Intel Core i7 8700K vs i5 12400F

We compared two 6-core desktop CPUs: the 3.7 GHz Intel Core i7 8700K against the 2.5 GHz i5 12400F. 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 12400F and 8700K
Advantages of Intel Core i7 8700K
  • Unlocked multiplier
  • Includes an integrated GPU Intel UHD Graphics 630
  • 7% higher Turbo Boost frequency (4.7 GHz vs 4.4 GHz)
Advantages of Intel Core i5 12400F
  • Newer - released 4-years and 3-months later
  • Around 35.2 GB/s (85%) higher theoretical memory bandwidth
  • Newer PCI Express version – 5.0
  • Consumes up to 32% less energy than the Core i7 8700K – 65 vs 95 Watt
  • Has 6 MB larger L3 cache size
  • More modern manufacturing process – 10 versus 14 nanometers
  • 32% faster in a single-core Geekbench v5 test - 1638 vs 1242 points


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 i7 8700K and i5 12400F


Vendor Intel Intel
Released October 5, 2017 January 4, 2022
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Coffee Lake Alder Lake-S
Model number i7-8700K i5-12400F
Socket LGA-1151 LGA-1700
Integrated GPU UHD Graphics 630 No


Cores 6 6
Threads 12 12
Base Frequency 3.7 GHz 2.5 GHz
Turbo Boost Frequency 4.7 GHz 4.4 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 37x 25x
Bus Bandwidth 8 GT/s -
L1 Cache 64K (per core) 80K (per core)
L2 Cache 256K (per core) 1280K (per core)
L3 Cache 12MB (shared) 18MB (shared)
Unlocked Multiplier Yes No


Fabrication process 14 nm 10 nm
TDP 95 W 65 W
Max. temperature 100°C 100°C


Integrated Graphics Intel UHD Graphics 630 -
GPU Base Clock 350 MHz -
GPU Boost Clock 1200 MHz -
Shading Units 192 -
TMUs 24 -
ROPs 3 -
Execution Units 24 -
TGP 15 W -
Max. Resolution 4096x2304 - 60 Hz -

Memory support

Memory types DDR4-2666 DDR5-4800, DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 41.6 GB/s 76.8 GB/s
ECC Support No No


Official site Intel Core i7 8700K official page Intel Core i5 12400F official page
PCI Express Version 3.0 5.0
PCI Express Lanes 16 20
Extended instructions SSE4.1, SSE4.2, AVX-2 -

Cast your vote

Choose between two processors
10 (21.7%)
36 (78.3%)
Total votes: 46


So which CPU will you choose: Intel Core i5 12400F or i7 8700K?