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AMD Ryzen 9 3900X vs Ryzen 7 3700X

We compared two desktop CPUs: the 3.8 GHz AMD Ryzen 9 3900X with 12-cores against the 3.6 GHz Ryzen 7 3700X 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 3700X and 3900X
Advantages of AMD Ryzen 9 3900X
  • Has 32 MB larger L3 cache size
  • Has 4 more physical cores
  • 5% higher Turbo Boost frequency (4.6 GHz vs 4.4 GHz)
Advantages of AMD Ryzen 7 3700X
  • Consumes up to 38% less energy than the Ryzen 9 3900X – 65 vs 105 Watt


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 AMD Ryzen 9 3900X and Ryzen 7 3700X


Vendor AMD AMD
Released July 7, 2019 July 7, 2019
Launch price 499 USD 329 USD
Type Desktop Desktop
Codename Zen 2 Zen 2
Socket AM4 AM4
Integrated GPU No No


Cores 12 8
Threads 24 16
Base Frequency 3.8 GHz 3.6 GHz
Turbo Boost Frequency 4.6 GHz 4.4 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 38x 36x
L1 Cache 64K (per core) 64K (per core)
L2 Cache 512K (per core) 512K (per core)
L3 Cache 64MB (shared) 32MB (shared)
Unlocked Multiplier Yes Yes


Transistors 19.2 billions 19.2 billions
Fabrication process 7 nm 7 nm
TDP 105 W 65 W
Max. temperature 95°C 95°C

Memory support

Memory types DDR4-3200 DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 47.68 GB/s 47.68 GB/s
ECC Support Yes Yes


Official site AMD Ryzen 9 3900X official page AMD Ryzen 7 3700X official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
43 (65.2%)
23 (34.8%)
Total votes: 66


So which CPU will you choose: AMD Ryzen 7 3700X or Ryzen 9 3900X?