It is a digital edition, I can’t try PS4 games. I tested a different power supply, no change.Does it happen less, or not at all, with PS4 games? Have you tried another PSU?
In my case, I don't think the Southbridge is the culprit. PS4 games work fine, but PS5 games don't — that's the thing. I've read that the APU runs at lower clocks for PS4 games, while PS5 games push it to higher frequencies by default. Most similar cases I've seen point to a degraded APU power delivery system, always throwing the 808B00FF error. If the power delivery checks out, maybe the APU itself is on its way out? Thing is, I'm not getting any other codes — just 808B00FF and 80830018, both at the same time.By any chance, did you replace the southbridge? Or was it replaced earlier?