Oh, this is interesting. Is it using a delidded 5800X3D? I'd love to see the behaviour of this thing thermally and, obviously, in games.
This could be a good preview of mobile parts of Zen4 with VCache. And while this is not confirmed or anything like that, it's a wish. Phoenix will bring the full Zen4 SoC to mobile, so that paves the way for VCache variants as well.