Intel Core i9 12900KF vs i5 12400

We compared two desktop CPUs: the 3.2 GHz Intel Core i9 12900KF with 16-cores against the 2.5 GHz i5 12400 with 6-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 12400 and 12900KF
Advantages of Intel Core i9 12900KF
  • Has 10 more physical cores
  • Unlocked multiplier
  • Has 12 MB larger L3 cache size
  • 18% higher Turbo Boost frequency (5.2 GHz vs 4.4 GHz)
  • 22% faster in a single-core Geekbench v5 test - 1975 vs 1623 points
Advantages of Intel Core i5 12400
  • Consumes up to 48% less energy than the Core i9 12900KF – 65 vs 125 Watt
  • Includes an integrated GPU Intel UHD Graphics 730


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 i5 12400


Vendor Intel Intel
Released October 27, 2021 January 4, 2022
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Alder Lake-S Alder Lake-S
Model number i9-12900KF i5-12400
Socket LGA-1700 LGA-1700
Integrated GPU No UHD Graphics 730


Cores 16 6
Threads 24 12
Base Frequency 3.2 GHz 2.5 GHz
Turbo Boost Frequency 5.2 GHz 4.4 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 32x 25x
L1 Cache 64K (per core) 80K (per core)
L2 Cache 14MB (shared) 1280K (per core)
L3 Cache 30MB (shared) 18MB (shared)
Unlocked Multiplier Yes No


Fabrication process 10 nm 10 nm
TDP 125 W 65 W
Max. temperature 100°C 100°C


Integrated Graphics - Intel UHD Graphics 730
GPU Base Clock - 300 MHz
GPU Boost Clock - 1450 MHz
Shading Units - 192
TMUs - 48
ROPs - 24
Execution Units - 24
TGP - 15 W
Max. Resolution - 3840x2160 - 60 Hz

Memory support

Memory types DDR5-4800, DDR4-3200 DDR5-4800, DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 76.8 GB/s 76.8 GB/s
ECC Support Yes No


Official site Intel Core i9 12900KF official page Intel Core i5 12400 official page
PCI Express Version 5.0 5.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
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Total votes: 2


So which CPU will you choose: Intel Core i5 12400 or i9 12900KF?