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hey anyone know how loud this is i ordered one ....

http://www.ebay.com/itm/252701978823

By the looks of it sounds like it's going to be an absolutely earshatteringly loud psu. I don't know for sure but three front fans and being from delta doesn't help much.

This will be a very loud PSU. Those small fans spin at 15000rpm or more and make a ton of high pitched noise

and  it won't be platinum  as the plat rating is made  without the fans.

those fans will pull  25 watts each.  and that is 75 watts
 which is 3%   so it will be more like 90 or 91  not 94

I know this from the   ibm 2980  which pulls around 70 watts for the fans.


http://www.ebay.com/itm/39Y7415-Ibm-2980watt-Ac-Power-Supply-For-Bladecenter-H-/152376201270?


I was able to mod them and use optimizer's  boards   the fans I used pulled 30 watts and were quieter.


I run 2 avalon 721's or 2 s9's  forgot  which is which

could you link the replacement fans

and ty everyone else i get that feeling to very loud but couldn't turn down a brand new 2400 w psu for 44 $ free shipping, i have two of a X Adapter Rev:6, I was told should run it ,, there not to bad..http://www.ebay.com/itm/371667776770?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

https://www.amazon.com/Bgears-b-Blaster-90mm-Bearing-Extreme/dp/B0043GQJ5M/ref=sr_1_2?

3 of these  use half the power and are not as loud.  but  i use 2200 of 2980 watts on the ibm 2980's

if you use 2200 of 2400 watts on the psu in your link I don't know if these will work.

Funny, I ordered one of those also to check out - there's another forum member selling one with screwdowns in the marketplace.  He said that the fans are thermally controlled, so if that's the case then it might be a good option - but as others have said, those small fans are brutally loud.  I used those same IBM PSU's, and I ended up modding them to use a single thermally controlled 120mm fan which made them MUCH more pleasurable to use.  2400w gives a ton of headroom for my applications, so I'm hoping they're run pretty cool on their own - but keep in mind that PSU's have an efficiency curve, so if you're using too much or too little power, you'll stand to loose a couple % of efficiency.

wow this PSU  is all most not heard all i hear is the A6 fan and my A6 is running  @ 3.4 th @ 420 or so , if I set it to 500 it actually hashes like it should and the Voltage actually holds at 12.1/2 ...
The PSU is brand new , or smells and feel that way ... so for 44 bucks you can't beat it ..the full kit on Ebay sells for 107 with the X Adapter Rev:5 I'm using version 6 link is below..

two of these can power it http://holybitcoin.com/product/gekkoscience-dual-purpose-dps800-dps1200hp-common-slot-breakout-board/ with out issue

two of these without problems http://holybitcoin.com/product/hp-1200-watt-common-slot-psu-bundle/ or  J4bberwock  Breakout Board for the 1200 watt psu

two of these http://www.ebay.com/itm/371667776770?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

it's amazing how quite it is ...


I'm actually afraid to leave it at 500 now because it hashes @ 4.2 th @ 12.2 volts according to the software Avalon supply's and the fan spins at max speed, it over heats to much for me .. so I leave it just below 450 that seems to be the best all around for temps and speed ...

I was gonna sell the A6 i don't think i will now ...I'll post a Screen shot after it hashes two hours i want see if it holds up ..

over all best thing i bought in a while or some thing that is worth the money .....

https://i.imgur.com/dR8koyK.png

Hi,

Having a couple issues with these power supplies.

I have a three phase 200amp services and I am trying to run 12 Avalon 741. When I have all of them running I have lights flickering. In my calculations I have plenty of room and I don't understand why I am running into issues.

Any input or suggestions would be greatly appreciated.

Thanks

Why do folks always leave out giving us at least *some* details other than 'it doesn't work...'  ::)
Ya know, things like what kind of 3-phase? Delta, Wye, Wild-leg (one phase center tap'ed for 120v)?
What is phase-to-phase voltage?
Are the miners reasonably balanced across the phases?
etc.