Intel Core i9 9900X vs AMD Ryzen 9 3950X

We compared two desktop CPUs: the 3.5 GHz Intel Core i9 9900X with 10-cores against the 3.5 GHz AMD Ryzen 9 3950X with 16-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 3950X and 9900X
Advantages of Intel Core i9 9900X
  • Supports quad-channel memory
Advantages of AMD Ryzen 9 3950X
  • Has 44 MB larger L3 cache size
  • More modern manufacturing process – 7 versus 14 nanometers
  • Consumes up to 36% less energy than the Core i9 9900X – 105 vs 165 Watt
  • Has 6 more physical cores
  • Newer - released 1-year and 2-months later
  • Newer PCI Express version – 4.0
  • 7% higher Turbo Boost frequency (4.7 GHz vs 4.4 GHz)
  • 11% faster in a single-core Geekbench v5 test - 1291 vs 1168 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 i9 9900X and AMD Ryzen 9 3950X


Vendor Intel AMD
Released October 8, 2018 November 25, 2019
Type Desktop Desktop
instruction set x86-64 x86-64
Codename Skylake Zen 2
Model number i9-9900X -
Socket LGA-2066 AM4
Integrated GPU No No


Cores 10 16
Threads 20 32
Base Frequency 3.5 GHz 3.5 GHz
Turbo Boost Frequency 4.4 GHz 4.7 GHz
Bus frequency 100 MHz 100 MHz
Multiplier 35x 35x
Bus Bandwidth 8 GT/s -
L1 Cache 64K (per core) 64K (per core)
L2 Cache 1MB (per core) 512K (per core)
L3 Cache 20MB (shared) 64MB (shared)
Unlocked Multiplier Yes Yes


Transistors - 3.8 billions
Fabrication process 14 nm 7 nm
TDP 165 W 105 W
Max. temperature 92°C -

Memory support

Memory types DDR4-2666 DDR4-3200
Memory Size 128 GB 128 GB
Max. Memory Channels 4 2
Max. Memory Bandwidth - 47.68 GB/s
ECC Support No Yes


Official site Intel Core i9 9900X official page AMD Ryzen 9 3950X official page
PCI Express Version 3.0 4.0
PCI Express Lanes 44 16
Extended instructions SSE4.1, SSE4.2, AVX-2, AVX-512 -

Cast your vote

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Total votes: 2


So which CPU will you choose: AMD Ryzen 9 3950X or Intel Core i9 9900X?