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 only leverages one or two threads and the workload doesn't cause any of the processors to boost to their maximum frequencies, so the many-core chips aren't really taxed here. The Threadripper 3990X ends up in the middle of the pack, performing right on par with the Ryzen 9 3900X.
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| X265 Benchmark |
| Video Encoding Test |
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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.
The x265 video encoding benchmark doesn't scale past 64 threads either, unfortunately. As such, half of AMD's Ryzen Threadripper 3990X resources are left idle. It still manages to take the pole position and outpace the Threadripper 3970X, but its lead isn't as big as it would have been, had this benchmark scaled properly.
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| Y-Cruncher |
| MT Pi Calculator |
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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.
The Y-Cruncher benchmark also didn't scale past 64 threads either. In this benchmark, however, the Threadripper 3990X's lower clocks relative to the 3960X and 3970X, have it finishing just behind its little brothers.
