AMD Ryzen 9 3900X And Ryzen 7 3700X Review: Zen 2 Impresses

Ryzen 9 3900X And Ryzen 7 3700X: Speedometer, LAME MT, x265, Y-Cruncher

Next up, we have some numbers from the Speedometer 2.0 test available at The Speedometer Benchmark Suite uses a wide array of latency and throughput benchmarks to evaluate web application performance, and all of the results are tabulated into a final score. The benchmark measures performance of an array of browser-based technologies used on modern, rich web applications. Scores in this benchmark are an indicator of the performance users would see when browsing and running advanced web apps.

Speedometer 2.0
Web App Performance Testing

All of the systems were tested using the latest version of Microsoft's Edge browser, with default browser settings, on a clean install of Windows 10 Professional x64.


Once again, the Ryzen 9 3900X and Ryzen 7 3700X were able to outrun all of the other processors we tested. The two processors essentially finished in a dead heat, a few percentage points ahead of the Core i9-9900K.

Audio Conversion and Encoding
In our custom LAME MT MP3 encoding test, we convert a large WAV file to the MP3 format, which is a popular, day-to-day use case for many end users, to provide portability and storage of their digital audio content. LAME is an open-source mid to high bit-rate and VBR (variable bit rate) MP3 audio encoder that is used widely around the world in a multitude of third party applications.

In this test, we created our own 223MB WAV file and converted it to the MP3 format using the multi-thread capable LAME MT application in single and multi-thread modes. Processing times are recorded below, listed in seconds. Shorter times equate to better performance.


This benchmark uses only one or two threads and has traditionally favored Intel's architectures. The Ryzen 9 3900X and Ryzen 7 3700X showed a marked improvement over previous-gen AMD processors, and nearly caught the Intel CPUs in the multi-threaded test, but the single-threaded results trailed Intel overall.

X265 Benchmark
Video Encoding Test

The multi-threaded HWBOT x265 Benchmark is based on the open source x265 encoder that leverages modern CPU instructions to speed video encoding. We tested the CPUs represented here with the 64-bit encoder using the default 1080p workload.


Although it is clocked higher, the 8-core Core i9-9900K just barely edged out the much more affordable 8-core Ryzen 7 3700X. The 12-core Ryzen 9 3900X, however, kicked some serious butt here and blew past the 16-core Threadripper 2950X. Only the ultra-expensive, 18-core Core i9-9980XE was faster.

MT Pi Calculator
Y-Cruncher is a multi-core-capable tool that calculates the value of pi to a specified number of digits. In this case, we ran the tool on all threads and had the application calculate the value of pi to 1 billion digits. The values below are the time required to perform the calculation expressed in seconds. As a result, lower values indicate better performance.
y cruncher
The Ryzen 9 3900X and Ryzen 7 3700X both performed well in this benchmark. The 12-core 3900X nearly caught the 16-core Threadripper 2950X and the 8-core Ryzen 7 3700X smashed the Core i9-9900K.

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