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341  Bitcoin / Group buys / Re: Unofficial USB adapters for ASICMiner Tube/Prisma on: June 05, 2015, 04:34:38 PM
Still have a few of these if people are interested.


Could use 2 or 3.
or a part # for the 3 pin connectors and the thru hole plugs.
342  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: June 05, 2015, 03:31:58 AM
0.32W/GH is damned impressive/amazing.

Fricking incredible.
343  Bitcoin / Pools / Re: BITMAIN announces Antpool on: June 01, 2015, 02:53:50 PM
no payout here either.. kind of sucks because i need to buy something and im that much short..

No payout here either.
Wassup Bitmain?

Pool has had some outages (>1 hour) over the last 2 days here in US.
Downtime = Lost revenue.
Not a good thing.

Date/Time stamp on Payout @ Bitmain is 05-31-2015 @ 18:09 CST.
Date/Time stamp @ Coinbase is 06-01-2015 @ 2:00 CST

~8 hours to make it through the net?
Are they running on a 300 baud dial-up modem?
When I buy H/W the BTC transfer never takes more than .5 hours.

"Things that make you go Hmmmmmmm."
344  Bitcoin / Pools / Re: BITMAIN announces Antpool on: June 01, 2015, 05:39:24 AM
no payout here either.. kind of sucks because i need to buy something and im that much short..

No payout here either.
Wassup Bitmain?

Pool has had some outages (>1 hour) over the last 2 days here in US.
Downtime = Lost revenue.
Not a good thing.
345  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: May 18, 2015, 08:12:35 PM
As soon as people stop asking that question.

"Are we there yet?"  Huh
346  Economy / Computer hardware / Re: [WTS] Custom server PSU breakout boards. DPS-2000 BB, HP 1200 and 1300w. 2880w on: May 18, 2015, 12:57:53 PM
Back from holidays with a quick update:

New design boards with PCI-E plugs instead of screw terminals  have been sold for the last 3 months, I'll take some pictures of them to update the first post.
The following boards are concerned:
DL580 G3 STD (8 PCI-E plugs)
Common Slot STD (8 PCI-E plugs)
DPS2000 BB XL (12 PCI_E plugs)

All the boards including the Bladecenter H 2880w are now in stock.

Double ended PCI-E cables are also available in 24" and 36" as well as custom length.

DL580 G3 XL is discontinued because of the lack of supply on the main connector
Common Slot XL was repleaced by a STD version with 8 PCI-E plugs (more than enough for 1200w)

A new board will also be released soon to allow those with faulty S4 PSUs to have something really close to stock size but with more power (at least 1600w) and that can be powered from 110v.
The product reached its final steps: design of the enclosure that will be attached in place of the original PSU.

Do you have the DPS2000 BB XL (12 PCI_E plugs) in stock?
UPS Shipping cost of 1-6 boards to Longville, MN USA 56655 ?

Thanks,, LLC
Jeff Schlenker, CEO
1199 State Hwy 200 NE
Longville, MN USA 56655
347  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: May 18, 2015, 12:31:36 PM
My first choice would be on a mountain in Wyoming, but I was just this evening discussing Alaska with some folks.

Also, I definitely did no real work this weekend. I mean I finally fixed the windows in my Jeep, but I didn't really work on miners at all. Tomorrow I may do some more testing on noise limits or something on the Compac, and work on the L-board for two-chip base Amita testing. Or I might just sit around and talk about awesome stuff with Novak all day. Who knows.

15+ years ago was considering the same (Alaska Wyoming). Ruled out Alaska as there are advantages to being in CONUS. Wyoming was beautiful, just couldn't seem to find the right chunk of ground. Settled on Northern MN. Good compromise. Brutal winters, pleasant summers, great fishing and hunting, land was less expensive, reasonable distance to VA medical facilities, UPS hub is 42 miles away, etc.

Don't think you need to apologize for taking a weekend off, not like your under contract with a delivery date cast in concrete. But appreciate the update.
348  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: May 08, 2015, 06:05:39 AM

Our human heating systems are a 3 loop system with a small (3-5 gal) expansion tank operating at 1 bar +5psi/-0psi gauge. Basically the system runs at atmospheric pressure with the +5psi in the system plumbing being caused by fluidic resistance in the plumbing. One loop continuously circulates fluid thru the miner(s)/immersion tank contributing heat to the expansion tank. The second loop pump is driven by a room thermostat (on/off) i.e. it runs when the thermostat demands heat and flows heated fluid into the PEX in the floor or into a heating coil mounted in the plenum of a forced air furnace when the fan in running, and the third loop pump is driven by an adjustable temp sensor on the tank which circulates fluid thru PEX buried outside the building (we like to put it underneath the driveway and sidewalks to minimize snow shoveling in the winter, one could use it to preheat the water in a hot tub also). Typically the system is sized @ 1/8 BTU capacity of an identical system with a restive element boiler. This sizing minimizes the third loop pump operation. All the pumps are "run of the mill" hydronic heating system circulators. At the high point in the system we install a automatic "burper". All PEX in the system is of the oxygen diffusion barrier type (this minimizes rust contamination/creation from cast iron pumps, fittings etc.). A safety sensor on the expansion tank will disrupt the power to the miner(s) if tank temperature becomes excessive. The system is tweaked to maintain a ~40C expansion tank temperature with the automatically resetting high limit miner shutdown set at ~60C. Careful attention is paid to tubing sizing to minimize fluidic resistance and maximize flow rates for optimal heat transfer in all zones of the system. Because we operate the system a lower temperature and pressure than a typical restive element heated system the system typically needs larger sized piping/tubing to transfer the heat quantity desired. Oh yeah and the fluid is a 50/50 mixture of distilled water and green antifreeze.

It's amazing how few miners it actually takes to heat a structure. One of the installations has 16 manifolded C1's heating the slab floor of a reasonably well insulated 40'x30' pole barn.

Well enough of this off topic rant.

Can't wait to get my hands on one of your boards.
349  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: May 08, 2015, 05:08:48 AM
A well-designed miner will run with an input voltage below 12V. Depends on the topology, but the Spec1 should be designed to work off a Vin probably 8V or so. Spec2 may not, since its power requirements are different. A buck regulator also works more efficiently with a smaller Vin-Vout difference so running at a lower Vin is actually better (to a point; reduced Vin means increased Iin which can cause increased wire losses). For a well-designed miner.

the question is, how many designers worked out that the system may be running a lower voltage then the 12v out of the PCIe power plugs?
some how i don't thing my miners will be happy with less then 11v.. i have no variable voltage supply to test though.. i could rig up 7v out of my PSU with some random PCIe plug i cut off a dead psu :-?

unless you know a simple voltage dropper that could handle many amps, and be able to be slapped together on a breadboard?

none the less, a simple mosfet and resistor (well you know what i mean, get it form 12v to 5v/3.3v/1.2v/etc.) is cheap enough to keep 12v "clean" without spending another $5-10/per Vin on components to step up/down the voltage in.

come to think of it, im going to tare down the old "new r-box" and poke'n'prod them voltage lines, and maybe throw a rs232 input on the chips tx lines. (watch me let out that blue magic smoke on something), i really want to see where its failure point is (bad solder on one chip?).. also i want to get messy with all that white ceramic thermal compound... i ment, *ehem*

AJRGale - Many of the server PSU's have a Vout adjustment and can easily be tweaked +- 1V and probably a lot more than that depending on the particular supply in question.

Most of the buck converters I've worked with want at least a Vin = Vout + .8V with a more typical minimum of Vin = Vout + 1.2V.
This is where SEPIC (Single-ended primary-inductor converter) and/or CUK converters come into their own with a wider Vin range at the expense of component count and circuit complexity. Where Vin can be either above or below Vout within an acceptable design range. Typically, these converters (DC-DC) have a practical maximum current design limit owing to massiveness of the inductors at high current outputs.

Several of the chip manufacturers have single chip SEPIC/CUK controllers on the market. But they still require a butt load of external power components. Linear, Fairchild, and TI to name but a few.

350  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: May 08, 2015, 04:35:25 AM
Almost all of your questions have been asked and answered more than once already. Most of them are addressed in the first post.

The chip I'm looking over for the TypeZero power systems should take in over 12V easily. Limitations might come from accessory components (management rail power, input capacitors, etc) but I'll probably make it work off at least 16V safely.

Also, the S5 has 30 chips not 32. And with software-adjustable clocking, you don't have to take the machine apart and put it back together to make changes, which is probably good for an industrial or immersion install.

16V Jap Caps with a low ESR. Good stuff maynard.

Ya' know I looked at a S5 miner stats page as I was writing that post and saw 32. Just went back and looked at the same page still open in my browser and sure as Sh*% it indicates 30 chips. Must be going senile.

Ya' got a point on the remote S/W adjustment, although once corn-figured it'll likely never get changed.
One of the beauties of immersion cooling is the ability to R&R components while the rest of the machine is up and running. Hence the inquiry for edge card connectors. Hot swappable hash boards/PSU's.
You're spot on about bucks liking a narrow Vin-Vout. Why I'm always amazed that many of the server PSU's we use run more efficiently off of 240VAC than 120VAC.
351  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: May 07, 2015, 10:55:18 PM
Dev's gonna depend on feature set. Right now we're looking to refit the Prisma formfactor with a 30-chip board that'll be software clock and voltable. The primary goal is the Spec1 board to fit on S1 chassis, but once that design is done it won't take much to extend it to the Spec2 Prisma refit board. If you want higher density I can probably work on condensing it with more chips per node and a higher current power system. The easiest thing will be a straight string topology, but for your needs the ability to alter the operating points (core voltage and clock) could be worked into an adjustable thermostat.

I do like the idea of a miner-based heating system.

At the hash board level, clock & volt adjustment is about all I need.
Hell, jumpers or dip switches would work for me to set clock and CoreV.
Call me old fashioned but I like dip switches I can look at versus S/W.
What else can one do at the hash board level?

How close to having proto boards made for the Spec1 are you?
BTW, I got a dozen S1's that are turned off right now. Will be interested in 24 Spec1's.
What'ca figure the hash rate and power consumption will be on the Spec1's?
The Spec1's would be easily waterblockable (is that even a word?) with the waterblocks from syscooling, me thinks.

So the Spec2 will be similar to the S5 hash board (32 chips) with a Prisma formfactor and a USB interface?
Guessing the Spec2 board will draw ~240W @ 350MHz clock?

Do the DC-DC's you're thinking about using take a higher Vin than 12.2Vdc?
Just thinking that if the DC-DC's would live with a Vin range of 12.2 to 15.0 one could run them off a 12V lead-acid cell.

Hey has anybody out there tried running a miner straight off a 12V deep cycle or car battery (@ 12.75V) ?

Dinner time, l8r folks.
352  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: May 07, 2015, 08:35:51 PM
One issue with a board-cooled string design is that each node in the string is at a different ground potential. If there's any short through the heatsink from the ground plane of one node to another, the best case is your PSU trips out and the worst case is stuff catches on fire.
For an anecdotal reliability comparison, the Prisma used board-cooled string and the S5 uses top-cooled string. Not many S5 catch on fire. As much as it'd be easier to manufacture and probably easier to install, I don't like the idea of a board-cooled string because it also makes it easier to fail.

I was thinking of mentioning to you that we're looking into a Prisma refit board with the BM1384 - same size and stock power level. I know you were playing with immersion cooling on those several months ago.

Socketing seems to be an unlikely way to go. Given that (with the exception of BitFury R1 and R2 chips) nobody has ever made a pin-compatible next-gen chip, given that sockets for the fairly customized footprint may not exist, given that if they do (or can) exist they'll cost more than the chips themselves and the chips themselves would cost more than the PCB and every other part on it, it's probably not feasible.

My primary interest is still to build things geared toward individual miners. If one of the big guys building industrial stuff wants to repurpose for immersion cooling, that's fine. But unless the big guy specifically commissions a board design and pays all the dev costs, I'm probably not going to do anything specifically for his benefit.

For waterblocks, we've had good luck using the MX-4 thermal compound as it is electrically inert and has a thermal transfer co-efficient 6-8 times that of Arctic Silver.

Now you have me drooling over a Prisma 1.0/2.0 refit board. And we would be VERY interested in a board like that that didn't use a pre-historic propriety controller.

Yeah that's what I anticipated you'd say about socketing. Don't know till you ask.

Just outta' curiosity, guestimate - ball park - off the top of your head - a number I can't/won't hold you too, the design/dev cost of a high density Prisma style board using the BM1384's with edge card connectors and a matching backplane with DPS-2000 style PSU connectors. Dimensionality is unimportant as we can build a tank around anything. Don't spend a ton of time on this just curious how many zeros are to the left of the decimal point a design like that would have.

We had/have 3 installations of "solid state" hot water boilers operating for comfort heating (at a profit) all this last winter in and around my local area in northern MN. All in all, an extremely successful test/prototyping and are working on a final design. Over designed one installation to the point that when it was -20F they had windows open dissipating the excess heat with everybody in tee-shirts.

Again, before I spent too much time doing board design I'd want some kind of a commitment from Bitmain for chip supply. Or maybe a licensing agreement to manufacture chips . . . . .
Just sayin'

353  Bitcoin / Hardware / Re: GekkoScience BM1384 Project Development Discussion on: May 07, 2015, 04:15:33 PM
And I'm really hoping we'll be able to get chips from Bitmain to make S1 refit boards or y'alls money  is approximately going to waste.

If we can't get chips from them, though, we'll figure something else out. Hopefully. This project is too good to throw away.

Been outta' the loop for awhile, long time no talk.
I hope you have better luck getting chips outta' Bitmain.
We've wanted to buy some for quite a while for a similar project (high chip density board for immersion cooling) but Bitmain never seems to want to release/sell them in quantity.
Like you (and others) we were hoping that the BE300 would come to fruition. Alas I fear that's not going to be the case in the near term.

In our immersion cooling world, a high hashing-chip density board consuming 1Kw-2Kw with edge card connectors mating to a backplane for power and USB interface, designed to dissipate the heat through the pad with all the components on the opposite side would be PRIMO. A design like that would lend itself to air (heatsink) or waterblock cooling solutions as well. If the backplane had an appropriate number of connectors like your DPS-2000 adapter one could keep the power and ground planes short and thick.

Another concept might be to socket the hash chips assuming that the BM1384 and BM1386 remain pin compatible.

Anyway, you'se guys are the brilliant ones and I'm sure whatever you come up with will be fricking amazing.

BTW, I have contacts inside 3M that may be able to apply a little external corporate pressure to prod Bitmain to release/sell chips to a board manufacturer that makes an immersion coolable board cuz' 3M, obviously, wants to sell their Novec engineered fluids, adhesives, and sealants. Let me know if I should make a couple of calls to "grease the wheels of motion".
354  Bitcoin / Mining software (miners) / Re: M's Miner (Ant/SP) Monitor v4.7: alerts,auto/mass/scheduled reboot/fast on: February 13, 2015, 05:01:08 PM

FYI, Last couple of days has been "Under Construction".

Maybe I missed something in the thread about changing hosting.

Inquiring minds wanna' know.

Thanks for all you do.
355  Bitcoin / Hardware / Re: ANTMINER S4 Discussion and Support Thread on: November 23, 2014, 04:46:41 AM
We have Qty 48 $400 off coupons for Bitmain S4's expiring on 2014-11-30 22:18:00 that we will probably not use.
Anybody interested in these should email
We would like to sell these coupons for .25 BTC each.

Best regards,
356  Bitcoin / Group buys / Re: [CLOSED] ASICMiner Prisma 1.4th/s - 1.47 BTC on: November 17, 2014, 11:03:38 PM
I have the best single psu you can get to runs this (money no object)  the evga 1600 watt platinum psu.

Thoughts are this you need to be a little more advanced to use this then an s-3.
It is loud.
For now I will not run this if I am not at home  as my mining area can't quite be made fire resistant.

If you can set this in an outside building  with proper cooling it is pretty nice.
You avoid the sound problems.
You avoid the burn up risk .

If you are an apartment person this is a no go.

In the PC power supply arena I absolutely concur. The EVGA's are Top Notch.
However, what we feel is a more more cost effective solution follows:

Connected to this adapter Gekko Science Sells ( )

Bottom side view:

What the look like wired up and running:

But this is what we call a "Desktop Computer".

8 6 core AMD's (48 cores), 64G memory, Dual nVidia Quadro's w/1.5G each, . . .

These are 1800W supplies (147.5A * 12.2V) They have adjustable OCP (Over Current Protection) and adjustable output voltage, in addition to all the "bells 'N' whistles" the Gekko Science adapter brings to the table.
We have paid anywhere between $18.75 -$25 each, the Gekko Science adapter sells for $60.
We make our own PCIe cables, although Gekko Science sells 3' cables for, if memory serves, $3.75 each.
The fans we scarfed in the salvage market which flow 24 CFM each and are required to run these supplies outside the IBM Blade Center enclosures they were designed to be in.
I believe Gekko Science offers fans for these supplies but don't know their cost.
So assuming one purchased the cables from Gekko (8 * 3.75) for $30, the total cost of this supply is ~$115

Just a thought.
357  Bitcoin / Group buys / Re: [CLOSED] ASICMiner Prisma 1.4th/s - 1.47 BTC on: November 16, 2014, 04:48:36 PM
 I will do some other clocks freq 190   and freq  260.   I would like to be able to leave this alone and feel pretty safe when I travel then pump it up to an oc when I am home.

  I can keep this piece cool  when I am home so an oc of 250 or 260  with my current setup seems okay.

 When I leave the house I will try to find a dc I feel safe about.

The temps rose from 80 f to 105 f with the garage door shut.
The watts rose from 998 to 1045 with the garage door shut.
Clock at freq 200.  I don't quite feel safe about this.

If freq 190 does the trick for unattended I will be happy.
If freq 260 works while I am in house I will be happy.
More testing to come.

I'd get that thing away from anything combustible, whether you're home or not.
If it blows a gasket, you run the risk (whether you're home or not) of lighting all that nice kindling that surrounds it.
In contrast, if that S3 fries crispy, the ignition source stays inside it's case and likely would just be a smoke bomb.

Blocking that square hole in the back also helps force all the air across the heat sinks.
I used aluminum foal tape (not cloth, fiberglass, or plastic duct tape). As in my previous pics. Cheap at the hardware store.

Remember 70% of the heat is dissipated by the heat sinks (internal), and the remaining 30% is dissipated from the visible components and board.
Assuming you're clocked @ 200 and drawing ~1000W and assuming the power supply is 92% efficient.
The Prisma is dissipating 920 watts total.
That means 644 watts are being dissipated by the heat sinks (internal) and 276 watts are being dissipated component side.
BTU = watts * 3.15.

The downward facing hashing board is therefore dissipating 217.35 BTU (276W/4 * 3.15) continuously 24/7 into the wood shelf it's sitting on.

And is why we mount ours on metal racks vertically.
I betch'a the bottom board on your Prisma is running 2x-3x hotter than the other 3 (top and sides).

Just sayin'.
358  Bitcoin / Group buys / Re: [CLOSED] ASICMiner Prisma 1.4th/s - 1.47 BTC on: November 16, 2014, 04:18:08 PM

I have an electricians clamp meter I got at Lowes that works well.  If you have access to one side of your 240V feed, just measure the amps and multiply

times voltage measured with an ohmmeter.  What I measured for some of my gear was 12A X 248V =2976W.  I measured this right at the circuit breaker.

Roger the P=I*E

Have a clamp-on for larger loads (100A+), she's not terribly accurate below 50A.
I'll check out the one at Lowes.

359  Bitcoin / Group buys / Re: [CLOSED] ASICMiner Prisma 1.4th/s - 1.47 BTC on: November 16, 2014, 02:33:58 PM

"My main reason for the first post was trying to figure if a 260 oc is better then a 200 uc."
Roger that, why we're doing testing at various different clock rates.
Think it's a forgone conclusion that H/W error rate will rise with increased clock speed.

There is a fine line balancing act between initial cost, cost of operation, and difficulty increases.
I'll stick my neck out here and say that any gear can post excellent W/GH/s if de-clocked enough.
Heck, look at what guys are doing with de-volting and de-clocking Bitmain S1's.
Problem with de-clocking is hash rate falls with it and given the network difficulty increases with reduced hash rates it may never pay for itself.

I would re-write your list with each line item carrying an equal weight to read:
1) initial cost ($/GH/s)
2) profit potential (W/GH/s)
3) reliability/dependability
4) heat + safety

Regarding reliability/dependability, the amount of effort required to cause a miner to restart mining (after say a power failure), and the length of time required between miner reboots.
The Bitmain S1's are the epitomy of dependability. Plug'em in, config'em, OC'em, and forget'em.

"I did find that my power went from 985-90 to 1033-1049 watts.  the meter jumps back and forth with the readings."
Your meter might be sensitive enough with a fast enough sample rate to be seeing the power fluctuations caused by varying power requirements during hashing.
"So temps may play a big part in power draw."
In our observation across many different machines, incoming air temp most definitely causes changes in power consumption.
As a rule-of-thumb, the warmer the air the more trons they use. Colder is cheaper.

"I keep getting the feeling this gear will need too much care to be safe."
Like much of the new releases of mining H/W, it takes the community/individuals a butt load of trial 'N' error to find the "sweet spot" for operating parameters.
I think with the kind of chip densities the Prisma has this "sweet spot" will be harder to find.

At this juncture I'd like to give a "shout out" to friedcat for designing the Prisma, to AM for manufacturing it, to CG and Canary for selling them, and to gekkoscience for making the adapters boards that power these units.
All of the above are "pushing the envelope" in search of better, more profitable, cheaper mining technology.
Thanks Guys, couldn't do it without you.

"For your farm with multiple units emmersion cooling may be best."
In bulk (16-32 hash boards/tank), immersion cooling makes sense.
On a "onesy-twosy" basis it drives the initial cost to the point of non-profitability.

360  Bitcoin / Group buys / Re: [CLOSED] ASICMiner Prisma 1.4th/s - 1.47 BTC on: November 16, 2014, 08:40:17 AM
OOPS on the previous post, just noticed your temps are in F not C.

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