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The parts linked on the post are performing well. If you size them well, the main issue you can run into is inrush current when powering up. You may need a soft start circuit. I know I'm at the limit and may need to add a soft start if I add more fans.

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Thanks for the feedback! A triggered power-on seauence for drives and fans makes sense, though I feel like this could also be solved by putting a couple of large capacitors on the 12V power rail (those need to charge as well, obviously, which might be an issue on startup).

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