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

[precrime3]

I wouldn't tried OC'ed.....

[1713496806]

1713496806

[1713496806]

1713496806

[sidehack]

I think bobsag said they ran a couple 400MHz Ants off a single board for a week and some without issue. I haven't tried it but apparently it works.

[claudesdad]

If you can please post the Rev number(s) from the supplies you've used that have worked - I may just order some with the same Rev number instead of going too crazy modding the boards.  The supplies are all over the place on Ebay - cheap.  That's probably the easiest way out (for me at least)

Just a follow-up from this and the other thread.

The two supplies we have that are running two of sidehack's boards are both A02 revisions.

With that revision the knob knobulates as expected.  

My Rev A00 also works. 

Excellent - and excellent.

Thanks.  I see a number of Rev A00 and A02 supplies on Ebay - I'll just pickup some of those instead of trying to mod the board

[JLebowskiTheDude]

Thanks.  I see a number of Rev A00 and A02 supplies on Ebay - I'll just pickup some of those instead of trying to mod the board

That's probably the quickest solution.  Although sidehack may have has some interest in figuring out what issue is with other specific revisions in his free time after he gets other boards prototyped or produced maybe?

Yeah these supplies can get dirt cheap on eBay at least for the time being still and they're built like tanks so it was a great re-purposing of hardware sidehack and others have found. 

Kudos from us electrical n00bs would couldn't do this for ourselves we appreciate it!

[sidehack]

I'll have to compromise on the next board since the PCBs are already delivered, change parts around a bit such that you'll have full control on the ones you currently have no control over, and have full but not as precise control over the ones that currently work fine. Probably the V0.6 boards will address the different range standards with a switch setting, but for now we'll have to make do.

[claudesdad]

I'll have to compromise on the next board since the PCBs are already delivered, change parts around a bit such that you'll have full control on the ones you currently have no control over, and have full but not as precise control over the ones that currently work fine. Probably the V0.6 boards will address the different range standards with a switch setting, but for now we'll have to make do.

Sounds good.  I'm going to get some A00 or A02 supplies from Ebay so I can just use the boards I have with those.  I'm preliminarily planning to add more machines later - so if you make the boards work with the later Rev supplies I can just order some of those boards when you have them - depending on how things work out.

Do you have any of the later rev supplies?  I have some A04 and some A06 supplies.  If you're looking for some supplies to try maybe we can arrange a swap?  I 'll send you a couple of supplies for a board or something?

[abracadabra]

I'm looking forward to your DPS-2000BB board because I just got one running and it's a real monster.

I'm showing a 6.3A draw at the breaker with four overclocked Ants (2@375, 2@400).  It's max draw is 13.5A so I'm guessing I could easily put 2 maybe 3 more Ants on the power supply.

Each Ant has a dedicated 14 gauge wire back to the supply.  The wires are a little warm so 12 gauge is probably the better choice.  Once the power gets to the Ant I break it out with these cheap adapters from monoprice,

http://www.monoprice.com/Product?c_id=102&cp_id=10245&cs_id=1024503&p_id=2883&seq=1&format=2

I just cut off the molex ends and use twist nuts to tie all the wires together.  Even though it's 18 gauge wire they are room temperature.

Best part of all this.  The supply only cost me $30 on Ebay 

Why are you flip flopping the antminers around like that?

[sidehack]

I do have some of the other revision supplies to play around with. Also the remaining parts we'll need for the V0.5 boards should arrive about Tuesday and we can start manufacture, so we'll probably be shipping them in about a week. I'll have to retrain the minions, which hopefully will result in (after training) faster turnaround and a higher quality of work so's we can get you guys your stuff quicker.

[nexus99]

I'm looking forward to your DPS-2000BB board because I just got one running and it's a real monster.

I'm showing a 6.3A draw at the breaker with four overclocked Ants (2@375, 2@400).  It's max draw is 13.5A so I'm guessing I could easily put 2 maybe 3 more Ants on the power supply.

Each Ant has a dedicated 14 gauge wire back to the supply.  The wires are a little warm so 12 gauge is probably the better choice.  Once the power gets to the Ant I break it out with these cheap adapters from monoprice,

http://www.monoprice.com/Product?c_id=102&cp_id=10245&cs_id=1024503&p_id=2883&seq=1&format=2

I just cut off the molex ends and use twist nuts to tie all the wires together.  Even though it's 18 gauge wire they are room temperature.

Best part of all this.  The supply only cost me $30 on Ebay 

Why are you flip flopping the antminers around like that?

The DPS-2000BB  would be awesome. Its a 2000 Watt power supply.  You could hang a couple of those off a 30A 220v circuit and power LOTS of stuff.

[sidehack]

I'm actually gonna have to wire up a new 20- or 30-A 220V outlet so I can stress-test the DPS-2000BB boards when we get them in and ready. It'll also come in handy for future mining and server stuff. Hopefully I'll have prototype DPS-2000BB boards in hand inside of two weeks. Unfortunately faster also means stupidly expensive.

[Abraxas601]

I'm looking forward to your DPS-2000BB board because I just got one running and it's a real monster.

I'm showing a 6.3A draw at the breaker with four overclocked Ants (2@375, 2@400).  It's max draw is 13.5A so I'm guessing I could easily put 2 maybe 3 more Ants on the power supply.

Each Ant has a dedicated 14 gauge wire back to the supply.  The wires are a little warm so 12 gauge is probably the better choice.  Once the power gets to the Ant I break it out with these cheap adapters from monoprice,

http://www.monoprice.com/Product?c_id=102&cp_id=10245&cs_id=1024503&p_id=2883&seq=1&format=2

I just cut off the molex ends and use twist nuts to tie all the wires together.  Even though it's 18 gauge wire they are room temperature.

Best part of all this.  The supply only cost me $30 on Ebay 


http://i58.tinypic.com/2vb90l0.jpg

Why are you flip flopping the antminers around like that?

I'm not, I just put some extra fans on those 2.  Keeps the boards more evenly cooled but doesn't offer any performance improvements.

[Abraxas601]

I'm looking forward to your DPS-2000BB board because I just got one running and it's a real monster.

I'm showing a 6.3A draw at the breaker with four overclocked Ants (2@375, 2@400).  It's max draw is 13.5A so I'm guessing I could easily put 2 maybe 3 more Ants on the power supply.

Each Ant has a dedicated 14 gauge wire back to the supply.  The wires are a little warm so 12 gauge is probably the better choice.  Once the power gets to the Ant I break it out with these cheap adapters from monoprice,

http://www.monoprice.com/Product?c_id=102&cp_id=10245&cs_id=1024503&p_id=2883&seq=1&format=2

I just cut off the molex ends and use twist nuts to tie all the wires together.  Even though it's 18 gauge wire they are room temperature.

Best part of all this.  The supply only cost me $30 on Ebay 


http://i58.tinypic.com/2vb90l0.jpg

Why are you flip flopping the antminers around like that?

The DPS-2000BB  would be awesome. Its a 2000 Watt power supply.  You could hang a couple of those off a 30A 220v circuit and power LOTS of stuff.

Check out the specs on the DPS-2500BB.  It's even more awesomeness but hard to find.  My circuit is 20A 220V so I should be able to connect two "mostly" loaded DPS-2000BB supplies.  30A 220V would be the perfect setup for a pair though.

[bobsag3]

I'm looking forward to your DPS-2000BB board because I just got one running and it's a real monster.

I'm showing a 6.3A draw at the breaker with four overclocked Ants (2@375, 2@400).  It's max draw is 13.5A so I'm guessing I could easily put 2 maybe 3 more Ants on the power supply.

Each Ant has a dedicated 14 gauge wire back to the supply.  The wires are a little warm so 12 gauge is probably the better choice.  Once the power gets to the Ant I break it out with these cheap adapters from monoprice,

http://www.monoprice.com/Product?c_id=102&cp_id=10245&cs_id=1024503&p_id=2883&seq=1&format=2

I just cut off the molex ends and use twist nuts to tie all the wires together.  Even though it's 18 gauge wire they are room temperature.

Best part of all this.  The supply only cost me $30 on Ebay 

Why are you flip flopping the antminers around like that?

The DPS-2000BB  would be awesome. Its a 2000 Watt power supply.  You could hang a couple of those off a 30A 220v circuit and power LOTS of stuff.

Check out the specs on the DPS-2500BB.  It's even more awesomeness but hard to find.  My circuit is 20A 220V so I should be able to connect two "mostly" loaded DPS-2000BB supplies.  30A 220V would be the perfect setup for a pair though.

Yeah on 1x 6-20R, I can pull about ~3100w before I run into breaker problems, so probably 2 75% loaded DPS2000s are the max.

[jlsminingcorp]

The other option if it works on external, is rig up an external pot between the 3.3V and GND pins on the header, tap on FAN,and adjust from there.

Running one of these with a 10K external pot to control fan speed works like a charm for me. Thanks for the help sidehack .

[haploid23]

Does anyone know the part number of a backplane connector that will fit these N750P PSU?

This one here fits the DPS-2000BB and 2500BB, but I'm looking for a similar one for the 750w

http://www.digikey.com/product-detail/en/51762-10802400ABLF/609-4020-ND/1492063

[klondike_bar]

Yeah on 1x 6-20R, I can pull about ~3100w before I run into breaker problems, so probably 2 75% loaded DPS2000s are the max.

That seems a bit low for a 6-20. Assuming 208V*20A*80% = 3328W should be safe following the UL rule-of-thumb. The breaker really shouldn't be tripping until it goes over 4000W though, unless its a lower-rated 15A breaker which doesnt make much sense

[timmah]

If you can please post the Rev number(s) from the supplies you've used that have worked - I may just order some with the same Rev number instead of going too crazy modding the boards.  The supplies are all over the place on Ebay - cheap.  That's probably the easiest way out (for me at least)

Just a follow-up from this and the other thread.

The two supplies we have that are running two of sidehack's boards are both A02 revisions.

With that revision the knob knobulates as expected.  

My Rev A00 also works. 

Excellent - and excellent.

Thanks.  I see a number of Rev A00 and A02 supplies on Ebay - I'll just pickup some of those instead of trying to mod the board

The fan speed can easily be lowered safely by using the external fan control switch then a 200ohm resistor in line from the fan speed pin to the ground pin.  I just used the resistors that come with the LED packs where they throw in those resistors for free. 

It works just fine to bring it to just about the same as the lowest setting with the pot and since the only real reason that the fan spins so fast on those PSUs (or others) is that it is used to exhaust heat from the server.  These supplies could probably run even without a fan as even with full load they barely heat up.  If you open one of these you can see that the PSU PCB only takes up about 3/5 of the case so with all that extra space and all that metal housing (being thicker than standard ATX PSUs) also helps to dissipate heat

You could probably run these PSUs without a fan if you just give it some airflow, even just a regular household fan would most likely work as long as it is enough to push the stagnant air out since there is so little heat to dissipate.  Removing the fan won't work though as the PSU senses the fan and will fault if it does not see it running, very likely for the protection of the airflow for the server.

These variations of the PSU is most likely taken care of by the BIOS on the server but with the adapter these things could be missed if all the variations of PSU are not tested.

In any case, from what I've seen so far, there is one that works with the on-board pot and the other not.

Still, the simple resistor works and there is no need to make any actual modifications to the board or anything and like Sidehack said he is going to address this in the later revisions.

[sidehack]

I just tested a modification on the next batch of boards that should give touchy but reliable fan control to a wider variety of supplies. Just tested it on N750P-S0, N750P-S1, Z750P-00 Rev A00, A01 and A02. They're boards we should start shipping probably Wednesday.

(https://bitcointalk.org/index.php?topic=503423.msg5754835#msg5754835)

Yep, it's been addressed and tested.

As for running on no fan, I don't recommend it. I tend to run them on a low setting still above the bottom-end of the adjustment. The only supply I've ever had fail on me was partly disassembled, and getting almost no airflow over the components at the DC end (which are used to direct fan exposure); after running probably 85-90% load (two custom-overclocked Cubes) for a little short of a week it powered down for good. Run super-low-fan if you like, and it might work just fine forever, but officially I don't recommend it. At full load you need to be able to dissipate between 70 and 80W of waste heat.

[JLebowskiTheDude]

I'm actually gonna have to wire up a new 20- or 30-A 220V outlet so I can stress-test the DPS-2000BB boards when we get them in and ready. It'll also come in handy for future mining and server stuff.

Great.  Now I have incentive to try this myself with a few drunken buddies in some undetermined upcoming weekend.

Someone should start writing my obit now!

Btw I got our most recent order over the weekend.  Many thanks! 

I was on the road out out of town until this morning so I didn't get a chance to open it until then.

sidehack and Gekkoscience are really great people to work with.  No one should hesitate to buy from them.

[claudesdad]

The fan speed can easily be lowered safely by using the external fan control switch then a 200ohm resistor in line from the fan speed pin to the ground pin.  I just used the resistors that come with the LED packs where they throw in those resistors for free.  

It works just fine to bring it to just about the same as the lowest setting with the pot and since the only real reason that the fan spins so fast on those PSUs (or others) is that it is used to exhaust heat from the server.  These supplies could probably run even without a fan as even with full load they barely heat up.  If you open one of these you can see that the PSU PCB only takes up about 3/5 of the case so with all that extra space and all that metal housing (being thicker than standard ATX PSUs) also helps to dissipate heat

You could probably run these PSUs without a fan if you just give it some airflow, even just a regular household fan would most likely work as long as it is enough to push the stagnant air out since there is so little heat to dissipate.  Removing the fan won't work though as the PSU senses the fan and will fault if it does not see it running, very likely for the protection of the airflow for the server.

These variations of the PSU is most likely taken care of by the BIOS on the server but with the adapter these things could be missed if all the variations of PSU are not tested.

In any case, from what I've seen so far, there is one that works with the on-board pot and the other not.

Still, the simple resistor works and there is no need to make any actual modifications to the board or anything and like Sidehack said he is going to address this in the later revisions.

Thanks - I may try that.  I just picked up a batch of 16 of these supplies from a local guy today.   Just finished going thru them all because there were some different variants in there. I also tested the 6 PSU's I already had just to verify their behavior.

I've got 9 Rev A00 's that all turn on and the fan speed knob works as expected

I've got 3 Rev A08's - that turn on - but the knob won't regulate the fan speed

I've got 2 Rev A00's - that turn on - but the fan speed knob doesn't work (strange)

I've got 3 Rev A02's - that are all completely dead. I think they're really dead because I don't even get a power LED on them when I plug them in.

I've got 3 Rev A03's - that turn on - but the fan speed doesn't work

and I've got 2 Rev A05's that turn on - but the fan speed doesn't work.


I've got more than enough of the Rev A00's to power what I wanted to power  at this point.  Just thought this information might come in useful.

Seems like the first one of the boards I used - had something happen to it.  The fan speed stopped working.  I went back and retested it on a supply I had previously gotten the fan speed to work on - and it didn't work any more. Used another board - on the same ( A00) supply - and that worked fine.

Question:  is there any limit on how many of these boards can be jumped together to load share?  I've got four S1 miners - and planning on adding two more.  What I'd like to do is take a block of four of these supplies - and jump them together to supply 3 miners.  I think that would keep the load down enough on each individual supply that the fans could be run at the lowest speed with no problems.

Currently I'm running one of the S1 antminers - with two of these Dell supplies - with the fans turned down to the absolute lowest setting.  It's all in my basement where the temps don't go about 60-65F - and the two supplies are almost cool to the touch.

I'm going to contact Gekko and order more boards so I can get this going and get rid of the Corsair PSU's I'm currently using.

Oh yeah - and thanks for the tip on the resistor.  Good to know in case I have to go that route.