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MO-RA3: Difference between revisions
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Pairing 9x P-14s on the front with 9x NF-A14s on the back yields a maximum 54W of 12V power draw, exactly 4.5A. Coincidentally, this is the exact amount of 12V power provided by the 3 1.5A 12V pins of a SATA power connector. | Pairing 9x P-14s on the front with 9x NF-A14s on the back yields a maximum 54W of 12V power draw, exactly 4.5A. Coincidentally, this is the exact amount of 12V power provided by the 3 1.5A 12V pins of a SATA power connector. | ||
It would be possible to locally provide power via a 12V AC adapter. 12V/5A adapters can be easily acquired, and would be sufficient to deliver the necessary 54W (5A at 12V is 60W). But such an adapter is likely to be significantly less efficient than a high-grade PSU. In my [[Schwarzgerät_III|workstation]], I've got an EVGA Supernova T2 Titanium power supply, which will be far more efficient than any dinky AC adapter. | It would be possible to locally provide power via a 12V AC adapter. 12V/5A adapters can be easily acquired, and would be sufficient to deliver the necessary 54W (5A at 12V is 60W). But such an adapter is likely to be significantly less efficient than a high-grade PSU. In my [[Schwarzgerät_III|workstation]], I've got an EVGA Supernova T2 Titanium power supply, which will be far more efficient than any dinky AC adapter. | ||
==Wiring== | |||
Desiring to source the most efficient power possible, I'll run a lengthy PCIe 6-pin cable out the back of my machine, capable of carrying at least 75W on its three 12V pins (6.24A). I'll then use a trivial adapter to take that to SATA or Molex, and thus be able to power nine PF-14s on the front, and nine NF-A14s on the back. I do not intend to put any pumps on the MO-RA3, as I already have three D5s in my workstation. My longest PCIe cables are 75cm long, with a 30cm PCIe-to-Molex adapter. | |||
