Topic: FOR SALE - D750 750W Server PSU Breakout Boards - page 11. (Read 47357 times)

Wire a female molex to the EON pin. Anything above 3V should kick it on.

---- Can be wired to an ATX supply to function as additional 12V "rails" on GPU rigs

How can that be done? My dog tore apart the "manual" you sent me So, any pictures or whatever would be nice.

If you can fit 'em all under the screw terminals, sure.



Which if the ATX failed, you'd have to redo all your wiring when you replace it. Also if you can find a warranteed ATX that'll reliably put out 750W all day every day at 91% efficiency for this price tag, good find. At the utility rates I'm paying in central MO, the difference between 85% and 91% at 750W output means an extra $40 a year just in electric bills, per supply. And good luck getting two of them to run in parallel if you need a single load greater than 750W; unless they're stupidly tightly regulated you'll quite possibly smoke one and trip out the other.

For $10 in parts can you have easily changeable wiring options, fan speed control, an efficient 5VDC 2A auxilary source, a built-in current meter and the ability to turn the supply on from an external signal? I'm all for people doing stuff for themselves, but I'm also all for supplying well-made stuff to the people that would rather not, and all for making something simple, reliable and with a respectably useful feature set. You are probably not my target customer. In fact I am not my target customer either, as proven by that I'm building them myself instead of waiting for someone else to make and sell it.

So could I hook up as many 2.5mm 12V power cords as I want to these terminals as long as I stay under 750W total? I am looking at buying some of these if this is possible. Basically I would like to hook up about 50 Gridseed asics.

So 50 of these 2.5mm power cords. http://www.minute-man.com/acatalog/PHILMORETC218.jpg

Let me know.

Thanks.

I like your attitude! +1

Personally though, I would rather put that money towards an warrantied ATX PSU or spend an hour and $10 of supplies to do some home soldering

We could save on costs by outsourcing manufacture to China, but I'll be in my grave before I give away American jobs. As it is, the price is dictated by the cost of materials and labor. We're looking at ways to alter the board design on a future batch to reduce assembly time and save a bit of materials, but that won't kick in for a while. Quality materials and quality workmanship (at least that's what we're trying to do) are more important to me than most anything else.

+1 for a great guy, we have well over 200 of these without an issue

looks great!

hope you can get some lower prices on the next batch though

[email protected]

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Some of you may have been following the development thread https://bitcointalksearch.org/topic/server-power-supply-interface-board-for-standalone-miners-and-gpu-rigs-379677

What I have designed is a board that interfaces to a Dell PE2950 server power supply, part Z750P or N750P. These supplies are rated for 750W output (12V, 62.4A) and, being industrial-grade, are designed to sustain rated outputs almost indefinitely.



The PSU boards themselves socket onto the server supply and break the 12V out to screw terminals for attaching cables. We also have 18" 16AWG PCIe 6-pin cables available for sale with the boards.

Some of the features/benefits of these boards and supplies:
 - Ability to load-balance multiple supplies in parallel for redundancy or higher outputs
 - Replacement supplies can be found for less than $20, compared to >$100 for comparable performance consumer supply
 - If a supply fails, replace it by unplug/replug without having to touch wiring
 - User-defined wiring means no octopus of unnecessary cables
 - External power-on signal, can be wired to a "master" PSU so multiple supplies turn on simultaneously and automatically
 ---- Can be wired to an ATX supply to function as additional 12V "rails" on GPU rigs
 - >90% efficiency across most of the load range
 - Integrated current measurement, you can keep track of actual load consumption*
 - Integrated 3.3VSB and 5VDC 2A supplies
 - Internal and external fan speed control for PSU's internal cooling fan

*current measure is not officially supported (inaccurate measurement) in V0.4 boards, currently the only ones available, but the issue was fixed on the V0.5 boards which will start shipping probably in about two weeks.

The actual product page is http://www.gekkoscience.com/products/D750_supply_breakout_board.html

One supply will easily support two Cubes on full overclock or two stock-speed AntMiner S1 units. Some testing was done with two overclocked AntMiner S1 operating but I don't recommend it. I do have four S1 at 400MHz running flawlessly off three supplies load-balanced; I should be able to add a fifth without overloading. I also have one running a GPU in my workstation, using the EON input tied to the ATX supply so it powers on with the rest of the computer.


The current offering is Reduced-Feature boards, which do not have Current Sense or 5VDC. These features were not often used, so removing them by default saves the customer money. They also have a smaller fan-speed pot and a push-on/push-off power button because we were having reports of toggle switches breaking off. We can, by request, populate boards to the previous standard (toggle, fan knob, current sense, 5VDC) for any order.

Pricing on Reduced-Feature Boards:
1-5 $28 apiece
6-10 $26 apiece
10-25 $24 apiece.

Pricing on 16AWG 6-pin PCIe Cables:
18" $3.50 apiece
36" $4.50 apiece

Full Kits include 1xZ750P PSU, 1xInterface Board, 4x 18" cables for $55

Shipping will be fulfilled by USPS Priority. Domestic shipping rate estimates:

Up to 5 boards + 20 cables, $10
Up to 20 boards + 80 cables, $20
Up to 3 full kits, $15

We accept both PayPal and BTC payments, where BTC will be based off the dollar value and a CoinBase exchange grabbed randomly sometime during the day.

For ordering information, email "[email protected]" and I'll get back to you as soon as I can. We are shipping from standing stock.
If you have questions about anything and want a more-or-less immediate answer, either read the development thread or use the email above.