entre 0 et 2% ,de mieux lol, ils ne servent à rien

https://videocardz.com/89478/amd-ryzen-3000xt-matisse-2-processors-review-roundup

un peu plus chez computerbase

Performance increase in the test course
Counterparties Apps (single core) Apps (multi-core) Games (FPS) Games (Frametimes)
3900XT vs. 3900X + 3% ± 0% + 3% + 4%
3800XT vs. 3800X + 4% +1% + 3% + 4%
3600XT vs. 3600X + 2% +1% + 3% + 6%

https://www.lesnumeriques.com/cpu-processeur/assassin-s-creed-valhalla-gratuit-avec-certains-ryzen-3000-et-ryzen-4000-n152213.html