Bitfury chip integration

[HyperMega]

So 13 USD per chip for 50 GHs, way to expensive for production
For engineering it is OK

That's the price of the efficiency! The chip performance is low.

I guess they will sell the chip with respect to the nominal speed of 100 GH/s for $13. But at this operation point you will not have 0.06 J/GH.
According to their press release it should be approximately 0.12 J/GH instead.
Anyway, this would still be a good price.

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[dogie]

I guess they will sell the chip with respect to the nominal speed of 100 GH/s for $13. But at this operation point you will not have 0.06 J/GH.

Yeah my interpretation is its more of a headline efficiency which could be used in the second half of this gen (like S4/S4+).

Anyway, this would still be a good price.

$0.13/GH certainly isn't terrible when you consider how cheap their reference design is to make and should allow the OEMs to get by at least for now.

[el_rlee]

I guess they will sell the chip with respect to the nominal speed of 100 GH/s for $13. But at this operation point you will not have 0.06 J/GH.

Yeah my interpretation is its more of a headline efficiency which could be used in the second half of this gen (like S4/S4+).

Anyway, this would still be a good price.

$0.13/GH certainly isn't terrible when you consider how cheap their reference design is to make and should allow the OEMs to get by at least for now.

Have you got information regarding the reference design or are you just guessing?

[dogie]

I guess they will sell the chip with respect to the nominal speed of 100 GH/s for $13. But at this operation point you will not have 0.06 J/GH.

Yeah my interpretation is its more of a headline efficiency which could be used in the second half of this gen (like S4/S4+).

Anyway, this would still be a good price.

$0.13/GH certainly isn't terrible when you consider how cheap their reference design is to make and should allow the OEMs to get by at least for now.

Have you got information regarding the reference design or are you just guessing?

Look at previous boards and the board in the test - they're almost bare.

[el_rlee]

Look at previous boards and the board in the test - they're almost bare.

Are there reference designs or public information regarding any other than the 55nm bitfury generation?  It would be a waste not to put a heatsink on that chip - or immersion cool it, like they do themselfs.

[Mitak]

For 100+ GHs per chip you'll need a heat sink
From the info already in the open air I'm planning to do string design , but kind of a hybrid with DC/DC group just to play with the Voltage
There is no chip specs yet .
A lot of open questions like  Chaining of SPC ...

[el_rlee]

For 100+ GHs per chip you'll need a heat sink
From the info already in the open air I'm planning to do string design , but kind of a hybrid with DC/DC group just to play with the Voltage
There is no chip specs yet .
A lot of open questions like  Chaining of SPC ...

I think we can trust that the chip is tailored for a string design.

Are there no seperate VDDio and VSSio pins?

[dogie]

Look at previous boards and the board in the test - they're almost bare.

Are there reference designs or public information regarding any other than the 55nm bitfury generation?  It would be a waste not to put a heatsink on that chip - or immersion cool it, like they do themselfs.

AFAIK no ones even benchmarked a 28nm chip in the wild, every machine must have been sold under a solid NDA or mandatory purchase order. Its pretty crazy if you think about it, 1000s and 1000s of BF3500s and BF4500s and not one has ever been 'tested'.

[QuintLeo]

Weren't the BF3500 and BF4500 based on one of their 55nm designs?

[el_rlee]

Weren't the BF3500 and BF4500 based on one of their 55nm designs?

Yeah, I think so. And there have been some "out in the wild"

[Mitak]

For 100+ GHs per chip you'll need a heat sink
From the info already in the open air I'm planning to do string design , but kind of a hybrid with DC/DC group just to play with the Voltage
There is no chip specs yet .
A lot of open questions like  Chaining of SPC ...

I think we can trust that the chip is tailored for a string design.

Are there no seperate VDDio and VSSio pins?

NDA

[Biodom]

So you have to lay down a $1M order on the chips sight-unseen in order to get information about the chips? Either that's not correct or that's powerfully stupid.

"punin"/bitfury is saying that he will have smaller batches on "my site" without mentioning what "my site" is.
probably just bitfury's main site.
He also says that they currently have 98 chips (had 100, burned two by going to 180 Gh/s in immersion!).
Mass production-most likely late March-April (without overpay for a "hot lot").
Engineering schemes delivery in late Feb to those who pay now.

[el_rlee]

Probably www.bitfurystrikesback.com/