Intel Core i9 11900K vs i5 12400

We compared two desktop CPUs: the 3.5 GHz Intel Core i9 11900K with 8-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.

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 12400 and 11900K
Advantages of Intel Core i9 11900K
  • Unlocked multiplier
  • Has 2 more physical cores
  • 20% higher Turbo Boost frequency (5.3 GHz vs 4.4 GHz)
  • 13% faster in a single-core Geekbench v5 test - 1830 vs 1623 points
Advantages of Intel Core i5 12400
  • Newer - released 10-months later
  • Consumes up to 48% less energy than the Core i9 11900K – 65 vs 125 Watt
  • Around 26.8 GB/s (54%) higher theoretical memory bandwidth
  • More modern manufacturing process – 10 versus 14 nanometers
  • Newer PCI Express version – 5.0
  • Has 2 MB larger L3 cache size

Benchmarks

Comparing the performance of CPUs in benchmarks
Cinebench R23 (Single-Core)
Cinebench R23 (Multi-Core)
15333
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
25610
Geekbench 5 (Single-Core)
1839
Geekbench 5 (Multi-Core)
11098
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Specifications

Full technical specification of Intel Core i9 11900K and i5 12400

General

Vendor Intel Intel
Released March 16, 2021 January 4, 2022
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Rocket Lake Alder Lake-S
Model number i9-11900K i5-12400
Socket LGA-1200 LGA-1700
Integrated GPU UHD Graphics 750 UHD Graphics 730

Performance

Cores 8 6
Threads 16 12
Base Frequency 3.5 GHz 2.5 GHz
Turbo Boost Frequency 5.3 GHz 4.4 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 35x 25x
Bus Bandwidth 8 GT/s -
L1 Cache 64K (per core) 80K (per core)
L2 Cache 512K (per core) 1280K (per core)
L3 Cache 16MB (shared) 18MB (shared)
Unlocked Multiplier Yes No

Power

Fabrication process 14 nm 10 nm
TDP 125 W 65 W
Max. temperature 100°C 100°C

iGPU

Integrated Graphics Intel UHD Graphics 750 Intel UHD Graphics 730
GPU Base Clock 300 MHz 300 MHz
GPU Boost Clock 1300 MHz 1450 MHz
Shading Units 256 192
TMUs 64 48
ROPs 32 24
Execution Units 32 24
TGP 15 W 15 W
Max. Resolution 3840x2160 - 60 Hz 3840x2160 - 60 Hz
iGPU FLOPS
0.46 TFLOPS
0.35 TFLOPS

Memory support

Memory types DDR4-3200 DDR5-4800, DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 50 GB/s 76.8 GB/s
ECC Support No No

Misc

Official site Intel Core i9 11900K official page Intel Core i5 12400 official page
PCI Express Version 4.0 5.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
13 (35.1%)
24 (64.9%)
Total votes: 37

Comments

So which CPU will you choose: Intel Core i5 12400 or i9 11900K?