AMD Ryzen 9 3900X vs AMD Ryzen 7 5800X

Compare AMD Ryzen 9 Desktop 12 core CPU vs AMD Ryzen 7 Desktop 8 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
$ 255.93
$ 277.56 significantly less expensive

Benchmark Score

Overall Score

A combined score of all workloads

83 %
9% slightly better overall score
76 %

Gaming Score

The raw gaming performance with a fast GPU

83 %
91 %
9% slightly better gaming score

Multitasking Score

Performance in workloads using up to 8 cores

82 %
15% slightly better multitasking score
71 %

Heavy Workload Score

Performance in workloads using up to 16 cores

82 %
18% slightly better heavy workload score
69 %

Free CPU Benchmark

Want to compare your processor against the Ryzen 9 3900X and the Ryzen 7 5800X? Download our free and quick PC Performance Test.

Other Benchmarks

Geekbench (multi) score

Geekbench (multi) score

Multi threaded benchmark

13% slightly higher Geekbench (multi) score
Geekbench (single) score

Geekbench (single) score

Single threaded benchmark

30% slightly higher Geekbench (single) score
Cinebench R23 score

Cinebench R23 score

Multi threaded benchmark

20% slightly higher Cinebench R23 score
3DMark Physics score

3DMark Physics score

Physics simulation benchmark

4% slightly higher 3DMark Physics score



Number of physical processing units

49% significantly more cores


Number of logical processing units

49% significantly more threads

Clock Speed

Base frequency at which the chip operates

3.80 GHz
0.03% slightly higher clock speed
3.8 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
49% significantly more L1 cache
512 KiB

L2 Cache

Secondary embedded memory, slower than L1 cache

6 MiB
49% significantly more L2 cache
4 MiB

L3 Cache

General memory pool for all cores

64 MiB
100% significantly more L3 cache
32 MiB

Other details


Ranking in the hardwareDB database

41st of 1,219
56th of 1,219


The product line

Ryzen 9 Desktop
Ryzen 7 Desktop

Release date

The official date of release of this chip

July 2019
May 2020

Memory Type

The type of memory used by this chip


Is Unlocked

Can this CPU can be overclocked


Supports ECC memory

Does this CPU support error correcting memory


Ryzen 9 3900X vs Ryzen 7 5800X specs and performance

According to the hardwareDB Benchmark tool, the Ryzen 9 3900X is faster than the Ryzen 7 5800X. Despite this, the Ryzen 7 5800X has the advantage in our gaming benchmark.

When comparing core counts for these CPUs, we notice that the Ryzen 9 3900X has significantly more cores with 12 cores compared to the Ryzen 7 5800X that has 8 cores. It also has more threads than the Ryzen 7 5800X. Our comparison shows that the Ryzen 9 3900X has a slightly higher clock speed compared to the Ryzen 7 5800X. Despite this, the Ryzen 7 5800X 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. The cache sizes of these CPUs are different. Indeed, the Ryzen 9 3900X has significantly more L2 cache than the Ryzen 7 5800X. The Ryzen 9 3900X also has significantly more L3 cache.

Modern CPUs generally have more logical cores than physical cores, this means that each core is split into multiple virtual cores, improving efficiency for parallel workloads. Indeed, the Ryzen 9 3900X has more threads than cores. Each physical core is split into multiple threads.


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