Topic: FOR SALE - D750 750W Server PSU Breakout Boards (Read 47437 times)

So just contact him though his website, Gekoscience.com.... Too obvious a solution eh?

@goose72  Do you realise that you just quoted a five years old post?

[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.

http://www.gekkoscience.com/products/D750_img/main_D750.JPG

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.

International shipping prices depend on whether you want just the board and cables, or a full kit including a PSU. Full kits ship up to three in one flat-rate box for $65; non-kit orders will have to be bid individually.

Full kits are $55; interface boards are $28 apiece ($26 for more than 5) and our 18" cables are still $3.50 apiece while 36" cables are $4.50

Yes, yes we are.

We've got about a dozen and a half boards available, which can be boards or full kits. DPS-2000BB boards are also shipping from stock.

- >90% efficiency across most of the load range