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Question Is the Be Quiet System Power 9 500W a reliable PSU?

It's alright, tests (site is in german) rather well with decent 12v load regulation and manageable ripple. If the system you plan to power it with doesn't use more then 350w, and you aren't using rtx gpu's or i9/r9 cpu's, it'll be fine.

It's a double forward, dc to dc topology, comparable to the corsair cx-m.