Intel Core i9 12900K vs i9 12900HK

We compared two CPUs: the 3.2 GHz Intel Core i9 12900K (desktop) with 16-cores against the 2.5 GHz i9 12900HK (laptop) with 14-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 12900HK and 12900K
Advantages of Intel Core i9 12900K
  • Supports up to 128 GB DDR5-4800 RAM
  • Has 6 MB larger L3 cache size
  • Newer PCI Express version – 5.0
  • 19% faster in a single-core Geekbench v5 test - 1982 vs 1665 points
  • Has 2 more physical cores
  • 4% higher Turbo Boost frequency (5.2 GHz vs 5 GHz)
Advantages of Intel Core i9 12900HK
  • Consumes up to 64% less energy than the Core i9 12900K – 45 vs 125 Watt


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 i9 12900HK


Vendor Intel Intel
Released October 27, 2021 January 4, 2022
Type Desktop Laptop
instruction set x86-64 x86-64
Codename Alder Lake-S Alder Lake-H
Model number i9-12900K i9-12900HK
Socket LGA-1700 BGA-1744
Integrated GPU UHD Graphics 770 Iris Xe Graphics (96EU)


Cores 16 14
Threads 24 20
Base Frequency 3.2 GHz 2.5 GHz
Turbo Boost Frequency 5.2 GHz 5 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) 24MB (shared)
Unlocked Multiplier Yes Yes


Fabrication process 10 nm 10 nm
TDP 125 W 35-45 W
Max. temperature 100°C 100°C


Integrated Graphics Intel UHD Graphics 770 Intel Iris Xe Graphics (96EU)
GPU Base Clock 300 MHz 300 MHz
GPU Boost Clock 1550 MHz 1450 MHz
Shading Units 256 768
TMUs 16 48
ROPs 8 24
Execution Units 32 96
TGP 15 W 15 W

Memory support

Memory types DDR5-4800, DDR4-3200 DDR5-4800, DDR4-3200, LPDDR5-5200, LPDDR4x-4267
Memory Size 128 GB 64 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 76.8 GB/s -
ECC Support Yes No


Official site Intel Core i9 12900K official page Intel Core i9 12900HK official page
PCI Express Version 5.0 4.0
PCI Express Lanes 20 28

Cast your vote

Choose between two processors
38 (50.7%)
37 (49.3%)
Total votes: 75


So which CPU will you choose: Intel Core i9 12900HK or i9 12900K?