New Official AMT Thread - page 77. | Bitcointalksearch.org

NotFuzzyWarm

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Quote from: xstr8guy on May 28, 2014, 12:52:33 AM

Quote from: NotFuzzyWarm on May 28, 2014, 12:23:15 AM

Quote from: mrpark on May 28, 2014, 12:21:12 AM

How many watts/Amp does the ant S2 take?

Has a 1000w Enermax Gold PSU in it and they claim less than 1,100w from the wall. Haven't measured mine yet. The PSU fan is running nowhere near max speed so maybe 1kw or less from the wall?

I hope you have a 1200-1300w backup PSU handy. You'll need that in a week when that underpowered Enermax craps out. While you're at it, get a backup micro SD card ready because when your PSU starts to cutout, it will continually scramble the cheap card that BitMain included with the machine.

Actually I have several 1,200w HP server psu's handy if needed. I'm really not a fan of PC style psu's onve you get over 750w or so. I've measured the psu voltage at the backplane PCIe plugs and is at 11.7v meaning the PSU is quite happy so far. Dinna know the sd card issue was related to the psu per-se. Good to know and look out for.

xstr8guy

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Quote from: NotFuzzyWarm on May 28, 2014, 12:23:15 AM

Quote from: mrpark on May 28, 2014, 12:21:12 AM

How many watts/Amp does the ant S2 take?

Has a 1000w Enermax Gold PSU in it and they claim less than 1,100w from the wall. Haven't measured mine yet. The PSU fan is running nowhere near max speed so maybe 1kw or less from the wall?

I hope you have a 1200-1300w backup PSU handy. You'll need that in a week when that underpowered Enermax craps out. While you're at it, get a backup micro SD card ready because when your PSU starts to cutout, it will continually scramble the cheap card that BitMain included with the machine.

NotFuzzyWarm

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Evil beware: We have waffles!

Quote from: mrpark on May 28, 2014, 12:21:12 AM

How many watts/Amp does the ant S2 take?

Has a 1000w Enermax Gold PSU in it and they claim less than 1,100w from the wall. Haven't measured mine yet. The PSU fan is running nowhere near max speed so maybe 1kw or less from the wall? Is a 4U rack-ready case and even ships with wings and rubber feet for your choice.
Seriously OT now... Geronimooooo!

mrpark

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How many watts/Amp does the ant S2 take?

NotFuzzyWarm

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Evil beware: We have waffles!

No doubt. Looks like Christmas in there with all them purdy green, red & blue lights blinking inside of it Cheesy

Only flaw with mine is that they sent a crows-foot 220v cord. Is used n Australia. Go fig. Since a regular 18ga comp cord ain't gonna do it for now I um, borrowed the 14ga one from our SEM that has a regular 115v end on it until some 16ga cords come in tomorrow.

Also no instructions of course so had to use their site to make sure not too different than the s1s's. Is simpler actually.
Damn. Off in the OT ozone again...

opieum2

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Quote from: NotFuzzyWarm on May 27, 2014, 07:52:18 PM

Hmm, S1's back up a bit @ 240USD, 7 underclocked to 140 each gives ya 0.98 TH nom with fair pwr use for a hair under $1.7k.... full speed just over 1.2TH with power use way more than the A1 at its worst. As in around 2.5-2.6kw based on my pharm of 9 all oc'd @ 190 eating 3.75kw...

Well, now 10

Very happy with my new s2. Costs more vs bunch of s1s but 1/3 the feed bill Cheesy

Still a pretty good heater. Would be nice to add another oh, 520 or so GHs to the pharm hint hint...

Wonder how the Technobit/Bitmine/AMT collaboration boards are doing? A lot of promise with that design last we saw and if packaged/powered/cooled right...

Yea no joke. I am also loving the S2s I got. The AMT experience I had almost soured a friend of mine on mining altogether until he saw the S2s and gone one of his own. He is sampling now and looking to get more hardware.

I am hoping they provide us with the technobits as replacements for this mess. They seemed to work and were well regarded for the most part.

NotFuzzyWarm

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Evil beware: We have waffles!

A good read on general proper thermal mounting and such http://www.onsemi.com/pub_link/Collateral/AN1040-D.PDF Deals largely with discrete devices vs chips but same rules apply. Note the thermal resistances of silicon tapes... not good.

NotFuzzyWarm

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Activity: 3752

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Evil beware: We have waffles!

Hmm, S1's back up a bit @ 240USD, 7 underclocked to 140 each gives ya 0.98 TH nom with fair pwr use for a hair under $1.7k.... full speed just over 1.2TH with power use way more than the A1 at its worst. As in around 2.5-2.6kw based on my pharm of 9 all oc'd @ 190 eating 3.75kw...

Well, now 10

Very happy with my new s2. Costs more vs bunch of s1s but 1/3 the feed bill Cheesy

Still a pretty good heater. Would be nice to add another oh, 520 or so GHs to the pharm hint hint...

Wonder how the Technobit/Bitmine/AMT collaboration boards are doing? A lot of promise with that design last we saw and if packaged/powered/cooled right...

NotFuzzyWarm

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Evil beware: We have waffles!

Quote from: mrpark on May 27, 2014, 10:31:50 AM

The two odd mining boards (two with copper heat sinks, (Other 3 board had black heat sinks)) they sent me, they do not power up at all. It seems they are just dummy boards. Ironically, these were the two boards that got "damaged in shipping" with the 20 pin connectors torn off and caps missing.... They might have well as send me a box of rocks for my $6,000. I believe I was set up, and believe I have evidence to prove it.

I am buying 1.4T miners for $2,500 now. I could almost buy 3 times the mining power for what I paid for this unit. Shame, shame, shame...

Ja the price drops per GH/S have been stunning. AMT and the other late companies really really missed their sweet-spot for pricing. Only ordered my AMT 520 in late Feb because at the time Ants were $1750-2k each for 180GH so it was 'a good deal'. Only a month later price on Ants began their plummet so got my 1st 2 @ $750 each as I moved on from seeing the AMT rig/kit was not happening for a while... Sad

Last I saw a week ago now s1s are like $250 on Amazon and just over $200 direct. Yeesh!
Bet this goes bye-bye as OT.. (it is)

opieum2

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Quote from: FrictionlessCoin on May 27, 2014, 11:12:11 AM

Quote from: opieum2 on May 27, 2014, 11:10:01 AM

Quote from: mrpark on May 27, 2014, 10:31:50 AM

The two odd mining boards (two with copper heat sinks, (Other 3 board had black heat sinks)) they sent me, they do not power up at all. It seems they are just dummy boards. Ironically, these were the two boards that got "damaged in shipping" with the 20 pin connectors torn off and caps missing.... They might have well as send me a box of rocks for my $6,000. I believe I was set up, and believe I have evidence to prove it.

I am buying 1.4T miners for $2,500 now. I could almost buy 3 times the mining power for what I paid for this unit. Shame, shame, shame...

Yea its a sucky feeling. I am now looking at the spondoolies since they dropped in price so dramatically. The 1.4 went down to 2795. The 5.4THs is about the same price as the 1.2Ths miners we bought from AMT. Just some perspective. Either way, it is what it is now and gotta try to turn this situation around for us whatever it takes.

Still have not been able to mine with my broken AMT miner, however given the Miner Protection Program (MPP), I hope to get back my $6,000 I paid for, regardless if the miner never worked.

Well let's hope the new business structure is up to par and gets us all back on track. The initial customers are the ones who have to benefit from this (those of us that got broken miners or none at all). It would be interesting to hear more about what this is and what it will entail for us.

FrictionlessCoin

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Quote from: opieum2 on May 27, 2014, 11:10:01 AM

Quote from: mrpark on May 27, 2014, 10:31:50 AM

The two odd mining boards (two with copper heat sinks, (Other 3 board had black heat sinks)) they sent me, they do not power up at all. It seems they are just dummy boards. Ironically, these were the two boards that got "damaged in shipping" with the 20 pin connectors torn off and caps missing.... They might have well as send me a box of rocks for my $6,000. I believe I was set up, and believe I have evidence to prove it.

I am buying 1.4T miners for $2,500 now. I could almost buy 3 times the mining power for what I paid for this unit. Shame, shame, shame...

Yea its a sucky feeling. I am now looking at the spondoolies since they dropped in price so dramatically. The 1.4 went down to 2795. The 5.4THs is about the same price as the 1.2Ths miners we bought from AMT. Just some perspective. Either way, it is what it is now and gotta try to turn this situation around for us whatever it takes.

Still have not been able to mine with my broken AMT miner, however given the Miner Protection Program (MPP), I hope to get back my $6,000 I paid for, regardless if the miner never worked.

opieum2

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Quote from: mrpark on May 27, 2014, 10:31:50 AM

The two odd mining boards (two with copper heat sinks, (Other 3 board had black heat sinks)) they sent me, they do not power up at all. It seems they are just dummy boards. Ironically, these were the two boards that got "damaged in shipping" with the 20 pin connectors torn off and caps missing.... They might have well as send me a box of rocks for my $6,000. I believe I was set up, and believe I have evidence to prove it.

I am buying 1.4T miners for $2,500 now. I could almost buy 3 times the mining power for what I paid for this unit. Shame, shame, shame...

Yea its a sucky feeling. I am now looking at the spondoolies since they dropped in price so dramatically. The 1.4 went down to 2795. The 5.4THs is about the same price as the 1.2Ths miners we bought from AMT. Just some perspective. Either way, it is what it is now and gotta try to turn this situation around for us whatever it takes.

opieum2

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One of the biggest issues here with this is cooling. The heatsinks COULD withstand the heat (if they are properly applied) if the cooling is good. The problem here is there are ALOT of dead zones on the sides of the cards...card 5 from the beginning of the chain has no cooling flowing. That is a major issue with the cage design (I noticed this after I got mine). Right off the bat, you are looking at card 5 going down right away after it reaches its threshold.

Secondly we are dealing with the heatsinks themselves being the bare minimum to cool the chips. I am referring to the smaller heatsinks, the large one appears to be up to the task.

So the quality of the heatsinks needs to be improved, or larger heatsinks like the ones noted in previous posts. Fuzzys post on the custom made ones is a good one. I found some there that can be bought in bulk. These would be good options for AMT to explore. Obviously keeping costs down is a priority, but at the same time cutting corners at the expense of quality at this point is really not an option they can afford. Getting proper miners built with proper cooling dynamics is a priority (or should be if its not now) and working hardware which there are those of us contributing to making happen.

mrpark

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The two odd mining boards (two with copper heat sinks, (Other 3 board had black heat sinks)) they sent me, they do not power up at all. It seems they are just dummy boards. Ironically, these were the two boards that got "damaged in shipping" with the 20 pin connectors torn off and caps missing.... They might have well as send me a box of rocks for my $6,000. I believe I was set up, and believe I have evidence to prove it.

I am buying 1.4T miners for $2,500 now. I could almost buy 3 times the mining power for what I paid for this unit. Shame, shame, shame...

rik_khaos

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Quote from: NotFuzzyWarm on May 27, 2014, 12:08:24 AM

Quote from: rik_khaos on May 26, 2014, 10:44:31 PM

Quote from: NotFuzzyWarm on May 26, 2014, 05:48:31 PM

Quote from: rik_khaos on May 26, 2014, 05:34:15 PM

that is fair, I was asleep while it happened, so I didn't get the chance to see it all with my own eyes. All I know is it killed the fuck out of that board. I wish I would have copied the error cgminer was giving me.

I have a few sinks that are the same color as the sink that fell off perhaps I should remove and take a look at the thermal tape.

Aside from being copper or aluminum color doesn't really matter for the loads put on them. I suppose they could have different tape on them though, perhaps dots vs a square. (Hope not.) The anodizing on aluminum sinks is just ascetics. If ya wanna get picky, flat black is best with measurably but still marginal better radiative dissipation..

Definitely check/re-tape the chipsinks and even better find something bigger to use.
Definitely make sure there is good airflow channeled over them as well.

What I mean is they were all copper, but they changed color due to the heat of the chips, http://www.eng-tips.com/viewthread.cfm?qid=194516 looks like it;s the oxidation process taking place at diffrent levels of heat.

I can snap some pics to show you what I mean if interested.

If the copper is changing then serious trouble and probably dead chips. Max die temp is 100c and it takes more than that to make copper start changing color... 150c will start to give a bronze ish luster, around 200 serious color changes start. Good link btw.

Yeah I have three cards with at least one serious color change including the card where the sink fell off. Each of those have cards have nearly every sink with with the bronzeish color. Two cards have retained their natural copper color, but they failed to ever initialize in the first place. If I can get those two cards up with the software details at least I'll have something to work with.

Looks like maybe the issue could have been dealt with if we were given the proper soft specs to work with from the get go

NotFuzzyWarm

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Evil beware: We have waffles!

Quote from: rik_khaos on May 26, 2014, 10:44:31 PM

Quote from: NotFuzzyWarm on May 26, 2014, 05:48:31 PM

Quote from: rik_khaos on May 26, 2014, 05:34:15 PM

that is fair, I was asleep while it happened, so I didn't get the chance to see it all with my own eyes. All I know is it killed the fuck out of that board. I wish I would have copied the error cgminer was giving me.

I have a few sinks that are the same color as the sink that fell off perhaps I should remove and take a look at the thermal tape.

Aside from being copper or aluminum color doesn't really matter for the loads put on them. I suppose they could have different tape on them though, perhaps dots vs a square. (Hope not.) The anodizing on aluminum sinks is just ascetics. If ya wanna get picky, flat black is best with measurably but still marginal better radiative dissipation..

Definitely check/re-tape the chipsinks and even better find something bigger to use.
Definitely make sure there is good airflow channeled over them as well.

What I mean is they were all copper, but they changed color due to the heat of the chips, http://www.eng-tips.com/viewthread.cfm?qid=194516 looks like it;s the oxidation process taking place at diffrent levels of heat.

I can snap some pics to show you what I mean if interested.

If the copper is changing then serious trouble and probably dead chips. Max die temp is 100c and it takes more than that to make copper start changing color... 150c will start to give a bronze ish luster, around 200 serious color changes start. Good link btw.

rik_khaos

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Quote from: NotFuzzyWarm on May 26, 2014, 05:48:31 PM

Quote from: rik_khaos on May 26, 2014, 05:34:15 PM

that is fair, I was asleep while it happened, so I didn't get the chance to see it all with my own eyes. All I know is it killed the fuck out of that board. I wish I would have copied the error cgminer was giving me.

I have a few sinks that are the same color as the sink that fell off perhaps I should remove and take a look at the thermal tape.

Aside from being copper or aluminum color doesn't really matter for the loads put on them. I suppose they could have different tape on them though, perhaps dots vs a square. (Hope not.) The anodizing on aluminum sinks is just ascetics. If ya wanna get picky, flat black is best with measurably but still marginal better radiative dissipation..

Definitely check/re-tape the chipsinks and even better find something bigger to use.
Definitely make sure there is good airflow channeled over them as well.

What I mean is they were all copper, but they changed color due to the heat of the chips, http://www.eng-tips.com/viewthread.cfm?qid=194516 looks like it;s the oxidation process taking place at diffrent levels of heat.

I can snap some pics to show you what I mean if interested.

NotFuzzyWarm

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Evil beware: We have waffles!

Quote from: opieum2 on May 26, 2014, 09:29:02 PM

Oh these heatsinks looks good. http://www.amazon.com/20mm-15mm-Heatsink-Dissipate-Cooling/dp/B008OTKSW4/ref=sr_1_84?ie=UTF8&qid=1401144038&sr=8-84&keywords=heatsink+15mm

Them's the ones! couldn't find them earlier tonight. Good size and good fin spacing so air moves well. Just glue the things on to be sure I'd say.

opieum2

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Oh these heatsinks looks good. http://www.amazon.com/20mm-15mm-Heatsink-Dissipate-Cooling/dp/B008OTKSW4/ref=sr_1_84?ie=UTF8&qid=1401144038&sr=8-84&keywords=heatsink+15mm

opieum2

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Also another thing I noticed that really requires work. Cooling. The fans in any configuration whether the 2 fan config or the 4 fan setup....wont be enough to cool one of the cards without a proper fan layout.

Topic: New Official AMT Thread - page 77. (Read 149453 times)