I like to think about it this way -
If you're lucky enough to get a Ryzen chip that can run at 4 ghz, you can run just about everything in Dolphin, except maybe Rogue Squadron after Dynamic BATs landed. Because the G3258 pretty much can do that with no voltage bump.
At that point, it doesn't matter which Ryzen you get, 3/5/7, they all have the same core. They're just binned differently and that will change how lucky you are with how high you can get the clock speed. But I think even Ryzen 5 clocks at 3.7 ghz or something? More than enough for the majority of games people care about in Dolphin.
If you're lucky enough to get a Ryzen chip that can run at 4 ghz, you can run just about everything in Dolphin, except maybe Rogue Squadron after Dynamic BATs landed. Because the G3258 pretty much can do that with no voltage bump.
At that point, it doesn't matter which Ryzen you get, 3/5/7, they all have the same core. They're just binned differently and that will change how lucky you are with how high you can get the clock speed. But I think even Ryzen 5 clocks at 3.7 ghz or something? More than enough for the majority of games people care about in Dolphin.