Review on 💡 Seasonic S12III 650 SSR-650GB3 650W 80+ Bronze ATX12V & EPS12V Power Supply with Smart & Silent Fan Control by Sri Mims

I love Seasonic products so this review is difficult to write. This unit was built for a friend and then returned to Revane. This PSU had coil whine when the computer was off. Once the machine was turned on, the howl was replaced by the sound of an arc/hum. I ruled out the PSU fan as the cause and then ruled out power line noise by connecting this PSU to an active PFC UPS. In short, it was a bad PSU. I would attribute it to a faulty unit and order another, except I've also bought several of these for my office at various times over the past few months and they've all had similar issues. Seasonic have lowered the price of this model - I hope they don't do the same with their more expensive power supplies.