ANN: BITMAIN has Tested Its 28nm Bitcoin Mining Chip BM1382

[mazedk]

About underclocking, what is the lowest freq?

Who would know the answer to a question for a machine that doesn't exist yet?   

bitmain

[allcoinminer]

About underclocking, what is the lowest freq?

Who would know the answer to a question for a machine that doesn't exist yet?  

bitmain

Underclocking was to S1 not S3. S3 at stock clock and S1 at underclocked/undervolted.
Its a pencil mode to make voltage at 0.85 per chip.
The ASIC chip frequency is 275M(freq_value: 0A81)  and with timeout of 45.
A hashing speed of around 140GH/S at 166Watts can be expected. Many miners confirmed it but may slightly vary for each miner.
Also try it yourselves to get 0.75V if possible.
refer the thread https://bitcointalk.org/index.php?topic=526060.0 for more details about how it can be achieved.

[powersup]

About underclocking, what is the lowest freq?

Who would know the answer to a question for a machine that doesn't exist yet?  

bitmain

Underclocking was to S1 not S3. S3 at stock clock and S1 at underclocked/undervolted.
Its a pencil mode to make voltage at 0.85 per chip.
The ASIC chip frequency is 275M(freq_value: 0A81)  and with timeout of 45.
A hashing speed of around 140GH/S at 166Watts can be expected. Many miners confirmed it but may slightly vary for each miner.
Also try it yourselves to get 0.75V if possible.
refer the thread https://bitcointalk.org/index.php?topic=526060.0 for more details about how it can be achieved.

Under-clocking or under-volting will be possible on the S3 as stated in the OP.  It will make the S3 gh/w comparable to SP10/30.

[allcoinminer]

About underclocking, what is the lowest freq?

Who would know the answer to a question for a machine that doesn't exist yet?  

bitmain

Underclocking was to S1 not S3. S3 at stock clock and S1 at underclocked/undervolted.
Its a pencil mode to make voltage at 0.85 per chip.
The ASIC chip frequency is 275M(freq_value: 0A81)  and with timeout of 45.
A hashing speed of around 140GH/S at 166Watts can be expected. Many miners confirmed it but may slightly vary for each miner.
Also try it yourselves to get 0.75V if possible.
refer the thread https://bitcointalk.org/index.php?topic=526060.0 for more details about how it can be achieved.

Under-clocking or under-volting will be possible on the S3 as stated in the OP.  It will make the S3 gh/w comparable to SP10/30.

Were talking about making S1 underclock and run S3 at stock clock to make them fit to the CX750 Cosair PSU.
S3 can be underclocked/undervolted but its requirement is far away and should be.
Further, S3 at stock clocks itself is efficient than SP10 also at chip level but SP30 scores but its only on or after August.
Process node of SP10 is 40nm, SP30(Aug!) is 28nm and S3 is 28nm
SP10 is at 0.89J/GH but S3 is at only 0.77J/GH; Chip level its 0.44J/GH for S3, 0.58J/GH for SP10 and 0.44J/GH for SP30.
But max S3 can be underclocked as per OP is up to 0.62J/GH. So it cannot beat to SP30 either. May be the resistor hack/pencil mode will take it further.
If we do all the math, BitMainTech Scores for now! Price will only be the concern.

[cxboyminer]

Is there any pencil mod for s1? Can't seem to find any via Google?

[Bhosted]

ROI on S3 500GH

This is at a 30% monthly increase.

Jun-14 13463 1338 0.55 0.44 0.44
Jul-14 17501 1740 0.42 0.32 0.76
Aug-14 22752 2262 0.32 0.22 0.97
Sep-14 29577 2941 0.25 0.14 1.12
Oct-14 38450 3823 0.19 0.09 1.20
Nov-14 49986 4970 0.15 0.04 1.24
Dec-14 64981 6461 0.11 0.01 1.25
Jan-15 84476 8399 0.09 -0.02 1.24
Feb-15 109818 10918 0.07 -0.04 1.20
Mar-15 142764 14194 0.05 -0.05 1.14
Apr-15 185593 18452 0.04 -0.07 1.08
May-15 241271 23988 0.03 -0.07 1.00

[Bhosted]

ROI on current S2, with the cost of the unit and electric there is no way to make any money. Unless there is a coupon day.

Jun-14 13463 669 1.09 0.88 0.88
Jul-14 17501 870 0.84 0.63 1.51
Aug-14 22752 1131 0.65 0.44 1.95
Sep-14 29577 1470 0.50 0.29 2.23
Oct-14 38450 1911 0.38 0.17 2.41
Nov-14 49986 2485 0.29 0.08 2.49
Dec-14 64981 3230 0.23 0.02 2.51
Jan-15 84476 4199 0.17 -0.04 2.47
Feb-15 109818 5459 0.13 -0.08 2.39
Mar-15 142764 7097 0.10 -0.11 2.29
Apr-15 185593 9226 0.08 -0.13 2.16
May-15 241271 11994 0.06 -0.15 2.01

[philipma1957]

Is there any pencil mod for s1? Can't seem to find any via Google?

there is a long thread here somewhere.   I will look for you



and here it is

btw a great mod.  I run 3 s-1's at 420gh and 560 watts dead stable

https://bitcointalk.org/index.php?topic=526060.0

[s1gs3gv]

Does anyone have any other PSU ideas to power 3 S3s?

Some of the old BCTalk hands are using server PSUs like the DPS2000-BB
160+ Amps @ 12V for $35 - 50 refurbished. Sounds like custom cables are a requirement when using this.

[spazzdla]

Seven days over do... BOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO.

[fractal02]

Seven days over do... BOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO.

Still no news ? 

[oskuro]

i want to know S3 price come onnn

[ZiG]

i want to know S3 price come onnn

+1...


BTW...Surprise...:

GAWMiners is selling 1.1TH based on A1 chips for $1399...

http://www.gawminers.com/products/bitcoin-sha-256/1-1-th-s-gridseed-a1-asic-bitcoin-miner/


So...there is NO way S3 to be priced more than $700... 1.15 to 1.19 BTC MAX...

ZiG

Next diff jump would force price even lower...like 25% less... $550 or so...

[Biodom]

i want to know S3 price come onnn

+1...


BTW...Surprise...:

GAWMiners is selling 1.1TH based on A1 chips for $1399...

http://www.gawminers.com/products/bitcoin-sha-256/1-1-th-s-gridseed-a1-asic-bitcoin-miner/


So...there is NO way S3 to be priced more than $700... 1.15 to 1.19 BTC MAX...

ZiG

Next diff jump would force price even lower...like 25% less... $550 or so...

You have to add $70-169 for FEDEX ground or express. With FEDEX ground, it is $1450

[ZiG]

i want to know S3 price come onnn

+1...


BTW...Surprise...:

GAWMiners is selling 1.1TH based on A1 chips for $1399...

http://www.gawminers.com/products/bitcoin-sha-256/1-1-th-s-gridseed-a1-asic-bitcoin-miner/


So...there is NO way S3 to be priced more than $700... 1.15 to 1.19 BTC MAX...

ZiG

Next diff jump would force price even lower...like 25% less... $550 or so...

You have to add $70-169 for FEDEX ground or express. With FEDEX ground, it is $1450

FREE ground shipping in USA over $300, buddy... $1399.95 in my cart...

[timk225]

Ok mathmeticians, figure out the answer to this one.

Let's say you had one of these 500 Ghash miners, and you could time travel back to January 2009, when the difficulty stayed at 1 almost the entire year.

And let's say you put this miner to work, pimping out the hashes like a mutha.

Now here's the math part:  since BTC is limited to a 4X difficulty increase with each adjustment, would it be more profitable to:

1. let the thing hash non stop and let the difficulty rise over a few adjustments to its equilibrium point,...  OR...

2. once the difficulty rises, shut off the big miner for a few weeks and let difficulty drop back to 1, then turn it on and run it up again?

I think letting it run non stop, even with higher difficulty after the first few adjustments would be more profitable.

Math it out!

[allcoinminer]

i want to know S3 price come onnn

+1...


BTW...Surprise...:

GAWMiners is selling 1.1TH based on A1 chips for $1399...

http://www.gawminers.com/products/bitcoin-sha-256/1-1-th-s-gridseed-a1-asic-bitcoin-miner/


So...there is NO way S3 to be priced more than $700... 1.15 to 1.19 BTC MAX...

ZiG

Next diff jump would force price even lower...like 25% less... $550 or so...

They are not a competitor for Antminer S3. Look at that Gridseed A1 ASIC device specifications.
Its Normal Hashrate is 1100 GH/s and Power Consumption is 1300W.
Which means its consuming 1.18J/GH device where Antminer S3 will only consume 0.77/GH.
Inshort its 53% less efficient than S3. So the Gridseed A1 will become worthless much before S3.
Regarding cost of the device, Gridseed A1 includes a PSU but S3 doesn't. Shipping will be free for S3 too.
If, we assume the A1 psu costs around $350 the price of device to compare with S3 is $480.
Then, if we need to factor in the J/GH, that a difficult task. IMHO the S3 price will not be below $480 as of now.

[contactlight]

i want to know S3 price come onnn

+1...


BTW...Surprise...:

GAWMiners is selling 1.1TH based on A1 chips for $1399...

http://www.gawminers.com/products/bitcoin-sha-256/1-1-th-s-gridseed-a1-asic-bitcoin-miner/


So...there is NO way S3 to be priced more than $700... 1.15 to 1.19 BTC MAX...

ZiG

Next diff jump would force price even lower...like 25% less... $550 or so...

They are not a competitor for Antminer S3. Look at that Gridseed A1 ASIC device specifications.
Its Normal Hashrate is 1100 GH/s and Power Consumption is 1300W.
Which means its consuming 1.18J/GH device where Antminer S3 will only consume 0.77/GH.
Inshort its 53% less efficient than S3. So the Gridseed A1 will become worthless much before S3.
Regarding cost of the device, Gridseed A1 includes a PSU but S3 doesn't. Shipping will be free for S3 too.
If, we assume the A1 psu costs around $350 the price of device to compare with S3 is $480.
Then, if we need to factor in the J/GH, that a difficult task. IMHO the S3 price will not be below $480 as of now.

I would definitely buy 3 S3s if they are $480.

Isn't it supposed to come out today?

[Paxter]

S2 delivery date pushed again 30th

[Mudbankkeith]

S2 delivery date pushed again 30th

S2 despatch is always going to be 2 days after order.

order today Friday 27th despatch is Monday 30th

order Saturday or Sunday then despatch will be Tuesday 1st

If you notice, the price is still dropping as well.