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Intel Core i7 9700K vs AMD Ryzen 9 3900X

We compared two desktop CPUs: the 3.6 GHz Intel Core i7 9700K with 8-cores against the 3.8 GHz AMD Ryzen 9 3900X with 12-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.

NanoReview Review

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 Consumption
The efficiency score of electricity consumption
NanoReview Final Score
Generic CPU rating

Key Differences

What are the key differences between 3900X and 9700K
Advantages of Intel Core i7 9700K
  • Includes an integrated GPU Intel UHD Graphics 630
  • Consumes up to 10% less energy than the Ryzen 9 3900X – 95 vs 105 Watt
  • 7% higher Turbo Boost frequency (4.9 GHz vs 4.6 GHz)
Advantages of AMD Ryzen 9 3900X
  • Has 52 MB larger L3 cache size
  • More modern manufacturing process – 7 versus 14 nanometers
  • Newer - released 9 months later
  • Has 4 physical cores more than the 9700K
  • Newer PCI Express version – 4.0
  • Around 6.08 GB/s (15%) higher theoretical memory bandwidth


Comparing the performance of CPUs in benchmarks
Cinebench R20 (Single-Core)
Cinebench R20 (Multi-Core)
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)


Full technical specification of Intel Core i7 9700K and AMD Ryzen 9 3900X


Vendor Intel AMD
Released October 8, 2018 July 7, 2019
Launch price 385 USD 499 USD
Type Desktop Desktop
Codename Coffee Lake Zen 2
Model number i7-9700K -
Socket LGA-1151 AM4
Integrated GPU Intel UHD Graphics 630 No


Cores 8 12
Threads 8 24
Base Frequency 3.6 GHz 3.8 GHz
Turbo Boost Frequency 4.9 GHz 4.6 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 36x 38x
Bus Bandwidth 8 GT/s -
L1 Cache 64K (per core) 64K (per core)
L2 Cache 256K (per core) 512K (per core)
L3 Cache 12MB (shared) 64MB (shared)
Unlocked Multiplier Yes Yes


Transistors - 19.2 billions
Fabrication Process 14 nm 7 nm
TDP 95 W 105 W
Max. temperature 100°C 95°C

Memory support

Memory types DDR4-2666 DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 41.6 GB/s 47.68 GB/s
ECC Support No Yes


Official site Intel Core i7 9700K official page AMD Ryzen 9 3900X official page
PCI Express Version 3.0 4.0
PCI Express Lanes 16 20
Instruction Set SSE4.1, SSE4.2, AVX-2 -

Cast your vote

Choose between two processors
1 (20%)
4 (80%)
Total votes: 5


So which CPU will you choose: AMD Ryzen 9 3900X or Intel Core i7 9700K?