spiritamokk

Hi everyone, I'm seeking some advice on a power issue I'm facing with my Unraid build, particularly involving my Seasonic Prime PX-750, a 750W 80+ Platinum PSU. Background: A few months ago, I built my Unraid system with 10 x 18TB Seagate EXOS drives, and everything was running smoothly. Recently, I decided to expand my storage by adding 5 more drives, bringing the total to 15 HDDs. For power distribution, I'm using a dedicated peripheral power connector on the PSU for each set of 5 drives, connected via StarTech SATA Power Splitter Adapter Cables. Issue: As soon as I connected the 5 new drives, the PSU made a single click sound, and the system failed to boot. After disconnecting and reconnecting the PSU power cable, the same issue occurred. However, when I removed the 5 new drives, the system booted successfully with the original 10 HDDs. Attempting to boot with 11 drives resulted in the same failure. Funny enough If I connect 6 drives on the same power cable, system boots, but it does not feel safe to daisy chain this many drives on the the peripheral SATA connector. I've researched this PSU before buying and it was recommended for Unraid builds by many users, so I assume that it would be able to handle 15 drives. Is there something I'm missing here? Could the PSU be faulty? I still have the option to return it to Amazon. System Specifications: CPU: Intel i7 8700K Motherboard: Asus Maximus X RAM: 16GB DDR4 (2x8GB) HBA: LSI 9300-16i SSD: Samsung 980 Pro 1TB HDDs: 10 x 18TB Seagate EXOS (trying to add 5 more) PSU: Seasonic Prime PX-750, 750W 80+ Platinum Case: Rosewill RSV-L4500U I'd really appreciate any insights or advice on this matter. Thank you in advance!