Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 29. (Read 527791 times)
April 01, 2016, 07:41:51 AM
About these coupons, can they be used with hashnest or only for physically purchasing a miner?
April 01, 2016, 07:01:23 AM
Anyone got a free 1 x $100 coupon to donate to me?
I got one for you. PM me your bitmaintech.com user id.I'm hoping that the one fan version of Antminer S7 is April fools only.
Sent and thank you very much.
April 01, 2016, 05:35:10 AM
Anyone got a free 1 x $100 coupon to donate to me?
I got one for you. PM me your bitmaintech.com user id.I'm hoping that the one fan version of Antminer S7 is April fools only.
if not it will be impossible to run this in any warm climate..
April 01, 2016, 04:39:29 AM
Anyone got a free 1 x $100 coupon to donate to me?
edit: now I have no coupons.
I'm hoping that the one fan version of Antminer S7 is April fools only.
April 01, 2016, 02:48:13 AM
Anyone got a free 1 x $100 coupon to donate to me?
April 01, 2016, 12:53:23 AM
Probably going to be impossible to re-glue any heatsinks that fall off.
No, i did that before on my B3 4.86, i made a thermal glue with AL2O3 from reading orginal elecolit MSDS.
if you want to know how is that, i can provide pictures again
it tooks 4 days, 54 chip re pasting is very hard work.
like that , this is my thermal paste 6 times higher thermal conductivity from bitmains black shitty epoxy. 3 times higher then B1 white epoxy.
and also i remove chip cover too.
https://bitcointalksearch.org/topic/m.13230506
https://bitcointalksearch.org/topic/m.13478078
I used a dot of superglue on two heatsinks on an earlier batch and not wanting to wait weeks on end to ship the hash boards back during Chinese holiday.. Still running strong at 700freq and no issues
March 31, 2016, 11:26:24 PM
That area in the middle gets no airflow.
March 31, 2016, 11:06:30 PM
Looks only like a very poor photographer's job! crap lighting....
March 31, 2016, 10:26:04 PM
he means this one and yes its a horrible pic to use.. it looks like its been used several months.
i dont care if its 100$ off, if i got one looking like this id be hella mad.
i dont care if its 100$ off, if i got one looking like this id be hella mad.
March 31, 2016, 10:13:44 PM
Quote
Error 1011 Ray ID: 28c8856c4103062e • 2016-04-01 02:13:19 UTC
Access denied
What happened?
The owner of this website (bitmaintech.com) does not allow hotlinking to that resource (/bm_tech_admin_at_123/userfiles/image/MAC_00507.jpg).
Access denied
What happened?
The owner of this website (bitmaintech.com) does not allow hotlinking to that resource (/bm_tech_admin_at_123/userfiles/image/MAC_00507.jpg).
Maybe you should have saved the pic!
March 31, 2016, 09:39:30 PM
Um, anyone looked closely at the pic with fan removed? https://bitmaintech.com/bm_tech_admin_at_123/userfiles/image/MAC_00507.jpg Pretty crusty looking. 
Looks rather 'well-tested' to me....
Looks rather 'well-tested' to me....
March 31, 2016, 08:41:43 PM
the S7 fan design is a "suck air" + "blow air" method, no?
which fan are they removing?
sucking or blowing one?
no punt intended
which fan are they removing?
sucking or blowing one?
no punt intended
Looks like the blow/pull fan is removed to me.
March 31, 2016, 07:29:57 PM
But what can we say really. Has anyone actually tested a batch 8-16 Antminer S7 with a one fan?
I agree though that I wouldn't run mine with just one fan either.
I agree though that I wouldn't run mine with just one fan either.
Anybody brave enough to test this?
I tested one fan on my batch 8 which only took 1200W from wall but it was about 70C at 20C room with fan at full speed and I didn't have balls to run it that high temp.
Batch 16 April fool miner??
Batch 16 warranty:
"3. In some cases, the warranty will be void
c. Burnt parts on hash boards or chips"
That is nothing new on batch 16. They include " c. Burnt parts on hash boards or chips;" in other batches aswell on warranty. It gives them the right to reject RMA if they think was pushed to far or in bad conditions is my guess on reasoning.
So nothing really new there. The one fan is the new part.
yess this is not new.
https://bitcointalksearch.org/topic/m.12982754
First version
second and last improved version
March 31, 2016, 06:10:59 PM
But what can we say really. Has anyone actually tested a batch 8-16 Antminer S7 with a one fan?
I agree though that I wouldn't run mine with just one fan either.
I agree though that I wouldn't run mine with just one fan either.
Anybody brave enough to test this?
I tested one fan on my batch 8 which only took 1200W from wall but it was about 70C at 20C room with fan at full speed and I didn't have balls to run it that high temp.
Batch 16 April fool miner??
Batch 16 warranty:
"3. In some cases, the warranty will be void
c. Burnt parts on hash boards or chips"
That is nothing new on batch 16. They include " c. Burnt parts on hash boards or chips;" in other batches aswell on warranty. It gives them the right to reject RMA if they think was pushed to far or in bad conditions is my guess on reasoning.
So nothing really new there. The one fan is the new part.
March 31, 2016, 06:01:15 PM
But what can we say really. Has anyone actually tested a batch 8-16 Antminer S7 with a one fan?
I agree though that I wouldn't run mine with just one fan either.
I agree though that I wouldn't run mine with just one fan either.
Anybody brave enough to test this?
I tested one fan on my batch 8 which only took 1200W from wall but it was about 70C at 20C room with fan at full speed and I didn't have balls to run it that high temp.
Batch 16 April fool miner??
Batch 16 warranty:
"3. In some cases, the warranty will be void
c. Burnt parts on hash boards or chips"
March 31, 2016, 05:29:30 PM
How did you remove the original epoxy though? Looks like you can easily damage the chip if you apply too much force.
March 31, 2016, 04:45:08 PM
how difficult was it to remove the heatsinks ? might use custom waterblock with chilled water running thru the blocks. heh.
March 31, 2016, 04:05:54 PM
Probably going to be impossible to re-glue any heatsinks that fall off.
No, i did that before on my B3 4.86, i made a thermal glue with AL2O3 from reading orginal elecolit MSDS.
if you want to know how is that, i can provide pictures again
it tooks 4 days, 54 chip re pasting is very hard work.
like that , this is my thermal paste 6 times higher thermal conductivity from bitmains black shitty epoxy. 3 times higher then B1 white epoxy.
and also i remove chip cover too.
https://bitcointalksearch.org/topic/m.13230506
https://bitcointalksearch.org/topic/m.13478078
March 31, 2016, 03:53:53 PM
Probably going to be impossible to re-glue any heatsinks that fall off.
March 31, 2016, 03:14:59 PM
Finally i removed heatsinks from my B2 4.66 575Mhz S7 nonworking hashboard,
i will clean up soon but i seen very very strange thing on this board.
2 chip pins(14-15) (28-29) are soldered to PLL GND.
this pins are NRST_A and RST_N RF and Test pin.
-this chips always reset on TEST mode , that means disabled...
-Why 2 chips are disabled on 4.66 S7 ??
-how can cgminer see this chips like that "o" OK not "x" or "-" when these are disabled ??
-i check routing for pcb production problem but other chips not wired to gnd..
(white paint is boron nitride for dust and thermal conductivity forcer and also use for shortcircuit protection from heatsink contact)
so, any ideas ? (i think i found a HCN "hash counter" stopper for dead chips) Big MAYBE
i will clean up soon but i seen very very strange thing on this board.
2 chip pins
this pins are
-this chips always
-Why 2 chips are disabled on 4.66 S7 ??
-how can cgminer see this chips like that "o" OK not "x" or "-" when these are disabled ??
-i check routing for pcb production problem but other chips not wired to gnd..
(white paint is boron nitride for dust and thermal conductivity forcer and also use for shortcircuit protection from heatsink contact)
so, any ideas ? (i think i found a HCN "hash counter" stopper for dead chips) Big MAYBE
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