Author

Topic: Bitmain Antminer S4 ! (Read 7766 times)

legendary
Activity: 1344
Merit: 1024
Mine at Jonny's Pool
September 25, 2014, 09:25:36 AM
#70
Oh, and unlike every other Bitmain offering to date, shipping is NOT included in the $1450 price.

EDIT:

So, now that it's officially on sale, all I can say is, "are you freaking kidding?"

$1450 (currently 3.514BTC), shipping not included.  Shipped to Umisoo cost is 0.103BTC.  Shipped to my home cost is 0.39BTC.
2TH/s at 1380W (0.69W/GH/s).

You've got a better chance of stepping in a pile of fresh dinosaur shit while being struck by lightning than you do of making your investment back with this thing.
hero member
Activity: 1372
Merit: 783
better everyday ♥
September 25, 2014, 08:42:31 AM
#69
There are really no good hardware options to buy at the moment close to ROI.

This is the only half way decent one right now, at a reasonable price:

https://bitcointalksearch.org/topic/closed-asicminer-prisma-14ths-147-btc-795477
hero member
Activity: 784
Merit: 1004
Glow Stick Dance!
September 25, 2014, 01:55:41 AM
#68
sp30 starting to look real good now. sad to say. < bitmaintech fan and owner

Except they haven't been selling SP30s for quite some time now. Your only options are SP20 delivering the 2nd half of October or SP35 shipping late November.
newbie
Activity: 56
Merit: 0
September 24, 2014, 08:54:29 PM
#67
sp30 starting to look real good now. sad to say. < bitmaintech fan and owner
sr. member
Activity: 420
Merit: 250
September 24, 2014, 04:25:27 PM
#66

Well, that determines that the S4 is for the rich bitcoinists, and all the rest, who can count will buy the batch10 Antminer S3, because with that you can have 2 ths with only 2,32 BTC!
hero member
Activity: 1372
Merit: 783
better everyday ♥
September 24, 2014, 03:47:49 PM
#65
I ordered yesterday 2 s3+ s  costing 1.16 BTC.
If the price of S4 which is 2TH/s is 1.16 or lower it's ........beeeep.
I think bitmain will make S4 ships single not like S3 shipping double.
And I guess the price of S4 will be 1.38 btc
Anyway I may also order s4 depending on the price.


Close!  Just 2 BTC's short.... Cry
hero member
Activity: 784
Merit: 1004
Glow Stick Dance!
September 24, 2014, 02:47:51 PM
#64
"Oh, if Bitmain prices the S4 at 30 cents each, I'll buy 10!"

Once again the pie-in-the-sky optimists are shot down in flames, lol.
legendary
Activity: 1344
Merit: 1024
Mine at Jonny's Pool
September 24, 2014, 01:32:42 PM
#63
newbie
Activity: 56
Merit: 0
September 24, 2014, 01:07:35 PM
#62
If the price is 1.38 or more then it better come with a psu unit for that price and the full 2th once you over clock it.
member
Activity: 61
Merit: 10
September 24, 2014, 10:20:29 AM
#61
I ordered yesterday 2 s3+ s  costing 1.16 BTC.
If the price of S4 which is 2TH/s is 1.16 or lower it's ........beeeep.
I think bitmain will make S4 ships single not like S3 shipping double.
And I guess the price of S4 will be 1.38 btc
Anyway I may also order s4 depending on the price.


Good luck if you think you're going to be paying 1.38btc for an antminer s4  Grin
sr. member
Activity: 448
Merit: 250
September 24, 2014, 09:28:53 AM
#60
so is it out, or any specs known ?

Nope, the only info is 2TH
newbie
Activity: 56
Merit: 0
September 23, 2014, 03:54:20 PM
#59
I hope the price is lower we were going to buy a mass load of s3's but if its lower then spoonies hardware then we may be talking about something interesting and i wouldn't mind it being without a psu I can rig the psu myself if it means cheaper prices.
legendary
Activity: 1148
Merit: 1000
September 17, 2014, 07:41:35 AM
#58
Batch 8 of the S3 and the S1 upgrade kit do not even resume shipping until September 20th.  so I would not expect to see another device from them anytime soon.

Quoting myself too...for being 180 out like a distributor in an old chevy!
full member
Activity: 182
Merit: 100
September 17, 2014, 04:20:33 AM
#57
so is it out, or any specs known ?
legendary
Activity: 1344
Merit: 1024
Mine at Jonny's Pool
September 16, 2014, 03:09:25 PM
#56
I guess since they fitted 10 cards inside a S2 they will now take the 10 cards in the S4 making it a monster of 4.5Th/s
clear speculation off-course!!!
If the S4 follows the pattern of the S2, it certainly won't be 4.5TH/s.  Remember, the S2 underclocked/undervolted the BM1380 chips from the S1 to make that 1TH/s at 1100W - typical ratio of the chip was 2W/GH/s.  If they hadn't, the S2 would have been a 1.8TH/s miner consuming 3600W.

The speculation is that the S4 will indeed follow the same paradigm established by the S2.  My thoughts on the specs are earlier in this thread, but to reiterate them here, I believe it will be around 2.2TH/s at about 1300W.  If Bitmain wants to use the same PSU as the S2, then it'll probably be closer to 2TH/s at 1100W.
Quoting myself ... looks like I was spot on.
full member
Activity: 133
Merit: 100
September 16, 2014, 02:29:41 PM
#55
I ordered yesterday 2 s3+ s  costing 1.16 BTC.
If the price of S4 which is 2TH/s is 1.16 or lower it's ........beeeep.
I think bitmain will make S4 ships single not like S3 shipping double.
And I guess the price of S4 will be 1.38 btc
Anyway I may also order s4 depending on the price.
full member
Activity: 238
Merit: 100
Wanna buy a Tesla? Visit TeslaBargain.com first!
September 16, 2014, 10:24:26 AM
#54
Ask and ye shall receive!   Grin https://www.bitmaintech.com/productDetail.htm?pid=00020140916100720380cS1tRWd00684 2 TH/s shipping before the end of September, get 'em while they're hot!   Tongue

Holy crap! Now if they only get $/GH and W/GH right!  Shocked
hero member
Activity: 1372
Merit: 783
better everyday ♥
September 16, 2014, 09:30:03 AM
#53
Ask and ye shall receive!   Grin

https://www.bitmaintech.com/productDetail.htm?pid=00020140916100720380cS1tRWd00684

2 TH/s shipping before the end of September, get 'em while they're hot!   Tongue
hero member
Activity: 784
Merit: 1004
Glow Stick Dance!
September 15, 2014, 07:12:55 PM
#52
Still waiting for s4.. any sneak peak?

I think they just had Moon festival last week.  They are celebrating Sun festival right now.

When's the Festival of the Dung Pile?
legendary
Activity: 1344
Merit: 1024
Mine at Jonny's Pool
September 15, 2014, 02:09:17 PM
#51
Waiting for this really long, hopefully its 100th
100TH/s?  You might want to rethink that one... not a chance in hell of that happening.
newbie
Activity: 11
Merit: 0
September 15, 2014, 08:04:40 AM
#50
Waiting for this really long, hopefully its 100th
full member
Activity: 182
Merit: 100
September 15, 2014, 07:48:29 AM
#49
sothis should be next top-seller, right ?
hero member
Activity: 784
Merit: 1000
Live Stars - Adult Streaming Platform
September 14, 2014, 08:55:36 AM
#48
Still waiting for s4.. any sneak peak?

I think they just had Moon festival last week.  They are celebrating Sun festival right now.
sr. member
Activity: 243
Merit: 250
September 14, 2014, 04:52:00 AM
#47
Still waiting for s4.. any sneak peak?
hero member
Activity: 784
Merit: 1004
Glow Stick Dance!
September 13, 2014, 06:43:37 PM
#46
still no news... they are getting chewed by spondoolies

The S3s are still selling like hotcakes. They'd only cannibalize sales of the S3 if they introduced the S4 now. They know what they are doing. They're maximizing profits. And no, Spondoolies is not "chewing" them. They're probably still outselling them 10-1.
legendary
Activity: 1120
Merit: 1001
September 13, 2014, 02:32:16 PM
#45
still no news... they are getting chewed by spondoolies
full member
Activity: 238
Merit: 100
Wanna buy a Tesla? Visit TeslaBargain.com first!
September 08, 2014, 01:40:23 PM
#44
legendary
Activity: 1036
Merit: 1000
September 08, 2014, 12:36:30 PM
#43
were did you read this...
I think they spent much time building the hashnest and this is why S3 production delayed for a month
they dont have time I guess
full member
Activity: 238
Merit: 100
Wanna buy a Tesla? Visit TeslaBargain.com first!
September 08, 2014, 05:36:02 AM
#42
They just came out with an S1 upgrade, so I don't think a S4 will come out soon.

You must have overlooked that an update on the S4 test results was announced by @BITMAIN already due last Tuesday.

With the SP20 now around the corner, Bitmaintech does not have much time left to come up with something that is at least on par with the specs (means whatever they can tickle out of the 28nm tech to optimize hashing power vs. energy consumption).
legendary
Activity: 1120
Merit: 1001
September 08, 2014, 05:07:46 AM
#41
nobody is buying the s3 anymore.
i think it would be a good ideea to come out with an s4
sr. member
Activity: 542
Merit: 251
September 07, 2014, 07:36:26 PM
#40
They just came out with an S1 upgrade, so I don't think a S4 will come out soon.
legendary
Activity: 1120
Merit: 1001
September 07, 2014, 04:05:42 PM
#39
come on bitmain, give us some news !
full member
Activity: 238
Merit: 100
Wanna buy a Tesla? Visit TeslaBargain.com first!
September 05, 2014, 01:26:10 PM
#38
OMG, the S4 has been released TODAY! This is insane!

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Just think about it before getting fooled by a joke!  Grin
full member
Activity: 236
Merit: 100
September 05, 2014, 08:51:13 AM
#37
I believe that Antminer S4 will come out in October. Just a hunch

I have herd that S4 will be released later on this week.

Really? where did you get that info.
sr. member
Activity: 910
Merit: 302
September 05, 2014, 06:30:14 AM
#36
heard where?
newbie
Activity: 13
Merit: 0
September 03, 2014, 11:02:17 AM
#35
I believe that Antminer S4 will come out in October. Just a hunch

I have herd that S4 will be released later on this week.
legendary
Activity: 1120
Merit: 1001
September 01, 2014, 08:23:01 AM
#34
the S3 is already getting outdated with only 453 GH/s at the price of 0.58 BTC without PSU

Any news on the upcoming Antminer S4 ?

We do need a solid unit producing more than 2 TH/S +,  maybe at the price of 1,5 BTC or lower

I was hoping something like 5-10 TH/s and really compact. Waiting patiently..

Hashrate means nothing if you dont even have ROI.

Dont come back here and cry because you're super doper 100TH/s is a lost investment.


dude,really ?
legendary
Activity: 2968
Merit: 1198
August 31, 2014, 11:15:22 PM
#33
For some people, hashing boards became disconnected during transport and were tossed around inside of the miner.

That's because they were idiots and didn't attach the boards to anything. Take a look at any PC. There is a bracket at the back of each card that screws into the case. Missing from the S2 (mis)design.

hero member
Activity: 658
Merit: 500
August 31, 2014, 10:23:45 PM
#32
the S3 is already getting outdated with only 453 GH/s at the price of 0.58 BTC without PSU

Any news on the upcoming Antminer S4 ?

We do need a solid unit producing more than 2 TH/S +,  maybe at the price of 1,5 BTC or lower

I was hoping something like 5-10 TH/s and really compact. Waiting patiently..

Hashrate means nothing if you dont even have ROI.

Dont come back here and cry because you're super doper 100TH/s is a lost investment.
legendary
Activity: 1120
Merit: 1001
August 31, 2014, 06:52:56 PM
#31
any news on the S4 ? i've heard they are already testing it !
hero member
Activity: 784
Merit: 1004
Glow Stick Dance!
August 30, 2014, 05:01:05 AM
#30
Bitmain as we have noticed is afraid the transport of bigger boxes from China.
They prefer small antminer boxes like s1-s3 when they have problems with S2.
Remember the horror pictures we saw early 2014 with the S2 miners
So making a big big miner boxes is a problem

What problem did they face transporting big box?

For some people, hashing boards became disconnected during transport and were tossed around inside of the miner. They eventually improved the design and it became much less common. I'm sure they've learned their lesson.

But for most people, all they had to do was open the case and push down on the boards to reseat them.
sr. member
Activity: 255
Merit: 250
August 30, 2014, 01:09:35 AM
#29
Bitmain as we have noticed is afraid the transport of bigger boxes from China.
They prefer small antminer boxes like s1-s3 when they have problems with S2.
Remember the horror pictures we saw early 2014 with the S2 miners
So making a big big miner boxes is a problem

What problem did they face transporting big box?
legendary
Activity: 1036
Merit: 1000
August 29, 2014, 03:21:39 PM
#28
Bitmain as we have noticed is afraid the transport of bigger boxes from China.
They prefer small antminer boxes like s1-s3 when they have problems with S2.
Remember the horror pictures we saw early 2014 with the S2 miners
So making a big big miner boxes is a problem
member
Activity: 116
Merit: 10
August 29, 2014, 02:52:34 AM
#27
Sp-31 maybe expensive but its good looking

interesting to see

SP-31               3920 uSD / 5500 ghs = 0,7127
S3     0,58btc      300 USD /   450 gh  = 0,66 (if its 500Gh then 0,60)

off-course needed PSU for the S3 and its more quiet for household use.
I dont mind the noise as I host them in my warehouse

now if S4 goes for 2000 ghs we must wait to see the price
 

Was hopping S4 is at least 5 Th and is cheaper then SP-31 in-term of price/ghs
legendary
Activity: 1036
Merit: 1000
August 29, 2014, 02:25:35 AM
#26
Sp-31 maybe expensive but its good looking

interesting to see

SP-31               3920 uSD / 5500 ghs = 0,7127
S3     0,58btc      300 USD /   450 gh  = 0,66 (if its 500Gh then 0,60)

off-course needed PSU for the S3 and its more quiet for household use.
I dont mind the noise as I host them in my warehouse

now if S4 goes for 2000 ghs we must wait to see the price
 
full member
Activity: 202
Merit: 100
August 29, 2014, 02:04:47 AM
#25
S4 might end up being some rack mounted creature to compete with SP31s.  It may not be usable in households (at least not US 110V).

I actually prefer SP31 because of the compact setup.
DrG
legendary
Activity: 2086
Merit: 1035
August 28, 2014, 09:30:08 PM
#24
S4 might end up being some rack mounted creature to compete with SP31s.  It may not be usable in households (at least not US 110V).
hero member
Activity: 784
Merit: 1004
Glow Stick Dance!
August 28, 2014, 08:06:06 PM
#23
I guess since they fitted 10 cards inside a S2 they will now take the 10 cards in the S4 making it a monster of 4.5Th/s
clear speculation off-course!!!

Good luck hooking up three 1200w PSUs to that! Lol.

This reminds me of the poor souls who used moron-math and thought KNC was going to ship them 15THs Neptunes instead of 3THs.
legendary
Activity: 1120
Merit: 1001
August 28, 2014, 03:36:43 PM
#22
they would improve the PSU, ofc.
legendary
Activity: 1344
Merit: 1024
Mine at Jonny's Pool
August 28, 2014, 12:41:05 PM
#21
I guess since they fitted 10 cards inside a S2 they will now take the 10 cards in the S4 making it a monster of 4.5Th/s
clear speculation off-course!!!
If the S4 follows the pattern of the S2, it certainly won't be 4.5TH/s.  Remember, the S2 underclocked/undervolted the BM1380 chips from the S1 to make that 1TH/s at 1100W - typical ratio of the chip was 2W/GH/s.  If they hadn't, the S2 would have been a 1.8TH/s miner consuming 3600W.

The speculation is that the S4 will indeed follow the same paradigm established by the S2.  My thoughts on the specs are earlier in this thread, but to reiterate them here, I believe it will be around 2.2TH/s at about 1300W.  If Bitmain wants to use the same PSU as the S2, then it'll probably be closer to 2TH/s at 1100W.
legendary
Activity: 1036
Merit: 1000
August 28, 2014, 12:09:02 PM
#20
I guess since they fitted 10 cards inside a S2 they will now take the 10 cards in the S4 making it a monster of 4.5Th/s
clear speculation off-course!!!
legendary
Activity: 1512
Merit: 1000
August 27, 2014, 03:59:53 PM
#19
How close are they to roi?

They're at 67%, would be closer to 80% but had some shit luck at BTCGuild for a good stretch when I first set them up.

Should be in the black within the next two to three months.  Undecided
legendary
Activity: 1512
Merit: 1000
August 27, 2014, 02:25:55 PM
#18
You're totally right if they stick to this and make it a pattern this very well could happen.

I hope so!  Although I'm not very confident that I'd upgrade my S2s even if they do release something. My S2s have still not hit ROI and I don't like to throw good money after bad.
legendary
Activity: 1316
Merit: 1014
ex uno plures
August 27, 2014, 10:30:55 AM
#17
The S2 looked like it was made to help clear remaining stocks of the old chip before introduction of BM1382 based machines.
I don't expect to see an S4 until Bitmain are ready to clear out old stocks of the BM1382 in preparation for the successor to the S3. My guess is this will happen in 2015 given the current success of S3 orders.
legendary
Activity: 1512
Merit: 1000
August 27, 2014, 09:49:37 AM
#16
They're going to milk their product until its time for the next generation of miners and october is pretty soon for another iteration of Antminer.

S3 is to S1 as S4 is to S2 would be my guess.  They can create the S4 and still "milk their product".
newbie
Activity: 59
Merit: 0
August 27, 2014, 12:20:31 AM
#15
I believe that Antminer S4 will come out in October. Just a hunch
   a long way out. 35 plus days

Agree, after 35 days the difficulty would increase at least 50%.
legendary
Activity: 4256
Merit: 8551
'The right to privacy matters'
August 26, 2014, 08:59:56 PM
#14
I believe that Antminer S4 will come out in October. Just a hunch
   a long way out. 35 plus days
newbie
Activity: 54
Merit: 0
August 26, 2014, 08:57:35 PM
#13
I believe that Antminer S4 will come out in October. Just a hunch
legendary
Activity: 4256
Merit: 8551
'The right to privacy matters'
August 26, 2014, 07:55:25 PM
#12
Are they switching to 20nm for S4? Any info when we can expect it at all?
I highly doubt it.  Chances are they're going to follow the same paradigm with the S4 as they did with the S2: lots of underclocked chips.  So, they'll continue to use the BM1382 that's in the S3.  Quite honestly, I'd expect the S4 to look pretty much exactly like the S2, with some minor improvements like better bracing of the hashing boards on the backplane, etc.  My expectation is somewhere around 2.2TH/s at 1300W will be the specs on the unit.

Well whats the point of making new ones at the same W/GH ratio? We can just order bunches S3s.
It's a better W/GH ratio... S3 is 0.77W/GH, my expectation above is about 0.59W/GH.  I don't think they're going to see the kind of improvement they saw on the S1/S2 simply because the BM1382 chip is already achieving a respectable power to hash ratio.  Hopefully I'm wrong and they manage less than 0.5W/GH... but I doubt it.

there is not much money in s4. even at 1300 w/2.2th it has to be just $1500-1600 to be a leader/competitive in the next mo or two.

well you can order this 1.4th -1.7th  dragon using 1070 watts   for 1290 usd sans psu


https://bitcointalksearch.org/topic/1379-dragon-15t-bitcoin-miner-07-wghs-shipment-fee-and-psu-included-755719


 it will ship on the 2nd of sept.  may be best deal around


if you buy 2 it is 1265 each

if you buy 3 it is 1240 each
legendary
Activity: 3892
Merit: 4331
August 26, 2014, 06:29:56 PM
#11
Are they switching to 20nm for S4? Any info when we can expect it at all?
I highly doubt it.  Chances are they're going to follow the same paradigm with the S4 as they did with the S2: lots of underclocked chips.  So, they'll continue to use the BM1382 that's in the S3.  Quite honestly, I'd expect the S4 to look pretty much exactly like the S2, with some minor improvements like better bracing of the hashing boards on the backplane, etc.  My expectation is somewhere around 2.2TH/s at 1300W will be the specs on the unit.

Well whats the point of making new ones at the same W/GH ratio? We can just order bunches S3s.
It's a better W/GH ratio... S3 is 0.77W/GH, my expectation above is about 0.59W/GH.  I don't think they're going to see the kind of improvement they saw on the S1/S2 simply because the BM1382 chip is already achieving a respectable power to hash ratio.  Hopefully I'm wrong and they manage less than 0.5W/GH... but I doubt it.

there is not much money in s4. even at 1300 w/2.2th it has to be just $1500-1600 to be a leader/competitive in the next mo or two.
full member
Activity: 122
Merit: 100
August 26, 2014, 03:14:21 PM
#10
Batch 8 of the S3 and the S1 upgrade kit do not even resume shipping until September 20th.  so I would not expect to see another device from them anytime soon.

You will be pretty shocked, they might be testing new chip for a s4 right now. 
legendary
Activity: 1344
Merit: 1024
Mine at Jonny's Pool
August 26, 2014, 01:55:11 PM
#9
Are they switching to 20nm for S4? Any info when we can expect it at all?
I highly doubt it.  Chances are they're going to follow the same paradigm with the S4 as they did with the S2: lots of underclocked chips.  So, they'll continue to use the BM1382 that's in the S3.  Quite honestly, I'd expect the S4 to look pretty much exactly like the S2, with some minor improvements like better bracing of the hashing boards on the backplane, etc.  My expectation is somewhere around 2.2TH/s at 1300W will be the specs on the unit.

Well whats the point of making new ones at the same W/GH ratio? We can just order bunches S3s.
It's a better W/GH ratio... S3 is 0.77W/GH, my expectation above is about 0.59W/GH.  I don't think they're going to see the kind of improvement they saw on the S1/S2 simply because the BM1382 chip is already achieving a respectable power to hash ratio.  Hopefully I'm wrong and they manage less than 0.5W/GH... but I doubt it.
sr. member
Activity: 910
Merit: 302
August 26, 2014, 01:30:20 PM
#8
Are they switching to 20nm for S4? Any info when we can expect it at all?
I highly doubt it.  Chances are they're going to follow the same paradigm with the S4 as they did with the S2: lots of underclocked chips.  So, they'll continue to use the BM1382 that's in the S3.  Quite honestly, I'd expect the S4 to look pretty much exactly like the S2, with some minor improvements like better bracing of the hashing boards on the backplane, etc.  My expectation is somewhere around 2.2TH/s at 1300W will be the specs on the unit.

Well whats the point of making new ones at the same W/GH ratio? We can just order bunches S3s.
legendary
Activity: 2590
Merit: 1022
Leading Crypto Sports Betting & Casino Platform
August 26, 2014, 09:40:16 AM
#7
i need more info, it may turn to be profitable for the first few months, diff might stay there if the price is decreasing
legendary
Activity: 1148
Merit: 1000
August 26, 2014, 08:23:41 AM
#6
Batch 8 of the S3 and the S1 upgrade kit do not even resume shipping until September 20th.  so I would not expect to see another device from them anytime soon.
legendary
Activity: 1344
Merit: 1024
Mine at Jonny's Pool
August 26, 2014, 07:56:47 AM
#5
Are they switching to 20nm for S4? Any info when we can expect it at all?
I highly doubt it.  Chances are they're going to follow the same paradigm with the S4 as they did with the S2: lots of underclocked chips.  So, they'll continue to use the BM1382 that's in the S3.  Quite honestly, I'd expect the S4 to look pretty much exactly like the S2, with some minor improvements like better bracing of the hashing boards on the backplane, etc.  My expectation is somewhere around 2.2TH/s at 1300W will be the specs on the unit.
sr. member
Activity: 910
Merit: 302
August 26, 2014, 05:54:03 AM
#4
Are they switching to 20nm for S4? Any info when we can expect it at all?
member
Activity: 98
Merit: 10
August 26, 2014, 05:45:24 AM
#3
the S3 is already getting outdated with only 453 GH/s at the price of 0.58 BTC without PSU

Any news on the upcoming Antminer S4 ?

We do need a solid unit producing more than 2 TH/S +,  maybe at the price of 1,5 BTC or lower

I was hoping something like 5-10 TH/s and really compact. Waiting patiently..
hero member
Activity: 630
Merit: 500
August 25, 2014, 11:45:28 AM
#2
they should come out with their S2 upgrade before they announce an S4.  maybe they will announce in conjunction.  if you assume the same ratio increase as the S1 -> S3, then the upgraded S2 "should" be somewhere in the area of 2.4+TH, and i think with some room for overclocking.
legendary
Activity: 1120
Merit: 1001
August 25, 2014, 11:41:59 AM
#1
the S3 is already getting outdated with only 453 GH/s at the price of 0.58 BTC without PSU

Any news on the upcoming Antminer S4 ?

We do need a solid unit producing more than 2 TH/S +,  maybe at the price of 1,5 BTC or lower
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