Intel Core i9 12900KF vs i9 11900KF

We compared two desktop CPUs: the 3.2 GHz Intel Core i9 12900KF with 16-cores against the 3.5 GHz i9 11900KF with 8-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 11900KF and 12900KF
Advantages of Intel Core i9 12900KF
  • Has 8 more physical cores
  • Has 14 MB larger L3 cache size
  • Newer - released 7-months later
  • Around 26.8 GB/s (54%) higher theoretical memory bandwidth
  • More modern manufacturing process – 10 versus 14 nanometers
  • Newer PCI Express version – 5.0
  • 11% faster in a single-core Geekbench v5 test - 1975 vs 1780 points
Advantages of Intel Core i9 11900KF
  • 2% higher Turbo Boost frequency (5.3 GHz vs 5.2 GHz)


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 12900KF and i9 11900KF


Vendor Intel Intel
Released October 27, 2021 March 16, 2021
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Alder Lake-S Rocket Lake
Model number i9-12900KF i9-11900KF
Socket LGA-1700 LGA-1200
Integrated GPU No No


Cores 16 8
Threads 24 16
Base Frequency 3.2 GHz 3.5 GHz
Turbo Boost Frequency 5.2 GHz 5.3 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 32x 35x
Bus Bandwidth - 8 GT/s
L1 Cache 64K (per core) 64K (per core)
L2 Cache 14MB (shared) 512K (per core)
L3 Cache 30MB (shared) 16MB (shared)
Unlocked Multiplier Yes Yes


Fabrication process 10 nm 14 nm
TDP 125 W 125 W
Max. temperature 100°C 100°C

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 50 GB/s
ECC Support Yes No


Official site Intel Core i9 12900KF official page Intel Core i9 11900KF official page
PCI Express Version 5.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
28 (77.8%)
8 (22.2%)
Total votes: 36


So which CPU will you choose: Intel Core i9 11900KF or i9 12900KF?