Better CPU? Ryzen 5 5800x3d or Ryzen 5 7600x3d

It's time to upgrade my girlfriends PC and all she plays is Fortnite which is CPU based game mostly. Which CPU is better and get her more frames (1080p)

Either ddr4 with the 5800x3d or ddr5 with 7600x3d

• ⁠New build or upgrade? - Upgrade • ⁠Existing parts/monitors to reuse? (List with models/links) - 1080p resolution • ⁠PC purpose? (Gaming, editing, etc. List apps/games) - gaming