Intel Core i9 12900KS vs AMD Ryzen 9 3900X

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We compared two desktop CPUs: Intel Core i9 12900KS with 16 cores 3.4GHz and AMD Ryzen 9 3900X 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 12900KS 's Advantages

Released 2 years and 9 months late

Integrated graphics card

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

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

Newer PCIe version (5.0 vs 4.0)

AMD Ryzen 9 3900X 's Advantages

Higher base frequency (3.8GHz vs 3.4GHz)

Larger L3 cache size (64MB vs 30MB)

Lower TDP (105W vs 150W)

Score

Benchmark

Cinebench R23 Single Core

Intel Core i9 12900KS +58%

2082

AMD Ryzen 9 3900X

1313

Cinebench R23 Multi Core

Intel Core i9 12900KS +48%

27796

AMD Ryzen 9 3900X

18656

Geekbench 6 Single Core

Intel Core i9 12900KS +38%

2559

AMD Ryzen 9 3900X

1842

Geekbench 6 Multi Core

Intel Core i9 12900KS +32%

15546

AMD Ryzen 9 3900X

11715

Geekbench 5 Single Core

Intel Core i9 12900KS +54%

2041

AMD Ryzen 9 3900X

1319

Geekbench 5 Multi Core

Intel Core i9 12900KS +47%

17685

AMD Ryzen 9 3900X

11991

Passmark CPU Single Core

Intel Core i9 12900KS +62%

4357

AMD Ryzen 9 3900X

2683

Passmark CPU Multi Core

Intel Core i9 12900KS +36%

44470

AMD Ryzen 9 3900X

32531

Intel Core i9 12900KS

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AMD Ryzen 9 3900X

General Parameters

Apr 2022

Release Date

Jul 2019

Intel

Manufacturer

AMD

Desktop

Type

Desktop

x86-64

Instruction Set

x86-64

Alder Lake-S

Core Architecture

Zen 2

i9-12900KS

Processor Number

-

LGA-1700

Socket

AM4

UHD Graphics 770

Integrated Graphics

N/A

Package

-

Transistor Count

3.8 billions

10 nm

Manufacturing Process

7 nm

LGA-1700

Socket

AM4

150 W

Power Consumption

105 W

100 °C

Peak Operating Temperature

95 °C

CPU Performance

8

Performance Cores

12

-

Performance Core Threads

24

3.4 GHz

Performance Core Base Frequency

3.8 GHz

5.5 GHz

Performance Core Turbo Frequency

4.6 GHz

8

Efficiency Cores

-

16

Total Core Count

12

24

Total Thread Count

24

100 MHz

Bus Frequency

100 MHz

34x

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

Graphics Card Parameters

true

Integrated Graphics

-

300 MHz

GPU Base Frequency

-

1550 MHz

GPU Max Dynamic Frequency

-

256

Shader Units

-

16

Texture Units

-

8

Raster Operation Units

-

32

Execution Units

-

15 W

Power Consumption

-

0.78 TFLOPS

Graphics Performance

-

Miscellaneous

Intel Core i9 12900KS

Official Website

AMD Ryzen 9 3900X

5.0

PCIe Version

4.0

20

PCIe Lanes

16

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