Topic: DPS2000BB Breakouts. New updates! - page 3. (Read 6965 times)

Appreciated Phil!  I did not notice my neglect, I have been much too busy! 

Hope all is well!

-Optim

you can do about 9 cards with that psu.

it is a nice quality breakout board as are the cables.

All of these supplies are 220VAC in.

You can get a hold of them by contacting sales.

www.price-technology.com

where can i buy them and is 2K PSU and Breakout enough for GPU mining rig with 6 RX 480 s ?  also does this PSU s work on 220V power source. i'm new in GPU mining and sorry for stupid questions

Ah, I use this thread to post progress on projects.  Pricing is in the Marketplace section of the forums.

Breakouts:
2ks are $50 in singles
4ks are $65 in singles
2880 combo is $70 in singles

Cables:
I have cables and supplies as well. $3.50 per 6pin.  
8pins are backordered for the next 11 weeks but will be available if you're patient.

Supplies:
DPS2000BB is $50 in singles
2880 is $125-150 in singles (depends on market)

I am working out a few other designs for Q1 in this space.  Will update later.  I am also updating the website for pricing and actual product photos.  Much shooping at the moment.

-Optim

Did I miss pricing etc.? Your site just links to this topic lol

Yes.  There is stock of all products now.  Connectors came in early.  I have a completed batch of each, 2k, 4k, and 2880 combo.

Cheers
-Optim

Are these out yet?

I feel the love sidehack!  Hope yours is good as well.

-Optim

Must be nice to have a family close enough to work with. That's pretty cool. Glad y'all are doing stuff well.

It's a family.  I have been building and manufacturing with my pops.  We just both happen to be scientists/engnneers!  We are ma and pop, don't worry about that.

-Optim

Must be nice to have a team.

A slight update for everyone.

I have acquire a new 6-digit meter for power analysis.  To better gauge the efficiency of the 2kW breakout board, I measure the losses down to 6 significant figures.

Using the same test as the 2880W variant (https://bitcointalksearch.org/topic/ibm-bladecenter-2880w-breakout-1698582) I came up with the following numbers:

20.850mV drop return side
23.750mV drop +12V side

1900W load (158.3A).

These numbers were measured from the back of the output connector to the furthest PCI-e jack so margin is involved.

That gives a total drop of 44.600mV or by P=I*V, 7.060W.  That is about a 0.4% drop efficiency-wise.  Nice.

This was tested using the load stand below:

Load Stand:


With unit connected:


Cheers,
-Optim

Aye, good health all around. 

Okay  Stop fighting guys.

I have tested and used both products both are good.


The 4k and the 2k. From both sellers.

Optimizer's  are more expensive and are more beefy then j4bberwock.

He improved  the design,  but it costs more.

I do not want to get in to this and be a referee.

But  these boards from both builders can use the

 dps - 1600
 dps - 2000
 dps - 2500

both the 2k and the 4k  can do the psus above.

If you have two  dps -2500 psu's  running 2 s9's with a 4k board  the design from Optimizer is a better choice.

Why do I say this  here is why  2 s7's or 2  s9's  will pull about  2400 to 2800 watts.

If one psu fails which they do fail  1 dps 2500 psu left  will be able to run  the 2 s9's pretty long time maybe even indefinitely .

I did this test   and the result was optimizer and j4bberwock 4k boards both ran the two s9's but after a few days a few of j4bberwock's jacks near the connection to the psu darkened.

Now mind you  this is a good stress test as it is beyond the design of j4bberwock's 4k board.

his board is a 4k board not a 4.8k board.  But many of us use the dps 2500 psu since it is 91 or 92 % while the dps 2000 psu is 87 or 88% efficient .

Optimizer has his 4k designed to protect if a psu dies and he has more copper in the board  so you pay more.

Is it worth it? It most certainly is if you are running 2 s9s on one 4k board with dps 2500 psus.

@j4bberwock  you had the first 4k board I still use your board  along with some of your 2k boards.

Optimizer simply improved on your design.  Yeah he is now a rival  and we all would want to be like bitmaintech has been with the s9  no compertition  is nice.

To everyone reading.

 j4bberwock + Finksy have both been good to me

Optimizer has been good to me.

Optimizer has a beefier product that costs more then j4bberwock + Finksy product.

There is no question Optimizer has the better product and if price were equal choice would be easy  buy his.

Price is not equal so  I can show some cases where the cheaper product is practical.

I guess I need both camps to be mad at me to be fair and I want to be fair.

I can go back and show more then 1 photo of browne/melted j4bberwock boards and as of today I do not know of any photos of brown or melted optimizer boards.  

To be fair every j4bberwock board that I know of that browned or melted was on loads over 200 watts per jack. Or on the 4k board running 1 working dps 2500 psu not 2 .

@ j4bberwock

  I have had cataract surgery in both eyes.  
One at age 52 the other at age 55.
They work well for far.
They work well for medium.
They need reading glasses for close up.

I hope your eyes get better.

Well, I am glad you got your health back, but if you haven't had an issues, you may have not been paying attention.  How do you test your boards? 

I sourced online via HBC.

-Optim

This makes sense, got guys confused, I've used much of Jabber's hardware, without ever an issue.

Now that my health seems stabilized, even if my left eye is still almost useless at the moment, I can come back on a computer screen.

The funny thing, is that I can't remember getting a single message from you regarding your issues with my hardware.

My customers will probably confirm that I've always been open to any suggestion to improve my stuff.
Except for the past few month, obviously.

Ah, I was wondering when I would hear from you.  You may be slightly incorrect with the word replicated.  I tried some of those boards and they didn't work out for me.

I am a professional engineer by trade.  Necessity invented these boards when I starting seeing burnouts.



I designed these from the ground up using what I know so that I would have safe products to use.  Supplying to the community is necessary at this point.  The thermal characteristics are proof enough of this design taking nothing after yours.

I am always here if you have any questions,

-Optim

I believe that the fact you replicated the boards I designed in the first place is what caused takagari's confusion.