Windows 11 vs. Ubuntu 24.04 Linux Performance For The AMD Ryzen 9 9950X
With WebP image encoding there were generational improvements on both Windows 11 and Ubuntu Linux going from the Ryzen 9 7950X to 9950X. Ubuntu 24.04 LTS each time was faster than Windows 11. The Ryzen 9 7950X saw a larger boost switching to Linux from Windows 11 than the closer results on the Ryzen 9 9950X.
With the Kvazaar H.265 video encoder there was slightly better 7950X to 9950X uplift on Linux. Under Windows with the H.265 4K slow video encoding was a 5.9% improvement on Windows 11 but 8.4% under Ubuntu Linux.
With 4K content encoded at the medium preset with Kvazaar, Windows 11 with the Ryzen 9 9950X was 6% faster while Ubuntu was 8.3% faster with the Zen 5 desktop processor.
Kvazaar H.265 encoding consistently was seeing more uplift on Linux when going from the Ryzen 9 7950X to 9950X.
With 1080p video encoding content, the Ryzen 9 7950X to 9950X uplift was around 8% for Windows and 11% for Linux, but Windows 11 was overall faster at 1080p encoding than Ubuntu Linux.
While Linux was faster than Windows at 4K video encoding with Kvazaar, at 1080p encoding it flipped around and Windows 11 was faster. Presumably due to CPU frequency scaling driver/governor behavior differences between the two operating systems. With the video encoders I've seen a great deal of differing results if opting for non-default CPU frequency scaling governor / driver settings. But in any even at 1080p there continued to be greater uplift for the 7950X to 9950X on Linux by a few percent.
With 1080p ultra fast encoding, from the Ryzen 9 7950X to 9950X was a 4% difference on Windows 11 but with Ubuntu 24.04 LTS went up by 12%! Here Ubuntu Linux also returned to being faster than Windows 11 for this speedy 1080p encoding.