ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 29.

-droid-

legendary

Activity: 1050

Merit: 1001

Quote from: Cyper_BLC on March 31, 2016, 03:05:54 PM

Quote from: adaseb on March 31, 2016, 02:53:53 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. Wink

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. Cheesy

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

scyth3

sr. member

Activity: 490

Merit: 251

That area in the middle gets no airflow.

mavericklm

hero member

Activity: 742

Merit: 500

Looks only like a very poor photographer's job! crap lighting....

aarons6

legendary

Activity: 1736

Merit: 1006

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.

mavericklm

hero member

Activity: 742

Merit: 500

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).

Maybe you should have saved the pic!

NotFuzzyWarm

legendary

Activity: 3822

Merit: 2703

Evil beware: We have waffles!

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. Huh

Looks rather 'well-tested' to me....

generalt

legendary

Activity: 1096

Merit: 1021

Quote from: citronick on March 31, 2016, 12:27:28 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 Grin

Looks like the blow/pull fan is removed to me.

Cyper_BLC

sr. member

Activity: 490

Merit: 270

Reverse Engineer

Quote from: notlist3d on March 31, 2016, 05:10:59 PM

Quote from: SLEI on March 31, 2016, 05:01:15 PM

Quote from: generalt on March 31, 2016, 06:54:02 AM

Quote from: HagssFIN on March 31, 2016, 06:47:04 AM

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.

Anybody brave enough to test this? Cheesy

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 Roll Eyes

second and last improved version Wink

notlist3d

legendary

Activity: 1456

Merit: 1000

Quote from: SLEI on March 31, 2016, 05:01:15 PM

Quote from: generalt on March 31, 2016, 06:54:02 AM

Quote from: HagssFIN on March 31, 2016, 06:47:04 AM

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.

Anybody brave enough to test this? Cheesy

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.

SLEI

member

Activity: 84

Merit: 10

Quote from: generalt on March 31, 2016, 06:54:02 AM

Quote from: HagssFIN on March 31, 2016, 06:47:04 AM

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.

Anybody brave enough to test this? Cheesy

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"

adaseb

legendary

Activity: 3808

Merit: 1723

How did you remove the original epoxy though? Looks like you can easily damage the chip if you apply too much force.

yslyung

legendary

Activity: 1500

Merit: 1002

Mine Mine Mine

how difficult was it to remove the heatsinks ? might use custom waterblock with chilled water running thru the blocks. heh.

Cyper_BLC

sr. member

Activity: 490

Merit: 270

Reverse Engineer

Quote from: adaseb on March 31, 2016, 02:53:53 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. Wink

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. Cheesy

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

adaseb

legendary

Activity: 3808

Merit: 1723

Probably going to be impossible to re-glue any heatsinks that fall off.

Cyper_BLC

sr. member

Activity: 490

Merit: 270

Reverse Engineer

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. Huh

-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

AriesIV10

legendary

Activity: 1260

Merit: 1006

Mine for a Bit

Quote from: not.you on March 31, 2016, 12:35:22 PM

The picture just shows the suck.

Haha - The picture and the website say it is the same fan (Cooling: 1x 12038 fan-same as Batch 15) which should ~ 182CFM @ 4800RPM, but the firmware says 6000 which would be considerably more and hopefully less wattage.

not.you

legendary

Activity: 1726

Merit: 1018

The picture just shows the suck.

yslyung

legendary

Activity: 1500

Merit: 1002

Mine Mine Mine

Quote from: citronick on March 31, 2016, 12:27:28 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 Grin

they want to BLOW & don't want to SUCK ! heh

depends how u look at it though, blow to chips but it can be sucking cold air in too but blow the hot air out

citronick

legendary

Activity: 1834

Merit: 1080

---- winter*juvia -----

the S7 fan design is a "suck air" + "blow air" method, no?

which fan are they removing?

sucking or blowing one?

no punt intended Grin

notlist3d

legendary

Activity: 1456

Merit: 1000

Quote from: yslyung on March 31, 2016, 08:55:13 AM

Quote from: citronick on March 31, 2016, 08:11:26 AM

that many chips with 1 fan??? they're mad.
even with 2 fans - the amount of heat pushed out is quite substantial.
obvious that they are cutting corners now

S7-20160316-700M-1 fan-6000.tar.gz thats the latest FW ...

6000 means 6k rpm fan Huh

hmm afaik max prolly 5k rpm for fan of that size.

normal s7's (earlier batches) will not run if it only detects 1 fan, but have seen EXCEEDING 880deg C & causing miners to auto shutdown.

me thinks mid 70 deg C is still "ok" but exceeding 80C is a little too high.

afaik, chips are rated up to 125 deg C. thats only the chips but other components ? hmmm

most electronic components can take up to 880 C but if more, i smell trouble.

thoughts ?

I think leads to problems as you have only one fan working.... no backup. So if there is a failure it's going to get hot.... and you are counting on it detecting it and turning off. The thought of a S7 with no fans running scares me personally.

I would only run 1 if temporary and had another fan on the way, also I would be watching heat like a hawk. I think 1 fan sounds like a bad idea.

Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 29. (Read 528055 times)