Intel Core i9 12900K vs AMD Ryzen Threadripper 3990X

We compared two desktop CPUs: the 3.2 GHz Intel Core i9 12900K with 16-cores against the 2.9 GHz AMD Ryzen Threadripper 3990X with 64-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.


General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
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 3990X and 12900K
Advantages of Intel Core i9 12900K
  • Newer - released 1-year and 10-months later
  • Consumes up to 55% less energy than the Ryzen Threadripper 3990X – 125 vs 280 Watt
  • 55% faster in a single-core Geekbench v5 test - 1982 vs 1277 points
  • Newer PCI Express version – 5.0
  • 21% higher Turbo Boost frequency (5.2 GHz vs 4.3 GHz)
  • Includes an integrated GPU Intel UHD Graphics 770
Advantages of AMD Ryzen Threadripper 3990X
  • Has 98 MB larger L3 cache size
  • Has 48 more physical cores
  • Supports up to 256 GB DDR4-3200 RAM
  • Supports quad-channel memory
  • More modern manufacturing process – 7 versus 10 nanometers
  • Around 18.57 GB/s (24%) higher theoretical memory bandwidth


Comparing the performance of CPUs in benchmarks
Cinebench R23 (Single-Core)
Cinebench R23 (Multi-Core)
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
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Full technical specification of Intel Core i9 12900K and AMD Ryzen Threadripper 3990X


Vendor Intel AMD
Released October 27, 2021 January 10, 2020
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Alder Lake-S Zen 2
Model number i9-12900K -
Socket LGA-1700 sTRX4
Integrated GPU UHD Graphics 770 No


Cores 16 64
Threads 24 128
Base Frequency 3.2 GHz 2.9 GHz
Turbo Boost Frequency 5.2 GHz 4.3 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 32x 29x
L1 Cache 64K (per core) 96K (per core)
L2 Cache 14MB (shared) 512K (per core)
L3 Cache 30MB (shared) 128MB (shared)
Unlocked Multiplier Yes Yes


Transistors - 19.2 billions
Fabrication process 10 nm 7 nm
TDP 125 W 280 W
Max. temperature 100°C 95°C


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 -

Memory support

Memory types DDR5-4800, DDR4-3200 DDR4-3200
Memory Size 128 GB 256 GB
Max. Memory Channels 2 4
Max. Memory Bandwidth 76.8 GB/s 95.37 GB/s
ECC Support Yes Yes


Official site Intel Core i9 12900K official page AMD Ryzen Threadripper 3990X official page
PCI Express Version 5.0 4.0
PCI Express Lanes 20 64

Cast your vote

Choose between two processors
197 (48.6%)
208 (51.4%)
Total votes: 405


So which CPU will you choose: AMD Ryzen Threadripper 3990X or Intel Core i9 12900K?
BILL DUKE 06 April 2022 13:48
Threadripper 3990x is far more superior and the best consumer CPU ever made.
+32 Reply