[ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING***

[tom99]

EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!

Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more?

For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink.

  you need to have fan cool down newer Hboards and it can burn out chips that why some people hboard got shut off by board get very hot.

[Soros Shorts]

Does the backside of the regulator even get hot?

Very. I've put copper heatsinks behind the regulators - not directly because that space is blocked by other components. The heastsinks do get burning hot.

[davecoin]

We are a couple days yet from getting our 16 chip boards with the trimmer on the board.  I have some 8 chip boards that are an experimental OC board that use the same trim pot and I want to set the stage for how this will work.

In order to use this trimmer, you *must* have a multimeter and know how to measure resistance.  If you don't know what I'm talking about, you aren't ready to try to OC your boards.

An easy place to take resistance measurements is to get ground off the M-board GND terminal (where you would connect direct 12V cables - the terminal screws).  The red probe would go on the top metal contact of the Pulse inductor, which is the large bulky component on the H-card.  Be sure not to also touch the caps that are nearby or you won't get a correct voltage.

While measuring the voltage, use your super-micro tweaker phillips screwdriver to *slowly* turn the trimmer clockwise for higher voltage or counter-clockwise for lower.  The trimmer has an effective range of about 180-degrees.  If you turn it down too far, you will see voltage begin to rise again. 

Don't make voltage changes quickly.  If you go higher than about .895v you better know what you are doing or you will kill your chips.  I don't even know what voltages people are getting away with on these boards.  Find a guide or post before you start mucking around.  Overclocking *will* reduce the reliability of the boards.

Does this confirm you will indeed be shipping before the end of October? The 31st is next Thursday.

[CryptoCluster]

EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!

Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more?

For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink.

Yes, it gets quite hot. I believe they are also constructed do dissipate the heat to the board, but I did not do any research in that matter.
In my opinion the regulator heatsink is much more important than chip heatsinks.

[Xian01]

Well poop... Doesn't look like we'll be hashing by Halloween with October orders

[klondike_bar]

EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!

Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more?

For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink.

Yes, it gets quite hot. I believe they are also constructed do dissipate the heat to the board, but I did not do any research in that matter.
In my opinion the regulator heatsink is much more important than chip heatsinks.

i would guess that the regulator is half the size of a chip, but emits 3-4x the heat of a chip

[buzzdave]

I want to clarify - we are not selling these 8 chip boards - no idea if we will be any time soon.

We are going to be able to ship some of the earlier queue October rig orders, but at this point I don't see us getting everything out before end of the month.  Assembling first rigs today & through the weekend for Monday shipping.  We just don't have enough product yet to do mass shipping.

I'll keep you posted on when the first big shipments go out from the factory to us.

The trim pots on the cards should be factory set to a safe level, but I've measured some differences from one board to the next.  I doubt the values could change due to shipping - you'll understand when you see how tiny the trimmer is.  Just cranking the thing to max voltage does not necessary produce more output - its careful tuning that will yield the best results.

Best,
Dave

[buzzdave]

***January Chip Prices Released***

I've been authorized to offer bulk chips by the reel (3000 pcs) for $5/chip.  If you rate the chip at even 2GH/s this is only $2.50/GHs!

We are not taking deposits for these - this is an up-front payment required, no-cancel, no-return terms of sale.

Chips will be delivered in January 2014.

Cheers,
Dave

[Tsunamirain]

Only test wafers so far from global foundries I don't see cointerra shipping for December either..
I'm at the plant in Malta NY every day..

[AMD FTW]

***January Chip Prices Released***

I've been authorized to offer bulk chips by the reel (3000 pcs) for $5/chip.  If you rate the chip at even 2GH/s this is only $2.50/GHs!

We are not taking deposits for these - this is an up-front payment required, no-cancel, no-return terms of sale.

Chips will be delivered in January 2014.

Cheers,
Dave

Dave can you be a bit more precise as to when in January, as this would make a decision easier.

[mb300sd]

We are a couple days yet from getting our 16 chip boards with the trimmer on the board.  I have some 8 chip boards that are an experimental OC board that use the same trim pot and I want to set the stage for how this will work.

In order to use this trimmer, you *must* have a multimeter and know how to measure resistance.  If you don't know what I'm talking about, you aren't ready to try to OC your boards.

An easy place to take resistance measurements is to get ground off the M-board GND terminal (where you would connect direct 12V cables - the terminal screws).  The red probe would go on the top metal contact of the Pulse inductor, which is the large bulky component on the H-card.  Be sure not to also touch the caps that are nearby or you won't get a correct voltage.

While measuring the voltage, use your super-micro tweaker phillips screwdriver to *slowly* turn the trimmer clockwise for higher voltage or counter-clockwise for lower.  The trimmer has an effective range of about 180-degrees.  If you turn it down too far, you will see voltage begin to rise again. 

Don't make voltage changes quickly.  If you go higher than about .895v you better know what you are doing or you will kill your chips.  I don't even know what voltages people are getting away with on these boards.  Find a guide or post before you start mucking around.  Overclocking *will* reduce the reliability of the boards.

nice to see you guys selling 8 chips boards. FYI, for the one I made (https://bitcointalk.org/index.php?topic=228677.msg3259455#msg3259455), I'm running around 0.9v and pulling 21-22GH and ~23W. been too lazy to try higher voltage.

do i see oshpark boards? I've been placing quite a few orders there lately

yup, they are pretty convenient and relatively cheap

Would you be willing to sell that board on their market? I might be interested in a couple.

[kaerf]

We are a couple days yet from getting our 16 chip boards with the trimmer on the board.  I have some 8 chip boards that are an experimental OC board that use the same trim pot and I want to set the stage for how this will work.

In order to use this trimmer, you *must* have a multimeter and know how to measure resistance.  If you don't know what I'm talking about, you aren't ready to try to OC your boards.

An easy place to take resistance measurements is to get ground off the M-board GND terminal (where you would connect direct 12V cables - the terminal screws).  The red probe would go on the top metal contact of the Pulse inductor, which is the large bulky component on the H-card.  Be sure not to also touch the caps that are nearby or you won't get a correct voltage.

While measuring the voltage, use your super-micro tweaker phillips screwdriver to *slowly* turn the trimmer clockwise for higher voltage or counter-clockwise for lower.  The trimmer has an effective range of about 180-degrees.  If you turn it down too far, you will see voltage begin to rise again. 

Don't make voltage changes quickly.  If you go higher than about .895v you better know what you are doing or you will kill your chips.  I don't even know what voltages people are getting away with on these boards.  Find a guide or post before you start mucking around.  Overclocking *will* reduce the reliability of the boards.

nice to see you guys selling 8 chips boards. FYI, for the one I made (https://bitcointalk.org/index.php?topic=228677.msg3259455#msg3259455), I'm running around 0.9v and pulling 21-22GH and ~23W. been too lazy to try higher voltage.

do i see oshpark boards? I've been placing quite a few orders there lately

yup, they are pretty convenient and relatively cheap

Would you be willing to sell that board on their market? I might be interested in a couple.

Here are the design files...

board and schematics
https://mega.co.nz/#!89gQkSwD!MDH1iXvlsSogk3XUIjjuVDP_EW9drPgCeogcdzwCI7U
gerbers
https://mega.co.nz/#!Yoh1yJoa!NhdcoRqV7qH9TwMq5V15SyC5O4wbv8cByE6ItZLHGc0
stencil
https://mega.co.nz/#!I44VjQAb!YYo9-EVSZiuvPcBu8-wBUAmlGm0DTr0T8nDBGYf9lNY

Even though these work for me I'd still recommend you review them before use...I'm not an EE, but it was fairly straightforward to redraw the 8chip board. It was a quick job, so there are extra holes and the component names are not sequential. The nice thing that i added was holes for a standard chip set heatsink (59 mm diag spacing)

[blackarrow]

I've been authorized to offer bulk chips by the reel (3000 pcs) for $5/chip.  If you rate the chip at even 2GH/s this is only $2.50/GHs!

As promised to our customers, we will beat this offer and adjust our prices accordingly.

[Bicknellski]

I've been authorized to offer bulk chips by the reel (3000 pcs) for $5/chip.  If you rate the chip at even 2GH/s this is only $2.50/GHs!

As promised to our customers, we will beat this offer and adjust our prices accordingly.

Nice... polite price war... sweet.

[goxed]

EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!

Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more?

For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink.

Yes, it gets quite hot. I believe they are also constructed do dissipate the heat to the board, but I did not do any research in that matter.
In my opinion the regulator heatsink is much more important than chip heatsinks.

+1, the most important task before serious overvolting of the h-boards (0.8V+) is to first stick heatsinks on the back side of the board under the regulator. If possible, stick a heatsink on top of the regulator and the inductor. This way you can take them as high as 1V. The board will dissipate close to 70Watts at 1V.

[jimrome]

EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!

Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more?

For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink.

Yes, it gets quite hot. I believe they are also constructed do dissipate the heat to the board, but I did not do any research in that matter.
In my opinion the regulator heatsink is much more important than chip heatsinks.

+1, the most important task before serious overvolting of the h-boards (0.8V+) is to first stick heatsinks on the back side of the board under the regulator. If possible, stick a heatsink on top of the regulator and the inductor. This way you can take them as high as 1V. The board will dissipate close to 70Watts at 1V.

If you're seriously at the point where you're heatsinking the coil, I'd suggest just getting a part with a higher saturation current as there are pin/footpring-compatible replacements in the same series. This version has  sat. current of 55A: http://www.digikey.ca/product-detail/en/PA0513.441NLT/553-2076-1-ND/3687452. FYI the stock part is a PA0513.441NLT which has a sat. current of 35A.

I don't know what other impacts this would have on the performance of the regulator, so don't try this unless you're willing to experiment.

[Keefe]

EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!

Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more?

For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink.

Yes, it gets quite hot. I believe they are also constructed do dissipate the heat to the board, but I did not do any research in that matter.
In my opinion the regulator heatsink is much more important than chip heatsinks.

+1, the most important task before serious overvolting of the h-boards (0.8V+) is to first stick heatsinks on the back side of the board under the regulator. If possible, stick a heatsink on top of the regulator and the inductor. This way you can take them as high as 1V. The board will dissipate close to 70Watts at 1V.

Can you recommend a source for suitable heatsinks?

[tom99]

EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!

Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more?

For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink.

Yes, it gets quite hot. I believe they are also constructed do dissipate the heat to the board, but I did not do any research in that matter.
In my opinion the regulator heatsink is much more important than chip heatsinks.

+1, the most important task before serious overvolting of the h-boards (0.8V+) is to first stick heatsinks on the back side of the board under the regulator. If possible, stick a heatsink on top of the regulator and the inductor. This way you can take them as high as 1V. The board will dissipate close to 70Watts at 1V.

Can you recommend a source for suitable heatsinks?

   maybe you like this heatsink but some said it's too tall http://www.ebay.com/itm/100x140x12-7mm-Aluminum-Heatsink-for-Electronic-Computer-Electric-equipment-H157-/181110341808?ssPageName=ADME:L:OC:CA:3160

[Keefe]

It's putting a heatsink on the back of the voltage regulator that looks like a challenge because of the components around it. Has anyone succeeded with that?

[klondike_bar]

EDIT: I have heatsinks on back of all boards in regulator area, and 120 CFM fans!

Does the backside of the regulator even get hot? I have felt the top of the chip and its very hot but I don't feel much on the backside. Wouldn't putting a small heatsink on the chip do more?

For the hashing chips those thermal vias work well as even touching the vias themselves gets hot, even better with a heatsink.

Yes, it gets quite hot. I believe they are also constructed do dissipate the heat to the board, but I did not do any research in that matter.
In my opinion the regulator heatsink is much more important than chip heatsinks.

+1, the most important task before serious overvolting of the h-boards (0.8V+) is to first stick heatsinks on the back side of the board under the regulator. If possible, stick a heatsink on top of the regulator and the inductor. This way you can take them as high as 1V. The board will dissipate close to 70Watts at 1V.

Can you recommend a source for suitable heatsinks?

   maybe you like this heatsink but some said it's too tall http://www.ebay.com/itm/100x140x12-7mm-Aluminum-Heatsink-for-Electronic-Computer-Electric-equipment-H157-/181110341808?ssPageName=ADME:L:OC:CA:3160

i would beleive that you cant fill every slot on the board if using a heatsink taller than 8-10mm. i have some 35x35x6mm heatsinks on mine that easily allow airflow between every slot