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Intel Core i9 11900F vs AMD Ryzen 9 3900X

We compared two desktop CPUs: the 2.5 GHz Intel Core i9 11900F with 8-cores against the 3.8 GHz AMD Ryzen 9 3900X with 12-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 3900X and 11900F
Advantages of Intel Core i9 11900F
  • Newer - released 1-year and 9-months later
  • Consumes up to 38% less energy than the Ryzen 9 3900X – 65 vs 105 Watt
  • 33% faster in a single-core Geekbench v5 test - 1737 vs 1305 points
  • 13% higher Turbo Boost frequency (5.2 GHz vs 4.6 GHz)
  • Around 2.32 GB/s (5%) higher theoretical memory bandwidth
Advantages of AMD Ryzen 9 3900X
  • Has 48 MB larger L3 cache size
  • More modern manufacturing process – 7 versus 14 nanometers
  • Unlocked multiplier
  • Has 4 more physical cores


Comparing the performance of CPUs in benchmarks
Cinebench R20 (Single-Core)
Cinebench R20 (Multi-Core)
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)


Full technical specification of Intel Core i9 11900F and AMD Ryzen 9 3900X


Vendor Intel AMD
Released March 16, 2021 July 7, 2019
Launch price 422 USD 499 USD
Type Desktop Desktop
Codename Rocket Lake Zen 2
Model number i9-11900F -
Socket BGA-1200 AM4
Integrated GPU No No


Cores 8 12
Threads 16 24
Base Frequency 2.5 GHz 3.8 GHz
Turbo Boost Frequency 5.2 GHz 4.6 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 25x 38x
Bus Bandwidth 8 GT/s -
L1 Cache 64K (per core) 64K (per core)
L2 Cache 512K (per core) 512K (per core)
L3 Cache 16MB (shared) 64MB (shared)
Unlocked Multiplier No Yes


Transistors - 19.2 billions
Fabrication process 14 nm 7 nm
TDP 65 W 105 W
Max. temperature 100°C 95°C

Memory support

Memory types DDR4-3200 DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 50 GB/s 47.68 GB/s
ECC Support No Yes


Official site Intel Core i9 11900F official page AMD Ryzen 9 3900X official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
1 (25%)
3 (75%)
Total votes: 4


So which CPU will you choose: AMD Ryzen 9 3900X or Intel Core i9 11900F?