February 4, 201214 yr I have this power supply laying around from an old PC. Enermax Infinity 720 Watt. Will this one do for a 10 drive built? It doesn't have a single 12V rail. See attached picture.
February 4, 201214 yr For 10 drives assuming they are all green (maybe a 7200RPM or two mixed in) should be fine.
February 4, 201214 yr Author For 10 drives assuming they are all green (maybe a 7200RPM or two mixed in) should be fine. Thank prostuff1. I that 3-4 drives per rail (12V1, 12V2, 12V3)? I have 3 cables holding 3 4pin molexes each and 3 cables holding 3 SATA-power plugs each. I have the Zalman 3 drive cages.
February 4, 201214 yr For 10 drives assuming they are all green (maybe a 7200RPM or two mixed in) should be fine. Thank prostuff1. I that 3-4 drives per rail (12V1, 12V2, 12V3)? I have 3 cables holding 3 4pin molexes each and 3 cables holding 3 SATA-power plugs each. I have the Zalman 3 drive cages. I've never seen a power supply where the three rails supply molex connectors for disks Typically, only ONE rail feeds all the molex connectors, AND that same rail also supplies the 24 pin connector on the MB. The other two rails are usually dedicated to the CPU power connectors and power hungry PCIe Video card connectors, which do not have the required 5volts to re-purpose for disks, even if you do not have one of the PCIe video cards that are in need of external power. Usually, a multiple rail supply is a bad choice if you are going to have more than about 5 drives in an array.
February 4, 201214 yr Author For 10 drives assuming they are all green (maybe a 7200RPM or two mixed in) should be fine. Thank prostuff1. I that 3-4 drives per rail (12V1, 12V2, 12V3)? I have 3 cables holding 3 4pin molexes each and 3 cables holding 3 SATA-power plugs each. I have the Zalman 3 drive cages. I've never seen a power supply where the three rails supply molex connectors for disks Typically, only ONE rail feeds all the molex connectors, AND that same rail also supplies the 24 pin connector on the MB. The other two rails are usually dedicated to the CPU power connectors and power hungry PCIe Video card connectors, which do not have the required 5volts to re-purpose for disks, even if you do not have one of the PCIe video cards that are in need of external power. Usually, a multiple rail supply is a bad choice if you are going to have more than about 5 drives in an array. Joe you are right, I forgot about the 5V. But looking at this picture I can use 2 rails for drives:
February 4, 201214 yr For comparison, I have a 620 Watt Corsair and I have 17 drives on it. 10 5400 WD greens and the rest are 7200 Seagates. Plus I have 3 controllers, 8GB of ram and 2.4gb core 2 duo along with an assortment of fans. My PSU is a dual rail version also. I think you will be alright for 10 drives. The PSU seems to be designed for 12 Peripherals. Going past that you will need to balance the amperage among the rails.
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