Gauging interest in a S5+ / 3xS7 specific power supply breakout board

[fullzero]

see if this works in the sonotube or the vent pipe right above

I tested a similar idea with an S5+ 1/3.  I took a Block Erupter Cube Case (already has 120mm fan attachments) and added acoustic foam in three levels with V cuts on each level.  Looked like

        
|VVVV|
|VVVV|
|VVVV|
|       |     

It was very effective at dampening the sound, and didnt effect temp more than 1C.  However, the foam is not designed to interact with that much heat.  The air becomes thick with offgassing from the foam ( its not worth potentially getting cancer IMO ).


J4bberwock I am interested in a breakout board.

[notlist3d]

What is the price you will be having on PCI-E connectors?  Will you carry those?

Also will you be selling the PSU's and what price?

I'm just trying to gauge price to get whole package set up.

[mavericklm]

this is clearly geared towards s7 so why add the 6pins connectors on the board?! just solder directly the wires.... also half crimping or whatever is called on the wires...
the monster will fit perfect between s7s on its side and ~5cm higher for good airflow

[MarkAz]

see if this works in the sonotube or the vent pipe right above

I've bought a fair amount of acoustic foam and this is the best place I've found for buying it.  I literally just bought some to do some additional soundproofing.  Typically they're cheaper than the eBay sellers, and are consistent in quality (I believe they actually do the manufacturing on some if not all of the types):

http://www.thefoamfactory.com/

 

[J4bberwock]

First trials with the parts I had in hands, I was able to get the PSU down to 11.78v (12.25v is my stock voltage).
More tests when I'll get a few parts delivered.

[MarkAz]

First trials with the parts I had in hands, I was able to get the PSU down to 11.78v (12.25v is my stock voltage).
More tests when I'll get a few parts delivered.

If you're getting some good undervolting, then up my quantity from 10 to 20. 

[klondike_bar]

this is clearly geared towards s7 so why add the 6pins connectors on the board?! just solder directly the wires.... also half crimping or whatever is called on the wires...
the monster will fit perfect between s7s on its side and ~5cm higher for good airflow

this is a good point - a version with a multiple terminals (possibly with their own secondary power switches) might be cheaper to build and the 1-ended wires (I sell these and also PCIe-PCIe in my sig *shamleess self promotion*) are about 10-15% cheaper

[MarkAz]

So do you feel there is enough interest to do your first run, and if so, when do you think you'd do it?  I'm in need of some more power, so just trying to plan if I should hold out or pick something up now...

[J4bberwock]

So do you feel there is enough interest to do your first run, and if so, when do you think you'd do it?  I'm in need of some more power, so just trying to plan if I should hold out or pick something up now...

There is enough interest for a batch.
I'll order everything to make the first 150 boards.
Estimated shipping time for the first boards will be 5th-9th of october.

I'll confirm price with options in a few days once I have the reply for the side plates manufacturing.

[dance191]

So do you feel there is enough interest to do your first run, and if so, when do you think you'd do it?  I'm in need of some more power, so just trying to plan if I should hold out or pick something up now...

There is enough interest for a batch.
I'll order everything to make the first 150 boards.
Estimated shipping time for the first boards will be 5th-9th of october.

I'll confirm price with options in a few days once I have the reply for the side plates manufacturing.

I love the idea for the side plates, but I am not sure if the shipping costs will be worth it.  J4bberwock, if you could price the boards with and without the side plates that would be great.

This project is exactly what is needed for the S7, I am excited!!!

[MarkAz]

Sideplates are critical to me - since these PSU's don't have fans in them, I can't imagine why you wouldn't want the side plates, and I doubt they would effect shipping in a substantial way.  Plus then you're going to end up having to hack some sort of fan option anyway, so why not have a nice clean option from the get go.

[mindtrip]

i would be interested in 2 or 3 of these once you have everything finalized let me know

[dance191]

Sideplates are critical to me - since these PSU's don't have fans in them, I can't imagine why you wouldn't want the side plates, and I doubt they would effect shipping in a substantial way.  Plus then you're going to end up having to hack some sort of fan option anyway, so why not have a nice clean option from the get go.

Air shipping metal plates across the planet tends to be somewhat wasteful when a simple zip tie does the job.  But, I don't know the exact price for the plates with shipping, which is why I was simply asking for the 2 pricing options.  Once we know the price, we could make an informed decision.

If I zip tie the 2 fans or mount the fans to the plates it is about the same amount of work.  So, if it costs much more for the plates (with shipping), personally I would pass.  Like I said, I love the idea of them, but they might not be necessary if the added expense is high enough it can't be justified.

P.S.  Thanks for the foam link, that looks like a decent place.

[J4bberwock]

I'll be testing undervolting the PSU below 11.8v this afternoon.

Regarding the sideplates, I believe almost everybody will take them, but they will be offered as options, as well as the small voltmeter. Once the voltage is set on one PSU, you  can use the same for the next PSU, so there is no real need to charge you one for each breakout board unless you like to see the LEDs.
There will be a header to easily plug/unplug the voltmeter.

[dance191]

I'll be testing undervolting the PSU below 11.8v this afternoon.

Regarding the sideplates, I believe almost everybody will take them, but they will be offered as options, as well as the small voltmeter. Once the voltage is set on one PSU, you  can use the same for the next PSU, so there is no real need to charge you one for each breakout board unless you like to see the LEDs.
There will be a header to easily plug/unplug the voltmeter.

J4bberwock, you are the man!  No matter what people are trying to do, you offer a perfect solution for them, thank you very much!!

[J4bberwock]

Update on the voltage regulation:
I managed to go down to 11.58v, the extra cost will be around $4, I'm not sure it's worth it for the small gain we'll have in efficiency.
Below 11.58v doesn't seem possible via external adjustment.

On the S7, we'll power the chips with 0.64v instead of 0.67v, so efficiency would be close to 0.22W/GH instead of 0.25W/GH

Overvolting the S7, assuming you can provide sufficient cooling should offer the following results:
12.9v input, 0.30W/GH, 5,65TH (1700w at the wall)

Undervolting at 11.6v input should give something like this:
0.22W/GH, 3.7TH, (840W at the wall)

Obviously, Bitmain won't offer any support if we overvolt/undervolt the S7.

[J4bberwock]

After a little bit of cheating (opening the PSU to adjust the voltage down to 11.8v), I'm now able to output 11.18v with external adjustment.

So, final design should be able to do from 11.2v to 13.0v to cover all the voltages supported by the BM1385 chips (0.60v to 0.71v) if you open the PSU and trim one potentiometer that is easy to access.
Without opening the PSU, the lowest voltage will be 0.6v below the original voltage of your PSU, and max voltage will be 1.2v over the original voltage.

I'll test load the PSU at both output voltages with some S5s during 1 or 2 days before I send a design for manufacturing the PCB.

[E]

Sideplates with M3 threads (nutserts or similar) to attach both PSUs together and make the 120mm fans installation easier: 2 screws to remove from the PSUs, attach the plate, screw the fans, "et voila".

Expected price: $55.
Maximum size of first batch will be 150 boards.

Looks great! A few suggestions, if they don't make fabrication unreasonable:

First:

(From this presentation - slides 6 through 12 are the meat.)


Second:
The DPS-2000BBs cool better if they're spaced ~0.5cm apart and parallel - the ventilation holes
occupy a more favorable part of the fan disc and the flow between the units exposes a decent
area of hot metal and lowers the static pressure...



Really looking forward to this!

[mindtrip]

After a little bit of cheating (opening the PSU to adjust the voltage down to 11.8v), I'm now able to output 11.18v with external adjustment.

So, final design should be able to do from 11.2v to 13.0v to cover all the voltages supported by the BM1385 chips (0.60v to 0.71v) if you open the PSU and trim one potentiometer that is easy to access.
Without opening the PSU, the lowest voltage will be 0.6v below the original voltage of your PSU, and max voltage will be 1.2v over the original voltage.

I'll test load the PSU at both output voltages with some S5s during 1 or 2 days before I send a design for manufacturing the PCB.

Id be willing to pay the extra bucks for the ability to control voltage this board will out last my S7 into future projects all of which id love the options to over or undervolt at my discretion if that can be an option id be all for it

[J4bberwock]

Sideplates with M3 threads (nutserts or similar) to attach both PSUs together and make the 120mm fans installation easier: 2 screws to remove from the PSUs, attach the plate, screw the fans, "et voila".

Expected price: $55.
Maximum size of first batch will be 150 boards.

Looks great! A few suggestions, if they don't make fabrication unreasonable:

First:

(From this presentation - slides 6 through 12 are the meat.)


Second:
The DPS-2000BBs cool better if they're spaced ~0.5cm apart and parallel - the ventilation holes
occupy a more favorable part of the fan disc and the flow between the units exposes a decent
area of hot metal and lowers the static pressure...



Really looking forward to this!

Thanks for the tech data.
I'll have the sideplates laser cut or something similar, so using optimized holes won't be an issue.

Regarding the spacing, I'll anyway have 5mm to 6mm between the plate and the PSUs because of the standoffs and some clearance for the M3 threads used for mounting the fans.
It wasn't on purpose for a better cooling according to your second remark, but it's good to know that it will help.