AMD Ryzen 9 3900X vs AMD Ryzen 9 3950X

Compare AMD Ryzen 9 Desktop 12 core CPU vs AMD Ryzen 9 Desktop 16 core processor, specs and benchmark score. Which is the better CPU for gaming?

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The cheapest price from our partner retailers

$ 533.49
$ 236.50 significantly less expensive
$ 769.99

Benchmark Score

Overall Score

A combined score of all workloads

83 %
97 %
16% slightly better overall score

Gaming Score

The raw gaming performance with a fast GPU

83 %
84 %
1% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

82 %
101 %
23% slightly better multitasking score

Heavy Workload Score

Performance in workloads using up to 16 cores

82 %
103 %
25% slightly better heavy workload score

Free CPU Benchmark

Want to compare your processor against the Ryzen 9 3900X and the Ryzen 9 3950X? Download our free and quick PC Performance Test.

Other Benchmarks

Geekbench (multi) score

Geekbench (multi) score

Multi threaded benchmark

21% slightly higher Geekbench (multi) score
Geekbench (single) score

Geekbench (single) score

Single threaded benchmark

1% slightly higher Geekbench (single) score
3DMark Physics score

3DMark Physics score

Physics simulation benchmark

8% slightly higher 3DMark Physics score



Number of physical processing units

33% slightly more cores


Number of logical processing units

33% slightly more threads

Clock Speed

Base frequency at which the chip operates

3.80 GHz
8% slightly higher clock speed
3.5 GHz

Turbo Speed

Higher frequency used for heavy workloads

4.6 GHz
4.7 GHz
2% slightly higher turbo speed


Thermal Design Power: Measure of heat generated by the CPU

105 W
105 W

Memory Channels

Lanes for simultaneous memory access


L1 Cache

Smallest embedded memory, but the fastest

768 KiB
1024 KiB
33% slightly more L1 cache

L2 Cache

Secondary embedded memory, slower than L1 cache

6 MiB
8 MiB
33% slightly more L2 cache

L3 Cache

General memory pool for all cores

64 MiB
64 MiB

Other details


Ranking in the hardwareDB database

41st of 1,219
22nd of 1,219


The product line

Ryzen 9 Desktop
Ryzen 9 Desktop

Release date

The official date of release of this chip

July 2019
November 2019

Memory Type

The type of memory used by this chip


Is Unlocked

Can this CPU can be overclocked


Ryzen 9 3900X vs Ryzen 9 3950X benchmarks

In our benchmarks, the Ryzen 9 3950X beats the Ryzen 9 3900X in overall performance. Furthermore, our gaming benchmark shows that it also outperforms the Ryzen 9 3900X in all gaming tests too.

In terms of the number of cores of each of these CPUs, the Ryzen 9 3950X has slightly more cores than the Ryzen 9 3900X. Indeed, the Ryzen 9 3950X has 16 cores compared to 12 cores found in the Ryzen 9 3900X. It also has more threads than the Ryzen 9 3900X. Our comparison shows that the Ryzen 9 3900X has a slightly higher clock speed compared to the Ryzen 9 3950X. Despite this, the Ryzen 9 3950X has a slightly higher turbo speed. Both these chips have an identical TDP (Thermal Design Power). This measures the amount of heat they output and can be used to estimate power consumption. In terms of cache, the Ryzen 9 3950X has slightly more L2 cache when compared to the Ryzen 9 3900X. However, both these chips have the same amount of L3 cache.

Most CPUs have more threads than cores. This technology, colloquially called hyperthreading, improves performance by splitting a core into multiple virtual ones. This provides more efficient utilisation of a core. Indeed, the Ryzen 9 3900X has more threads than cores. Each physical core is split into multiple threads.


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