Bitcoin Forum

What power supplies are recommended to this miner?

1 or 2?

2 can use an ibm 2880  with a break out board


2 can use a dps-2000 with a break out board

2 can use a dps-2500 with a break out board.

1 can use sidehack 1200 unit with a break out board

You can power 3x Avalon 7 using an IBM 2880W PSU, or 4x from a DPS-4kW setup using 1 splitter cable per hashboard.  Both these PSU's require 200+V, see my sig for details and packages.

Thank you for reply,

@philipma1957
I'm thinking to buy 2pcs a7 now. Avalon don't sell power supplies like bitmain so I have to make another order. I see that this ps which you mention are selling mainly in USA in europe is definitely harder to find :(
Another option for me is buy from bitmain this bigger ps, what do you think? better take from bitmain or looking for ibm, even from USA?

You'll get a better warranty buying from anywhere else I'm sure  ;)

Bitmain can be pretty bad/picky on their warranties (& they are very short for a PSU I'm sure) so try to avoid them...........

I'm sure sidehack or a few others can ship PSU's & cables & have a warranty too  8)

A PSU for using with this miner should have:

1) 4 PCIE 6pin power connectors;
2) more than 1200 Wt output power;
3) [optional] a possibility of voltage adjust.

You can take this (http://www.ebay.com/itm/Intel-AHW4UPWR-PS-2142-1D1-PSIN037-Lite-On-1470-Watt-Server-Power-Supply-Lot-4-/121115817974) (or some other) PSU, make and attach a cables and set up a fan on it's top side. Or sure you can buy any other PSU that meets the requirements above.

J4bberwock on the forums is based out of France, he has many different styles of server breakout boards (it is his that I sell), including common slot 1200w psu's. I would definitely hit him up.

Bitmain's PSU's are fine (just overpriced compared to alternatives IMO), but I wouldn't think it would be worth placing an order from them strictly for PSU's. Especially for the size of them, they're not quite big enough to power 2x A7's so you would need 2. I would look at the DPS-2000BB PSU and board.

Bitshopper.de in Germany stocks my DPS1200 board and bundles sturdy cables.

Thanks @philipma1957, I found couple good offers on this ps, probably I will buy for sotck in case of failure.
Please tell me last thing, could you recommend person or shop which selling break out boards to dps 2500 or 2880?

@sidehack thank you for link but 150 euro + ship for this ps is definitely too high price.

You can check http://www.price-technology.com owned by forum member Optimiser.

Send them an email, they have the boards, psus and packages and they will give you a quotation with shipping.

okay what and why use a breakout board?
My current Avalon A6 has a burned out hashboard. One board still hashing away at 1500ghs. Does the breakout board help to not burnout a board?

So if When my brand new A7 arrives tomorrow.
I'm going to use a FSP AURUM PRO 1200W 80+GOLD with 6+2pin PCI-Express graphic card connector ready.
Using the old Rpi setup from the A6.

ok, I ordered a7 but in new version 741, I saw that this new machine is a little more hungry on power so do you think that 1 dps1200 will be enough to power 1 a741? I would like to buy separately power supplies, any other recommendation to power one a741 with one power supply?

I could buy localy in good price this model (HP 441830-001 1200W DL580 G5 DPS-1200FB A 3Y warranty) - please advice me if it will be enought to 741?

Just woke up I watched a lot of late nite TV.

The psu above  is borderline for the 741.  

As to why you get a breakout board  the server psu's won't start without one.

I would say get a break out board from finksy/j4bberwock  as you are in europe.  get 6 cables

get the 2000 model  breakout board  it works for 3 psus' below

http://www.ebay.com/itm/IBM-BladeCenter-1800W-Power-Supply-P-N-74P4400-FRU-P-N-74P4401-DPS-1600BB-/262811922237? -- Good

http://www.ebay.com/itm/IBM-39Y7357-BladeCenter-Delta-DPS-2000BB-2000W-Power-Supply-PSU-39Y7358-/292001078908? -- Better

http://www.ebay.com/itm/IBM-39Y7400-BladeCenter-DPS-2500BB-2320W-Power-Supply-Unit-PSU-39Y7405-L80536J-/122158351664? -- Best

@philipma1957 thank you for links but in US evrything is easier with this hardware. Shipping cost to Poland one pcs of this power supply is 85USD + breakout board + cables + another shipping for breakout board, this will be about 250 USD total. Do you think that this is still good deal? In this price I have 2pcs bitmain apw3 1600W or one apw5 2600W and they add 12 months warranty now.

Please tell me, if I connect apw3 1600w from bitmain to a741 everything will be ok? I know that their quality isn't so perfect but I have couple apw working with s7 and nothing happened (yet). So please advice me.

Since you have 208-240v power, 1 APW3 per miner would be overkill but perfectly fine as would 2 miners on a APW5.

Key point is just to keep total load at 80% or less of a PSU rating if possible. re Bitmain PSU quality, never had an APW5 but I can say that I have >20 of the APW3 dated starting back at the 2nd batch made up to late last year: zero issues with any of them.

Thank you for recommendation. I think in my geographical location buy apw3 is one of the top option. I also still looking for on my local market dps-2000/dps-1600 with good price but without success.

I'm only worried if it will not be problem with connectors. APW3 have 5 pairs 6pins (total 10), a741 need only 6, so 4 connectors will be not connected. How it could be affected on lifetime or working power supply?

Not needing all of the plugs is not an issue. Each plug will safely carry >150w, 300w if pushed to their limits. Point is the plugs are sized for the expected load per-plug meaning the 6 plugs will easily carry 900w and more. The PSU itself does not care.