The feedback on our rev2 engineering chips has been positive so we're ready to go into sales of production chips. Our first production batch is rolling off the line as I write this. These are going to be TESTED CHIPS.
I should receive the first batch in the coming week, so be ready to grab some GH at amazing prices!! DIY FTW!
3.85GH/s already achieved, how much will you be able so squeeze out?
Topic: [ANN] Bitfury ASIC sales in EU and Europe - page 12. (Read 250509 times)
And one more +1
Delivered in just a bit over 24h - first test results here
Delivered in just a bit over 24h - first test results here
same here ... got DHL email ...
+1 quality service !
+1 quality service !
Another +1
I had a great interaction with their sales support team ;-)
-a[g
I just stop here to thx putin, really fast service, I bought 2.rev chip at 17:00 yesterday and got DHL email at 8:00 today.
same here ... got DHL email ...
+1 quality service !
+1 quality service !
I just stop here to thx putin, really fast service, I bought 2.rev chip at 17:00 yesterday and got DHL email at 8:00 today.
punin, do you have some spare m-board for older 1.2v h-cards?
my setup with 16 cards is unstable.
my setup with 16 cards is unstable.
Definitely want to see etches of the chip like over at http://zeptobars.ru/en/read/bitfury-bitcoin-mining-chip
maybe send them a single ref sample?
genuinely curious how you guys fit 108 more cores on the die while still using the same 55nm node O.o
maybe send them a single ref sample?
genuinely curious how you guys fit 108 more cores on the die while still using the same 55nm node O.o
It's called Bitfury magic. He has a magic power that enables him to do such things when he moves his hands over the computer keyboard.
Would be massive raping of 28nm ASIC designs
Be careful what you ask for
I wish bitfury was on 40nm
Would be massive raping of 28nm ASIC designs
Even at 55nm it is better than most of the 28nm designsWould be massive raping of 28nm ASIC designs
IF i ever win the USA Powerball lottery, I'll hop on board to finance R&D on taking ßitfury to a smaller node.
I wish bitfury was on 40nm
Would be massive raping of 28nm ASIC designs
Even at 55nm it is better than most of the 28nm designs Would be massive raping of 28nm ASIC designs
Definitely want to see etches of the chip like over at http://zeptobars.ru/en/read/bitfury-bitcoin-mining-chip
maybe send them a single ref sample?
genuinely curious how you guys fit 108 more cores on the die while still using the same 55nm node O.o
maybe send them a single ref sample?
genuinely curious how you guys fit 108 more cores on the die while still using the same 55nm node O.o
It's called Bitfury magic. He has a magic power that enables him to do such things when he moves his hands over the computer keyboard.
Would be massive raping of 28nm ASIC designs
Definitely want to see etches of the chip like over at http://zeptobars.ru/en/read/bitfury-bitcoin-mining-chip
maybe send them a single ref sample?
genuinely curious how you guys fit 108 more cores on the die while still using the same 55nm node O.o
maybe send them a single ref sample?
genuinely curious how you guys fit 108 more cores on the die while still using the same 55nm node O.o
It's called Bitfury magic. He has a magic power that enables him to do such things when he moves his hands over the computer keyboard.
OMG I've never been so happy to be wrong in all my life
Is there a rough formula to transform osc6 bits into Mhz?There is no relation between bits and MHz that can be calculated, because it also depends on the voltage. If you try my fork of cgminer it will periodically show the approximate MHz for the chip based on the time it takes to complete a job. The formula I have provided above is used in the code to show the expected GH/s for the chip based on the 'guessed' MHz
Here is how it looks like on my two chips board
EDIT: For 0.8V core voltage (if unchanged i.e. does not drop because of higher current drawn), the difference between 54 and 55 bits is ~8MHz
the first quote was me being a tad sarcastic. I had always been under the impression the gentleman/woman behind bitfury design had no intention of revising the silicon to correct the errors inherent in Rev.1
Definitely want to see etches of the chip like over at http://zeptobars.ru/en/read/bitfury-bitcoin-mining-chip
maybe send them a single ref sample?
genuinely curious how you guys fit 108 more cores on the die while still using the same 55nm node O.o
maybe send them a single ref sample?
genuinely curious how you guys fit 108 more cores on the die while still using the same 55nm node O.o
Will someone translate what 864 rolled hash cores means? What's the speed and what's the difference between rolled and un-rolled cores?
In a unrolled architecture the operations that make up
a certain calculation are laid down individually in silicon
in a pipelined fashion. This means every clock cycle another
calculation can be started and (after the pipe delay) every clock
tick another result is produced.
In a rolled architecture there is only a single 'main calculation
block' and partial results are fed back into that block until a
result is produced. Results are produce less frequent, but
the silicon area taken up is also smaller, so more loops can
be implemented on the same die.
When you roll up a calculation to a tight loop taking up less
area, changes of a defect of that block are smaller. However
there is a small penalty in silicon area for defining the stop condition
(i.e. 'is the calculation ready or not?').
I think we'll be working mostly with trays as they're much easier to work with (and test) in the quantities usually needed by DIYers. One full box of trays is 2600 chips.
'Mostly' means that there still will be reels I guess, but are the boxes vacuum sealed or it's each tray separately or neither and chips baking will be necessary?
Will someone translate what 864 rolled hash cores means? What's the speed and what's the difference between rolled and un-rolled cores?
Rolled core requires multiple clock cycles to complete the SHA256(SHA256(x)) (61+4 IIRC). 864 cores are working in parallel, so with clock of 220MHz the chip produces around 3 billion nonces per second. The difference between these two is in optimization of the design. In a nutshell rolled design is more resistant to errors in wafer production process and has other benefits as well.
OMG I've never been so happy to be wrong in all my life
Is there a rough formula to transform osc6 bits into Mhz?There is no relation between bits and MHz that can be calculated, because it also depends on the voltage. If you try my fork of cgminer it will periodically show the approximate MHz for the chip based on the time it takes to complete a job. The formula I have provided above is used in the code to show the expected GH/s for the chip based on the 'guessed' MHz
Here is how it looks like on my two chips board
EDIT: For 0.8V core voltage (if unchanged i.e. does not drop because of higher current drawn), the difference between 54 and 55 bits is ~8MHz
Will someone translate what 864 rolled hash cores means? What's the speed and what's the difference between rolled and un-rolled cores?
An unrolled core would calculate one hash at each clock, so running at 1MHz one core is 1MH/sA rolled core calculates the hash in several clock cycles - for Bitfury chips this is 65 cycles, so single core running at 1Mhz will produce close to 15.4 kH/s
If the chip runs at 200MHz - 864 cores are equal to 200*864/65 = 2658.46 MH/s or 2.66 GH/s
For comparison the first revision had 756 cores which at 200MHz is 2.33 GH/s so 15% increase is expected
Thank you very much! Can't wait for the populated DYI cheap boards!
Will someone translate what 864 rolled hash cores means? What's the speed and what's the difference between rolled and un-rolled cores?
An unrolled core would calculate one hash at each clock, so running at 1MHz one core is 1MH/sA rolled core calculates the hash in several clock cycles - for Bitfury chips this is 65 cycles, so single core running at 1Mhz will produce close to 15.4 kH/s
If the chip runs at 200MHz - 864 cores are equal to 200*864/65 = 2658.46 MH/s or 2.66 GH/s
For comparison the first revision had 756 cores which at 200MHz is 2.33 GH/s so 15% increase is expected
OMG I've never been so happy to be wrong in all my life
Except when I though my wife wasn't pregnant.
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Is there a rough formula to transform osc6 bits into Mhz?
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