80+ Platinum PSU with 30amps on 5v rail?

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FahdK

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Hi Folks,

Need your help. I am looking for an 80+ Platinum (or Gold) PSU with 30amps on the 5v rail.

The only one I have found is the Corsair AX1200i.

Which is overkill in all other aspects and a bit too pricey for the NAS box I am building. 500w total is more than sufficient for me but I need 30amps/170w on the 5v rail.

Any cheaper PSU options with 30amps on the 5v rail? I would prefer platinum efficiency as this will be running 24/7 but can settle for gold.

Thanks in advance!
 
Solution
kanewolf
OK, so lets assume you somehow get a 96 SSD array.

This article shows power usage -- http://www.anandtech.com/show/8747/samsung-ssd-850-evo-review/10

So an 850 EVO 1 TB uses 2.6W when writing. 96 of them would be 50+ amps. I do believe that the drives use 5VDC.

I believe I would use a dedicated 5VDC supply for the drives, independent of the PC power supply for the motherboard. Something like this -- http://www.jameco.com/z/RSP-750-5-Mean-Well-AC-to-DC-Switching-Enclosed-Power-Supply-with-PFC-Function-5-Volts-100-Amps-500-Watts_2172092.html
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kanewolf

kanewolf

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You MUST be doing something other that creating a NAS - arc welding perhaps :)
But if this is a NAS with a TON of disk drives that you are worried about spin up current or something, you really need to investigate staggered spin-up.
That is how large disk systems manage their power.
 
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FahdK

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Well, I was initially planning for 96 SSDs but looks like I'll have to limit myself here.

Not sure about spin up for ssds but they almost entirely draw from the 5v unless I'm mistaken.

 
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kanewolf

kanewolf

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May 29, 2013
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OK, so lets assume you somehow get a 96 SSD array.

This article shows power usage -- http://www.anandtech.com/show/8747/samsung-ssd-850-evo-review/10

So an 850 EVO 1 TB uses 2.6W when writing. 96 of them would be 50+ amps. I do believe that the drives use 5VDC.

I believe I would use a dedicated 5VDC supply for the drives, independent of the PC power supply for the motherboard. Something like this -- http://www.jameco.com/z/RSP-750-5-Mean-Well-AC-to-DC-Switching-Enclosed-Power-Supply-with-PFC-Function-5-Volts-100-Amps-500-Watts_2172092.html
 
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FahdK

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May 13, 2014
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Thanks for that alternate solution. While not ideal, it is an option for me to explore.
Based on that article, sounds like I should budget for about 1A/5W per drive to allow for some overhead?
 
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