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

[J4bberwock]

I've been working on something since april or may, it evolved with the S5+, and another time with the announcement of the S7.

Since pictures may speak better than words, here are some first shots of the prototype:





http://imgur.com/a/nZIA7

Tech specifications:

4 layers of copper, 2oz on each layer
4000w output with 2x DPS-2000 BB.
30x PCI-E connectors
On/off switch
Optional adjustable output voltage from 12v to 13.7v on the older DPS-2000 BB PSUs
Optional voltmeter if you want to adjust the output.

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.

Here are the pricelist and options:

Standard board without voltage adjustment:
1-25 boards total ordered -> 57$
26-50 boards total ordered -> 54$
51-100 boards total ordered -> 50$
over 100 boards total ordered -> 47$

Options:
Sideplate: $6
Adjustable voltage option: $5.5
Voltmeter with pin header matching the boards: $5.5

No volume discount available on options for now, my buy price is quite high.


Interest so far:

Username	Qty needed	Qty sideplates	Qty volt. adj.	Qty voltmeter	Paid in full	Shipped
dance191	10+	?	10+	?	yes	yes
klondike_bar	1-2	?	?	?	no	.
pinhead666	1	?	?	?	no	.
MarkAz	10-20	0	?	?	yes	yes
philipma1957	1	?	1	?	no	yes
Tupsu	4	?	?	?	yes	yes
fhh	2	2	2	2	yes	yes
fullzero	1	1	1	1	no	.
mindtrip	2-3	?	2-3	?	no	.
sloopy	1	1	1	1	no	.
jjiimm_64	?	?	?	?	no	.
jstew	?	?	?	?	no	.
Exoskeleton	10	?	?	?	yes	yes
--	00	00	00	00	no	.
shacky	10	10	00	00	no	.
smracer	20	00	00	00	yes	yes
--	00	00	00	00	no	.
--	00	00	00	00	no	.

First 50 sold. Shipping in progress.
Next batch in 10 days, 150 boards.

[chitolsp]

OMG! This looks great

[mavericklm]

nice!
are the right and left part corresponding to the psu's or how do i know i don't power same blade from 2psu's?

[klondike_bar]

very interested. id likely take 1-2 of them.

dps2000 is nice because you can use any fans you like to control noise levels

[sidehack]

We were working on an idea like that earlier this year too; never got to prototype but the idea is sound.

[pinhead666]

I'll take one.I like these dps-2000s too.

[J4bberwock]

nice!
are the right and left part corresponding to the psu's or how do i know i don't power same blade from 2psu's?

This board acts like a single 4000w PSU, no need to worry about which plug to connect here ot there

[MarkAz]

What happens if one of the power supplies dies, will the entire thing gracefully shut down?  Is the DPS-2000BB platinum rated also?

I'd be in for at least 10...

[notlist3d]

What would a full kit look like on price?   One with board, PSU's, all PCI-e cables, etc.

And congratz that is one heck of a PSU, nicely done.

[mavericklm]

same question as above!

does it work with other dpsxx00bb psu's?

do the load balance between them? or do you make some electronic modifications to the psu's
from what i know there is always a imbalance or something like that

[philipma1957]

yeah I have 2 s-7's on order.

I have 240 volt power.

I may want it.

boy if power went from 11 to 12.7   rather then 12 to 13.7 

as I suspect underclock may be better for some of us.

I am going to do various sound tests using. the items in the screen shots.  note the photos are lifted from ebay but I got some of it local for better prices.

the goal is 25db sound reduction

[philipma1957]

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

[mavericklm]

@Phil: why don't you try some ghetto ducting 2 or 3 12cm fans into 1?!?!?
my idea is move both fans that the s7 is coming with, on a duct at the front

[QuintLeo]

Optional adjustable output voltage from 12v to 13.7v on the older DPS-2000 BB PSUs
Optional voltmeter if you want to adjust the output.

 Would make a TON more sense to be able to adjust the voltage BELOW 12v, but I suspect that's a PS-based limitation?

[anamichii]

nice 4k bracket board 
but hard to find dps-2000 in my country.

[J4bberwock]

Optional adjustable output voltage from 12v to 13.7v on the older DPS-2000 BB PSUs
Optional voltmeter if you want to adjust the output.

 Would make a TON more sense to be able to adjust the voltage BELOW 12v, but I suspect that's a PS-based limitation?

S7 Specifications:

1. Ideal Hash Rate: 4.86 TH/s

2. Power Consumption: 1210 W (at the wall, with APW3, 93% efficiency, 25C ambient temp)

3. Power Efficiency: 0.25 J/GH (at the wall, with APW3, 93% efficiency, 25°C ambient temp)

4. Rated Voltage: 12.0V+5%, should not be less than 12.0V

And I'm still looking at a way to go under 12v because it can be interesting with the Ant S5 for example, but if it's even possible, it will very likely need extra components.

What happens if one of the power supplies dies, will the entire thing gracefully shut down?  Is the DPS-2000BB platinum rated also?

I'd be in for at least 10...

The second PSU will trip in overcurrent protection if the load is too high for it, you'll have to reset the board (off/on).

same question as above!

does it work with other dpsxx00bb psu's?

do the load balance between them? or do you make some electronic modifications to the psu's
from what i know there is always a imbalance or something like that

The PSUs are load balanced, like when they are in the chassis of the server.
And it should work with the DPS1600BB and DPS2500BB, but I'm not sure about the voltage adjust on those ones.
I have a few 2500BB to check.

[Tupsu]

I've been working on something since april or may, it evolved with the S5+, and another time with the announcement of the S7.

Since pictures may speak better than words, here are some first shots of the prototype:





Tech specifications:

4 layers of copper, 2oz on each layer
4000w output with 2x DPS-2000 BB.
30x PCI-E connectors
On/off switch
Optional adjustable output voltage from 12v to 13.7v on the older DPS-2000 BB PSUs
Optional voltmeter if you want to adjust the output.

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.

I want order  4pcs

[fhh]

Want One for sure!
complete kit with cables fan holder and voltage regulation.
Maybe a second one

Edit
find a solution to lower voltage would be fantastic

[sidehack]

I'm working on an undervolt solution, should have prototypes this month.

I'm completely out of stock on DPS2K boards, but can get PSUs reasonable if he doesn't have a lot of stock. Pretty smexy setup, J4bberwork. The fan plate is an especially good idea.

[J4bberwock]

I'm working on an undervolt solution, should have prototypes this month.

I'm completely out of stock on DPS2K boards, but can get PSUs reasonable if he doesn't have a lot of stock. Pretty smexy setup, J4bberwork. The fan plate is an especially good idea.

Thanks for the comments.
If the PSU allows it, having a -0.2 to -1.2v sent to the A1 or A2 pins (12v sense) should allow 10.5-12v regulation.


To explain to people who are curious to know how it works, some PSUs are "sensing" the voltage drop as close to the delivery point as possible.
Usually, it's a voltage drop because of the length (resistance) of tracks/wires, and the amount of current drawn.
The PSU adjusts the output voltage to compensate and sense +12v at the delivery point.

Some PSUs circuits are made in a way that only voltage drop are compensated, since in normal operation the voltage can't rise across the wires/tracks.
Some other will still respond to a voltage rise, and will drop the output voltage accordingly.

What we are doing is tricking the PSU so it believes that the voltage at the delivery point is lower than expected. The response for the PSU is to send higher voltage to compensate.
There is still an overvoltage protection, usually around 14.0v, and also and undervoltage protection.
Some PSUs will allow down to +9v output, some others will stop just below +12v.