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

[kaimee]

Thanks for the advise. 

Thinking about it, I think I'll use the spade connectors but spot solder them into place. That should keep them secure but also mean I can easily revert it with a solder pump/wick. I can heatshrink them as a final measure to secure them in place. I don't want to make a mess of the connector, but equally don't want to risk creating a fire hazard! 

[minternj]

TL;DR this thread, when are you selling the connectors?

[sidehack]

Iunno. Things are moving slower than I would like, but probably first part of next week we'll have a basic webstore site and standing inventory. We just started manufacture on Friday, but some of the critical components were shipped about 5% of what we needed due to an inventory mixup, but we should have the rest tomorrow or Wednesday and start batching boards at hopefully a decent pace.

[BotwinBG]

So first are Dell N/Z750P compatible boards, then the HP DPS-800 and then the IBM DPS 1.4-2.5kW ?

[sidehack]

Yes. Once we get manufacture streamlined on the Z750 boards, I get to take a day or two off and design the DPS800 boards. And then the DPS2000 boards.

[klondike_bar]

Yes. Once we get manufacture streamlined on the Z750 boards, I get to take a day or two off and design the DPS800 boards. And then the DPS2000 boards.

DPS-800GB A?

I just hand-soldered two of these to operate and maintain 12V (short pin 31->34 and 30->12V) but would love to see a simple attachment made for them to avoid some of the annoying close-quarters soldering on the side-by-side pins 30&31

I have a box of about 20 of these things that I plan to convert if the 2 test units work.

ps: any good method for load-testing 12V at 200W, 500W, or 700W?

[sidehack]

Yep, the DPS-800GBA same as all the Blade backplanes use (if I'm remembering right). The board will also integrate current monitoring, and hopefully load balancing, same as the Z750P boards.

As for load-testing high power, I've used multiple Cubes so far but am working on a water-cooled adjustable dummy load for up to 2000W basically using current feedback to drive a parallel set of bigass FETs. Otherwise... dunno? Bunch of truck headlights?

[repairguy]

DPS-800GB A?

I just hand-soldered two of these to operate and maintain 12V (short pin 31->34 and 30->12V) but would love to see a simple attachment made for them to avoid some of the annoying close-quarters soldering on the side-by-side pins 30&31

I have a box of about 20 of these things that I plan to convert if the 2 test units work.

ps: any good method for load-testing 12V at 200W, 500W, or 700W?

A bunch of coffee pots or hot plates from the good will.

[klondike_bar]

Yep, the DPS-800GBA same as all the Blade backplanes use (if I'm remembering right). The board will also integrate current monitoring, and hopefully load balancing, same as the Z750P boards.

As for load-testing high power, I've used multiple Cubes so far but am working on a water-cooled adjustable dummy load for up to 2000W basically using current feedback to drive a parallel set of bigass FETs. Otherwise... dunno? Bunch of truck headlights?

 have just modified a DPS-800GB A power supply following the instructions;
pins 31 + 34
pins 30 + 12V

and testing without load i see a voltage of 12.8V - without the 30+12V pins shorted, voltage seemed much closer to 12.0V

I do NOT want >12.2V since this is for computer components rather than RC battery charging - Is the pin 30+12V connection designed to achieve a higher (12.8V) output, or will it drop to 12.0V once a load is applied? I followed instruction on the rcgroup forums

[klondike_bar]

Yep, the DPS-800GBA same as all the Blade backplanes use (if I'm remembering right). The board will also integrate current monitoring, and hopefully load balancing, same as the Z750P boards.

As for load-testing high power, I've used multiple Cubes so far but am working on a water-cooled adjustable dummy load for up to 2000W basically using current feedback to drive a parallel set of bigass FETs. Otherwise... dunno? Bunch of truck headlights?

 have just modified a DPS-800GB A power supply following the instructions;
pins 31 + 34
pins 30 + 12V

and testing without load i see a voltage of 12.8V - without the 30+12V pins shorted, voltage seemed much closer to 12.0V

I do NOT want >12.2V since this is for computer components rather than RC battery charging - Is the pin 30+12V connection designed to achieve a higher (12.8V) output, or will it drop to 12.0V once a load is applied? I followed instruction on the rcgroup forums

with some testing, found my solution:
shorting pins 31+34 turns on the system, with about 12.3V idle and 12.09V under a 400W load
shorting  pin 30 + 12V results in it jumping to about 12.8V (good for rcgroups, but not computer equipment)

no issues after about 15 minutes now

EDIT: MASSIVE FML - I assumed that because one PSU worked great the other would, and didnt fully test it before installing it at the very bottom of my crate build under 2 antminers and the working DPS-800GB. Had to cut all the power lines to the antminer (the antminer was also buried at the bottom of the build) and route them to a working supply

[sidehack]

I don't have specific numbers, but most server supplies I've seen have a typical-load efficiency of 89-93%

[ktbken]

Yep, the DPS-800GBA same as all the Blade backplanes use (if I'm remembering right). The board will also integrate current monitoring, and hopefully load balancing, same as the Z750P boards.

As for load-testing high power, I've used multiple Cubes so far but am working on a water-cooled adjustable dummy load for up to 2000W basically using current feedback to drive a parallel set of bigass FETs. Otherwise... dunno? Bunch of truck headlights?

 have just modified a DPS-800GB A power supply following the instructions;
pins 31 + 34
pins 30 + 12V

and testing without load i see a voltage of 12.8V - without the 30+12V pins shorted, voltage seemed much closer to 12.0V

I do NOT want >12.2V since this is for computer components rather than RC battery charging - Is the pin 30+12V connection designed to achieve a higher (12.8V) output, or will it drop to 12.0V once a load is applied? I followed instruction on the rcgroup forums

with some testing, found my solution:
shorting pins 31+34 turns on the system, with about 12.3V idle and 12.09V under a 400W load
shorting  pin 30 + 12V results in it jumping to about 12.8V (good for rcgroups, but not computer equipment)

no issues after about 15 minutes now

EDIT: MASSIVE FML - I assumed that because one PSU worked great the other would, and didnt fully test it before installing it at the very bottom of my crate build under 2 antminers and the working DPS-800GB. Had to cut all the power lines to the antminer (the antminer was also buried at the bottom of the build) and route them to a working supply

Are you using 1xDPS-800GB to power 2 Ants or just one? Also...what's the efficiency of the DPS-800GB? I mean is it 80+ 90+ or worse than that?!

I run 2 ants per dps-800gb with no issues this is on 240v. The fans in the psu do spin up pretty loud compared to running just one ant per psu though.
The spec for ATX 12v power allows for up to 12.6v so I think 12.8 will be fine. I run mine at this.
  

[bobsag3]

Heres some pics of my first 2:
https://www.dropbox.com/s/91mzwea4pj04urt/Photo%20Jan%2028%2C%202%2059%2014%20PM%20%281%29.jpg
https://www.dropbox.com/s/be34d68axmxr16o/Photo%20Jan%2028%2C%202%2059%2009%20PM%20%281%29.jpg

[freddyfarnsworth]

I think some info is needed, for the people who do not quite get it yet, plain jane below:

These server Power Supplies:

Originally costs 2000+ dollars were bought as spares in case of failure, they were all Hotswappable (redundant)
Protected the most valuable data at the time.

Close to 100% efficiency with a Mean Time Between Failure (MTBF) of years (400000hrs plus) All 100% UL approved.

Make all but the very best PC supplies look like Junk, toys.... take one apart and look at it, beautiful expensive components inside.

You can arc weld with these supplies, all day.

Scrapped out for pennies on the dollar, during the energy crisis years ago, Bygone era. Never again to be seen.

I had 30-40 big old servers (PPRO PIIIxeon 4 6 8 way) on 300amp commercial main, and the breaker was warm. Two to four of these type power supplys in each box.

Why would you even compare a PC supply to these ? There is none.

The Negative on em is only the powerdraw, if you can live with that, these are perfect for what we use them for.

And now sidehack has made it easy to use for hobbiests who did not come from a blue collar (electrical/mechanical/engineering) background.

Be happy, I am. Cost of PS for your big rigs, has just evaporated Get ten of these adapters. I must have 100's of these powersupplies, all different kinds.

[Prelude]

I think some info is needed, for the people who do not quite get it yet, plain jane below:

These server Power Supplies:

Originally costs 2000+ dollars were bought as spares in case of failure, they were all Hotswappable (redundant)
Protected the most valuable data at the time.

Close to 100% efficiency with a Mean Time Between Failure (MTBF) of years (400000hrs plus) All 100% UL approved.

Make all but the very best PC supplies look like Junk, toys.... take one apart and look at it, beautiful expensive components inside.

You can arc weld with these supplies, all day.

Scrapped out for pennies on the dollar, during the energy crisis years ago, Bygone era. Never again to be seen.

I had 30-40 big old servers (PPRO PIIIxeon 4 6 8 way) on 300amp commercial main, and the breaker was warm. Two to four of these type power supplys in each box.

Why would you even compare a PC supply to these ? There is none.

The Negative on em is only the powerdraw, if you can live with that, these are perfect for what we use them for.

And now sidehack has made it easy to use for hobbiests who did not come from a blue collar (electrical/mechanical/engineering) background.

Be happy, I am. Cost of PS for your big rigs, has just evaporated Get ten of these adapters. I must have 100's of these powersupplies, all different kinds.

Thanks for the interesting post. I disagree with the bolded text, though. I'm holding a 2000w Delta monster right now that's about 91% efficient at full load, so that's a bit better than the 2 Seasonic 1000w units I'll be replacing and a hell of a lot cheaper too! Had a bit of fun taking it apart earlier. Much higher quality than any consumer power supply, for sure.

[Xer0]

power draw, energy crisis? i heard these are up to 95% efficient

[klondike_bar]

Heres some pics of my first 2:
https://www.dropbox.com/s/91mzwea4pj04urt/Photo%20Jan%2028%2C%202%2059%2014%20PM%20%281%29.jpg
https://www.dropbox.com/s/be34d68axmxr16o/Photo%20Jan%2028%2C%202%2059%2009%20PM%20%281%29.jpg

wonderful! when will they be for sale?

[klondike_bar]

Yep, the DPS-800GBA same as all the Blade backplanes use (if I'm remembering right). The board will also integrate current monitoring, and hopefully load balancing, same as the Z750P boards.

As for load-testing high power, I've used multiple Cubes so far but am working on a water-cooled adjustable dummy load for up to 2000W basically using current feedback to drive a parallel set of bigass FETs. Otherwise... dunno? Bunch of truck headlights?

 have just modified a DPS-800GB A power supply following the instructions;
pins 31 + 34
pins 30 + 12V

and testing without load i see a voltage of 12.8V - without the 30+12V pins shorted, voltage seemed much closer to 12.0V

I do NOT want >12.2V since this is for computer components rather than RC battery charging - Is the pin 30+12V connection designed to achieve a higher (12.8V) output, or will it drop to 12.0V once a load is applied? I followed instruction on the rcgroup forums

with some testing, found my solution:
shorting pins 31+34 turns on the system, with about 12.3V idle and 12.09V under a 400W load
shorting  pin 30 + 12V results in it jumping to about 12.8V (good for rcgroups, but not computer equipment)

no issues after about 15 minutes now

EDIT: MASSIVE FML - I assumed that because one PSU worked great the other would, and didnt fully test it before installing it at the very bottom of my crate build under 2 antminers and the working DPS-800GB. Had to cut all the power lines to the antminer (the antminer was also buried at the bottom of the build) and route them to a working supply

Are you using 1xDPS-800GB to power 2 Ants or just one? Also...what's the efficiency of the DPS-800GB? I mean is it 80+ 90+ or worse than that?!

I run 2 ants per dps-800gb with no issues this is on 240v. The fans in the psu do spin up pretty loud compared to running just one ant per psu though.
The spec for ATX 12v power allows for up to 12.6v so I think 12.8 will be fine. I run mine at this.
  

I have been running 1 per ant so far, but am tempted to try 2 ants on a single DPS-800 since it has closer to 840W at 120V. I would assume fan noise may get crazy though, so I have been avoiding it so far!

EDIT: running two antminers on a single ATSN-7001044-Y000 (identical to a DPS-800GB) at stock speeds with no issues for 30min. If it can keep stable I will try overclocking to 375 or 387.5

[bobsag3]

Heres some pics of my first 2:
https://www.dropbox.com/s/91mzwea4pj04urt/Photo%20Jan%2028%2C%202%2059%2014%20PM%20%281%29.jpg
https://www.dropbox.com/s/be34d68axmxr16o/Photo%20Jan%2028%2C%202%2059%2009%20PM%20%281%29.jpg

wonderful! when will they be for sale?

Based on timelines, mid-late feb for my first batch of extras that I dont think Ill need.

[CroverNo01]

Heres some pics of my first 2:
https://www.dropbox.com/s/91mzwea4pj04urt/Photo%20Jan%2028%2C%202%2059%2014%20PM%20%281%29.jpg
https://www.dropbox.com/s/be34d68axmxr16o/Photo%20Jan%2028%2C%202%2059%2009%20PM%20%281%29.jpg

wonderful! when will they be for sale?

Based on timelines, mid-late feb for my first batch of extras that I dont think Ill need.

Looking good, if you can add me to a list if you have one when these come available, Cheers