Intel Core i9 12900K vs AMD Ryzen 9 6900HX

We compared two CPUs: the 3.2 GHz Intel Core i9 12900K (desktop) with 16-cores against the 3.3 GHz AMD Ryzen 9 6900HX (laptop) 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 6900HX and 12900K
Advantages of Intel Core i9 12900K
  • Has 8 more physical cores
  • Supports up to 128 GB DDR5-4800 RAM
  • Has 14 MB larger L3 cache size
  • Newer PCI Express version – 5.0
  • 25% faster in a single-core Geekbench v5 test - 1982 vs 1589 points
  • 6% higher Turbo Boost frequency (5.2 GHz vs 4.9 GHz)
Advantages of AMD Ryzen 9 6900HX
  • Consumes up to 64% less energy than the Core i9 12900K – 45 vs 125 Watt
  • More modern manufacturing process – 6 versus 10 nanometers


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 AMD Ryzen 9 6900HX


Vendor Intel AMD
Released October 27, 2021 January 4, 2022
Type Desktop Laptop
instruction set x86-64 x86-64
Codename Alder Lake-S Rembrandt
Model number i9-12900K -
Socket LGA-1700 FP7
Integrated GPU UHD Graphics 770 Radeon 680M


Cores 16 8
Threads 24 16
Base Frequency 3.2 GHz 3.3 GHz
Turbo Boost Frequency 5.2 GHz 4.9 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 32x 33x
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 6 nm
TDP 125 W 45 W
Max. temperature 100°C 95°C


Integrated Graphics Intel UHD Graphics 770 AMD Radeon 680M
GPU Base Clock 300 MHz 2000 MHz
GPU Boost Clock 1550 MHz 2400 MHz
Shading Units 256 768
TMUs 16 48
ROPs 8 32
Execution Units 32 12
TGP 15 W 15 W
3.686 TFLOPS

Memory support

Memory types DDR5-4800, DDR4-3200 DDR5-4800, LPDDR5-6400
Memory Size 128 GB 64 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 12900K official page AMD Ryzen 9 6900HX official page
PCI Express Version 5.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
76 (49.4%)
78 (50.6%)
Total votes: 154


So which CPU will you choose: AMD Ryzen 9 6900HX or Intel Core i9 12900K?