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Author Topic: Running Antminer S9 with 2 HP Server Power Supplies Safe @110v?  (Read 499 times)
redalert11
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November 14, 2017, 07:15:26 PM
 #1

Hi all,
Just wanted some feedback on running 2 900 watt HP server power supplies on an Antminer S9@110v.  I know Bitmain says it voids the warranty but in terms of safety and longevity is it safe or as safe as running the Bitmain PSU?  Your thoughts please.  

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fanatic26
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November 14, 2017, 07:24:56 PM
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No this will not be safe.

An s9 requires at least 450w per individual hashing board. This would completely max out one of the power supplies and most likely cause it to fail or shut off repeatedly from too much power draw. Also if you try to power a single board from two separate psus to balance the load you will kill the hash board.

Stop buying industrial miners, running them at home, and then complaining about the noise.
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November 14, 2017, 07:26:40 PM
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As has been repeated here time and again it is NEVER 'safe' to use multiple PSU's.
Can it be done? As long as you never ever try to power a single board with more than one supply ja it works but the risks of improper hookup (frying the miner or PSUs) plus the miner power now being questionable far outweigh being able to do it.

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redalert11
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November 14, 2017, 07:44:22 PM
 #4

What about atx Power Supplies? 

NotFuzzyWarm
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November 14, 2017, 08:05:46 PM
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What about atx Power Supplies?  
Overall ATX supplies - even 'server' ones - are CRAP when it comes to powering miners. They were never designed to run 24x7 at or near full load nor in the fairly high temp areas that are around miners..

Why do folks insist on spending $$$ for miners and then try to go cheap on PSU's? They are critical to how a miner performs. Browse eBay, Amazon etc and you will find many folks selling decently priced miner PSU's based on real HP and IBM server supplies along with the needed breakout boards that can each easily power a miner.

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redalert11
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November 14, 2017, 09:28:57 PM
 #6

Well that's what I was asking I have 2 HP DPS-1200FB 900 watt power supplies with breakout boards and I wanted to know if I can power 1 Antminer S9 on 110V.  I don't own a house and have no access to a 220v outlet. 

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November 14, 2017, 09:30:27 PM
 #7

Yes, that is possible.

Use one HP DPS 1200 for two hash boards.

Use another HP DPS 1200 for one hash board and controller.

Turn on the power supply connected to the controller last.

Do not connect the two power supplies in to same hash board, they end up "fighting" each other.

redalert11
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November 14, 2017, 09:43:32 PM
 #8

Is there any evidence showing if these are just as safe to use as the 220V AP3++ psu from Bitmain.  See I ordered a November batch which hasn't shipped yet and I have trepidations about running the S9 on 110V with this setup.  No point in running it if in a month the machine or the hashboards go bye bye. 

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November 15, 2017, 12:48:10 AM
 #9

The HP PSU's? Like all real server PSU's they are solid as a rock even when pushed over rated max. That is why the HP and IBM server PSU's are preferred by miners (with 220v). Running the HP 1200's at full 110v feed load (900w) yes the fans will go into hairdryer-mode and the supplies will get rather warm but the PSU's are made for it.

The AP3++ supplies are also perfect. Main advantage with them is all the power leads are already there so is plug-n-play. I have a couple dozen of the older APW3's and zero issues with them.

As a side note, you *do* know that these miners are LOUD and hot right? As in a perfect 1,400w space heater. That fact cannot be changed...

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redalert11
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November 15, 2017, 01:48:23 AM
 #10

Well I'll be running it in a basement which is probably around 65C in the winter and I don't really care about the noise. 

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November 15, 2017, 02:01:44 AM
 #11

65C in the winter?  Where do you live, Death Valley??  Cheesy

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redalert11
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November 15, 2017, 03:24:53 AM
 #12

sorry 65F.

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