Server Power Supply Interface Board - for standalone miners and GPU rigs

[sidehack]

Yeah, me too. There's been a lot more interest than I expected, especially for bulk. Hopefully Cheshyr hears good news from his supply house about the edge connector I'm having trouble matching/locating. Hope to hear back from manufacturer CSRs soon.

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[Cheshyr]

I sent out emails to a few people I know.  It's a holiday season, so the availability of these people in the office is questionable, but I'll post anything I find as soon as I have it.

[sidehack]

Groovy. I had previously put in a sample request to Molex for what I believe should be the part (based on dimensions and CAD diagrams) and an information request to FCI for data on the power-supply-side connector. Hopefully they get back to me as soon as business starts up for the week. As soon as I get a final board design ready I'll see about putting up some basic dimensional layouts for screw holes and whatnot, in case some of you guys want to do a bit of groundwork on case designs. I'm definitely interested in seeing what folks come up with.

[bitpop]

Thank you

[amer]

This is a great project, I have a pile of old 2950 power supplies lying around that I didn't know could be used for this.

[timmah]

The pin headers on the board are for linking multiple supplies; each has an input and an output so you can either chain them (where one supply turns on the next, which turns on the next, and so forth) or run them in master/slave (where one turns them all on) and both headers tie the current share lines.

Are the headers are the 3 pin that is on your PCB?
Also if it is master/slave then does it mean that the master cables have to be split to all the PSUs that need to be powered?

The only thing you'd need to do for hotswap in parallel is make sure the ground and 12V outputs are tied into the same bus.

So, if I need 1200w to run my miner and use 3 750w PSUs then if one of then goes out I should be able to hot swap it as long as all the PSUs are still connected to the working ones, is that correct?

I wonder if I shouldn't put on a fan speed override with a linkable header so the master supply could control the speed of all linked supplies, or it could be linked to an external temp sensor driver that monitors the temperature of the exhaust air? Do people think this is useful enough to implement?

I think this would be a good/helpful feature to implement.  For me I would think temp sensor on exhaust would work well...

Thanks!

[sidehack]

Yes, the 3-pin connects are the headers, one for input and one for output. In Master/Slave you'd need one split connector (star configuration) or a long lead with multiple "taps" to tie them all together. Neither setup is difficult to assemble.

Sure, three 750W would power a 1200W load fairly comfortably with one supply down, if you bus-tie the outputs.

I'll see how much more difficult it'll be to implement. It'll require a 4-pin header and another switch for manual/external control select.

[Cheshyr]

Three of the emails I sent out came back with Out-Of-Office replies until 12/30 or later.  I'll keep you posted on the responses from the other two.

[sidehack]

Much appreciated, sir.

Does anyone have any links handy for pinout data on the HP 850/1000W edge-connect supplies? I'm finding a lot of nebulous/unreliable information, don't know if anyone's got an actual concise and informative writeup.

[Wintermute420]

I would be interested in a number of these to power some hardware.  Perhaps 10 or more.

[E]

I can strongly recommend the Delta DPS-2000BB-A for this purpose:

• 2000w, all on 12.3V(240V only, of course)
• $20 on ebay right now http://www.ebay.com/itm/DELTA-DPS-2000BB-A-IBM-PN-74P4453-2000W-POWER-SUPPLY-/181137618850
• Adjustable +12V voltage, up to ~14, and adjustable overcurrent setting

You need external air supply; no internal fans. I have links to the mod for adjustable voltage somewhere around here and will add them when I track them down.

NOT affiliated with that ebay seller.

e

[twib2]

Nice work continuing on, SH!  FWIW, the two pre-prototype powersupplies you did earlier are still hashing along nicely, running two ASICMiner Cubes each.

Sidehack does good work and good business - recommended.

[sidehack]

My new prototype board is currently running two Cubes. Good to hear those supplies are working well for you. Hopefully this design will get off the ground soon.

[RickJamesBTC]

I snatched up a few of the dps-2000bb power supplies, I'd like to get a few of these boards from you if they are compatible, or at least know where you get the main connector from, I can make my own boards on protoboard.
Thanks!

[bobsag3]

My new prototype board is currently running two Cubes. Good to hear those supplies are working well for you. Hopefully this design will get off the ground soon.

Glad to hear!

[repairguy]

I use dell power supplies that have an 1/8" aluminum case, and the case is a heatsink so they have no fans!  The connector looks similar, let me know if you find a source for them. One power supply will run 6 gpus

[joeventura]

I will need power for 3 neptunes but they must be separate

Why bother you are going to sell them a week after you get them no?  :p

[sidehack]

Because he can get more markup if he sells the power supplies too?

[bitpop]

Because he can get more markup if he sells the power supplies too?

Yes ebayers like a complete kit
BONUS power supply and preconfigured

[vs3]

Wow! A very cool idea!

Is the schematic available (let's say on github or somewhere else?)

And do you have the part number for that big black connector?