Topic: Server Power Supply Interface Board - for standalone miners and GPU rigs - page 11. (Read 120772 times)

Hello.

Have got someone pins schema /diagram form Dell 2950 ? I don't know which pins I schould short circuit to power on PSU,and which connectors are 12V and GND.I can't find this schema.Best Regards.

Is that DC power, or power at the wall? If DC power, your numbers disagree with what I've found. If at the wall, what conversion efficiency is your supply operating at? What level of overclock?

https://bitcointalksearch.org/topic/antminer-s1-anyone-have-a-actual-wattage-476645 might be more appropriate for discussion on that topic.

I found the Ants only pull a bit over 200 watt at startup
The fan on the Ant starts full speed and then lowers after a short time
When they are hashing it drops indeed to around 180 watt if not overclocked
Total power used on a non overclocked S1 is around 360 watt consistent
When overclocking i see the Ants pull a lot more up to 525 watts.
But i already know many of those high overclocked Ants will not have a long life, as i see alot of people post their Ant suddenly stopped working or was pumping out errors.

Hi,

Got my PSU up and running now. Messy soldering, but solid joints and running very well - showing 12.25volts on all PCIe connectors.

Does anyone know how to make the PSU power on when the other one does? Can I use the green wire from the MOBO PSU to jump the two power on pins?

I'm using a Dell DPS-1520ab.

Thanks

On the board whose fan speed appears to have stopped working, make sure it's set to internal instead of external control. If it's set to external, the knob signal will be blocked from the PSU and it won't do a thing.

As for parallel, I have tested three supplies tied together working flawlessly to power five overclocked Ants. Within the next few days I'm going to test up to at least six in parallel and see how they behave. I'll be using the new V0.5 boards so I have accurate current measurements from each board.

I took 2 of the Dell supplies - and two of your boards and used them to power one S1 Antminer (one supply to each S1 board).   I forced the fan speed low by jumping the proper pins and it's been running like that for a couple of days now.  The supplies stay cool to the touch.

This S1 is not overclocked - so I believe it's probably pulling about 180 watts per board.  At that load the PSU is barely working. I was trying to keep the fan noise down and it seems to work fine.

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.

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.

(https://bitcointalksearch.org/topic/m.5754835)

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.

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.

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

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

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

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.

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.

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.

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.

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.

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.

Why are you flip flopping the antminers around like that?