intel core i9 12900k vs amd ryzen 9 3900x

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We compared two CPUs Intel Core i9 12900K (Desktop) 16-cores against AMD Ryzen 9 3900X (Desktop) 12-cores. In this comparison page, we check which of these two processor has better performance in benchmark results, Games, architecture, price and other useful information.

Review

General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Performance
Measure performance when all cores are involved

Key Differences

What are the key differences between Intel Core i9 12900K and AMD Ryzen 9 3900X
Advantages of Intel Core i9 12900K
  • Newer released 2 years later
  • Has 4 more physical cores
  • Around 25.6 GB/s (33%) higher theoretical memory bandwidth
  • 12% higher Turbo Boost frequency (5.2 GHz vs 4.6 GHz)
Advantages of AMD Ryzen 9 3900X
  • Has 34 MB larger L3 cache size

Benchmarks

Comparing the performance of CPUs in benchmarks
Cinebench R23 (Single-Core)
2006
Cinebench R23 (Multi-Core)
27409
Passmark CPU (Single-Core)
4235
Passmark CPU (Multi-Core)
41524
Geekbench 5 (Single-Core)
1993
Geekbench 5 (Multi-Core)
17253

Specifications

Full technical specification of core i9 12900k and ryzen 9 3900x

General

Intel Core i9 12900K AMD Ryzen 9 3900X
Vendor Intel AMD
Released November 5 2021 July 7 2019
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Alder Lake-S Matisse
Socket FCLGA1700 AM4
Integrated GPU Intel UHD Graphics 770 -

Performance

Intel Core i9 12900K AMD Ryzen 9 3900X
Cores 16 12
Threads 24 24
Base Frequency 3.2 GHz 3.8 GHz
Turbo Boost Frequency 5.2 GHz 4.6 GHz
L1 Cache 80K (per core) 96K (per core)
L2 Cache 1.25 MB (per core) 512K (per core)
L3 Cache 30 MB (shared) 64 MB
Unlocked Multiplier Yes Yes

Power

Intel Core i9 12900K AMD Ryzen 9 3900X
Fabrication process Intel 7 nm 7 nm
Power consumption (TDP) 125 W 125 W
Max. temperature 100°C 95°C

Memory support

Intel Core i9 12900K AMD Ryzen 9 3900X
Memory types DDR5, DDR4 DDR4 Dual-channel
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 76.8 GB/s 51.196 GB/s
ECC Support Yes No

iGPU

Intel Core i9 12900K AMD Ryzen 9 3900X
Integrated Graphics Intel UHD Graphics 770 -
GPU Base Clock 300 MHz MHz
GPU Boost Clock 1.55 MHz MHz
Shading Units 256
TMUs 16
ROPs 8
Execution Units 32
TGP 15 W W
iGPU FLOPS
0.78 TFLOPS
TFLOPS

Misc

Intel Core i9 12900K AMD Ryzen 9 3900X
Official site Intel Core i9 12900K official page AMD Ryzen 9 3900X official page
PCI Express Version
PCI Express Lanes 20

Comments

So which CPU will you choose: AMD Ryzen 9 3900X or Intel Core i9 12900K?