequency

2.4 GHz

4.7 GHz

Performance Core Turbo Frequency

5.1 GHz

-

Efficiency Cores

8

-

Efficiency Core Threads

8

-

Efficiency Core Base Frequency

1800 MHz

-

Efficiency Core Turbo Frequency

3.8 GHz

12

Total Core Count

16

24

Total Thread Count

24

100 MHz

Bus Frequency

100 MHz

38x

Multiplier

24.0

64 K per core

L1 Cache

80 KB per core

512 K per core

L2 Cache

1.25 MB per core

64 MB shared

L3 Cache

30 MB shared

Yes

Unlocked Multiplier

Yes

-

SMP

1

Memory Parameters

DDR4-3200

Memory Types

DDR4-3200, DDR5-4800

128 GB

Max Memory Size

-

2

Max Memory Channels

2

47.68 GB/s

Max Memory Bandwidth

76.8 GB/s

Yes

ECC Memory Support

No

Miscellaneous

AMD Ryzen 9 3900XT

Official Website

-

4.0

PCIe Version

5

24

PCIe Lanes

20

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