Ryzen 9 3900X vs Ryzen 7 3800X

Aggregate performance score

Ryzen 7 3800X
2019
8 cores / 16 threads, 105 Watt
14.57
Ryzen 9 3900X
2019
12 cores / 24 threads, 125 Watt
20.54
+41%

Ryzen 9 3900X outperforms Ryzen 7 3800X by a considerable 41% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 7 3800X and Ryzen 9 3900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking487269
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation15.8020.87
Market segmentDesktop processorDesktop processor
SeriesAMD Ryzen 7AMD Ryzen 9
Power efficiency13.1315.55
Architecture codenameMatisse (2019−2020)Matisse (Zen 2) (2019−2020)
Release date7 July 2019 (5 years ago)7 July 2019 (5 years ago)
Launch price (MSRP)$399$499

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 3900X has 32% better value for money than Ryzen 7 3800X.

Detailed specifications

Ryzen 7 3800X and Ryzen 9 3900X basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores8 (Octa-Core)12 (Dodeca-Core)
Threads1624
Base clock speed3.9 GHz3.8 GHz
Boost clock speed4.5 GHz4.6 GHz
L1 cache96K (per core)96K (per core)
L2 cache512K (per core)512K (per core)
L3 cache32 MB64 MB
Chip lithography7 nm, 12 nm7 nm, 12 nm
Maximum core temperatureno data95 °C
Number of transistors19,200 million19,200 million
64 bit support++
Windows 11 compatibility++
Unlocked multiplier++

Compatibility

Information on Ryzen 7 3800X and Ryzen 9 3900X compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration1 (Uniprocessor)1 (Uniprocessor)
SocketAM4AM4
Power consumption (TDP)105 Watt125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 7 3800X and Ryzen 9 3900X. You'll probably need this information if you require some particular technology.

AES-NI++
AVX++
Precision Boost 2++

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 7 3800X and Ryzen 9 3900X are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 7 3800X and Ryzen 9 3900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4 Dual-channelDDR4 Dual-channel
Maximum memory size128 GB128 GB
Max memory channels22
Maximum memory bandwidth51.196 GB/s51.196 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card--

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Ryzen 7 3800X 14.57
Ryzen 9 3900X 20.54
+41%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Ryzen 7 3800X 23140
Ryzen 9 3900X 32619
+41%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Ryzen 7 3800X 1701
Ryzen 9 3900X 1710
+0.5%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Ryzen 7 3800X 8224
Ryzen 9 3900X 9948
+21%

Gaming performance

Pros & cons summary


Performance score 14.57 20.54
Physical cores 8 12
Threads 16 24
Power consumption (TDP) 105 Watt 125 Watt

Ryzen 7 3800X has 19% lower power consumption.

Ryzen 9 3900X, on the other hand, has a 41% higher aggregate performance score, and 50% more physical cores and 50% more threads.

The Ryzen 9 3900X is our recommended choice as it beats the Ryzen 7 3800X in performance tests.


Should you still have questions on choice between Ryzen 7 3800X and Ryzen 9 3900X, ask them in Comments section, and we shall answer.

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AMD Ryzen 7 3800X
Ryzen 7 3800X
AMD Ryzen 9 3900X
Ryzen 9 3900X

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


4.5 1747 votes

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Questions & comments

Here you can ask a question about Ryzen 7 3800X or Ryzen 9 3900X, agree or disagree with our judgements, or report an error or mismatch.