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So, my little Unraid server just died and tripped the breaker. Any troubleshooting advice? What's the most efficient ATX PSU at ~30W?

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To make it short, looks like my cheap, but reasonably well reviewed, PSU just died. The server gently clicks once when I plug it in and draws 3W, but that's all it does. So I hope that the most likely culprit is the actual culprit here (any advice for further troubleshooting is welcome).

 

Normally, the server draws about ~30W in idle from the wall (with the old, not super-efficient, PSU), and has never exceeded 220W under full load.

 

It's an Intel i5-11400 on a Gigabyte B560M DS3H V2 with 32Gb RAM, an ASM 1166 SATA-extender card, 12 SATA drives and 2 M.2 SSDs. The enclosure is a Fractal Node 804 and I would prefer another ATX PSU as a drop-in replacement over fiddling with a Pico PSU.

 

The once highly recommended Corsairs RMx550 v2 is in short supply here in Germany and, naturally, energy prices are high.

 

What's the PSU with the best efficiency at around 30W, that also won't break the bank? Modular is a plus (for repairability) but not a must.

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