AMD Ryzen 9 5900X vs Ryzen 9 3900XT

We compared two 12-core desktop CPUs: the 3.7 GHz AMD Ryzen 9 5900X against the 3.8 GHz Ryzen 9 3900XT. 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 3900XT and 5900X
Advantages of AMD Ryzen 9 5900X
  • 25% faster in a single-core Geekbench v5 test - 1644 vs 1317 points
  • 2% higher Turbo Boost frequency (4.8 GHz vs 4.7 GHz)


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 AMD Ryzen 9 5900X and Ryzen 9 3900XT


Vendor AMD AMD
Released October 8, 2020 July 7, 2020
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Vermeer Zen 2
Socket AM4 AM4
Integrated GPU No No


Cores 12 12
Threads 24 24
Base Frequency 3.7 GHz 3.8 GHz
Turbo Boost Frequency 4.8 GHz 4.7 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 37x 38x
L1 Cache 64K (per core) 64K (per core)
L2 Cache 512K (per core) 512K (per core)
L3 Cache 64MB (shared) 64MB (shared)
Unlocked Multiplier Yes Yes


Transistors - 3.8 billions
Fabrication process 7 nm 7 nm
TDP 105 W 105 W
Max. temperature 90°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 5900X official page AMD Ryzen 9 3900XT official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 24

Cast your vote

Choose between two processors
89 (44.3%)
112 (55.7%)
Total votes: 201


So which CPU will you choose: AMD Ryzen 9 3900XT or Ryzen 9 5900X?