Intel Core i9 12900K vs AMD Ryzen 9 3950X

We compared two 16-core desktop CPUs: the 3.2 GHz Intel Core i9 12900K against the 3.5 GHz AMD Ryzen 9 3950X. On this page, you'll find out which processor has better performance in benchmarks, games 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
Power Efficiency
The efficiency score of electricity consumption
NanoReview Final Score
Generic CPU rating

Key Differences

What are the key differences between 3950X and 12900K
Advantages of Intel Core i9 12900K
  • Newer - released 2-years later
  • 71% faster in a single-core Geekbench v5 test - 2191 vs 1282 points
  • Around 29.12 GB/s (61%) higher theoretical memory bandwidth
  • Newer PCI Express version – 5.0
  • Includes an integrated GPU Intel UHD Graphics 770
  • 11% higher Turbo Boost frequency (5.2 GHz vs 4.7 GHz)
Advantages of AMD Ryzen 9 3950X
  • Has 34 MB larger L3 cache size
  • More modern manufacturing process – 7 versus 10 nanometers
  • Consumes up to 16% less energy than the Core i9 12900K – 105 vs 125 Watt

Benchmarks

Comparing the performance of CPUs in benchmarks
Cinebench R23 (Single-Core)
2005
Cinebench R23 (Multi-Core)
27512
Passmark CPU (Single-Core)
4220
Passmark CPU (Multi-Core)
41298
Geekbench 5 (Single-Core)
2194
Geekbench 5 (Multi-Core)
16939
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Specifications

Full technical specification of Intel Core i9 12900K and AMD Ryzen 9 3950X

General

Vendor Intel AMD
Released October 27, 2021 November 25, 2019
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Alder Lake-S Zen 2
Model number i9-12900K -
Socket LGA-1700 AM4
Integrated GPU UHD Graphics 770 No

Performance

Cores 16 16
Threads 24 32
Base Frequency 3.2 GHz 3.5 GHz
Turbo Boost Frequency 5.2 GHz 4.7 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 32x 35x
L1 Cache 64K (per core) 64K (per core)
L2 Cache 14MB (shared) 512K (per core)
L3 Cache 30MB (shared) 64MB (shared)
Unlocked Multiplier Yes Yes

Power

Transistors - 3.8 billions
Fabrication process 10 nm 7 nm
TDP 125 W 105 W
Max. temperature 100°C -

iGPU

Integrated Graphics Intel UHD Graphics 770 -
GPU Base Clock 300 MHz -
GPU Boost Clock 1550 MHz -
Shading Units 256 -
TMUs 16 -
ROPs 8 -
Execution Units 32 -
TGP 15 W -
iGPU FLOPS
0.78 TFLOPS

Memory support

Memory types DDR5-4800, DDR4-3200 DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 76.8 GB/s 47.68 GB/s
ECC Support Yes Yes

Misc

Official site Intel Core i9 12900K official page AMD Ryzen 9 3950X official page
PCI Express Version 5.0 4.0
PCI Express Lanes 20 16

Cast your vote

Choose between two processors
17 (58.6%)
12 (41.4%)
Total votes: 29

Comments

So which CPU will you choose: AMD Ryzen 9 3950X or Intel Core i9 12900K?
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