Some random thoughts on avalon 6 antminer s-7 and j4bberwock/finksy boards

jstew

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i have never had an issue with the 2880w boards except for 1 board and it was an early one ( green pcb)

the only sockets i have burnt were on neptunes but never on the breakout boards the green board was the only exception , i hang my psus out the end of the shelf slightly so the air can flow around both sides of the breakout board

with ur burnt breakout sockets id have to wonder if u had bad connections on the pci-e cable to socket or wire to the pin

HerbPean

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I'm making some change at home and i will be using two 4K DPS breaking board with the DPS-2000.

Last time I red this thread I took a good look at all my cable and the breaking board and none was overheating then come the summer. I made some change two days ago and I had to change 5 cables.

2 was in bad shape with brownish yellow cables and the connector was also affected at the board side but nothing miner side.

So I should have added some extra air flow on the breaking board and it would probably not happen.

So now I have some brownish connectors on the board side. I don't see any modification to the connector form, even with the worst one. Just sucks to see that.

So beware and add some extra air flow to the breaking board if you're room temps is getting hot for a long period of time.

rockyforever

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Quote from: philipma1957 on April 01, 2016, 12:04:50 PM

Quote from: rockyforever on April 01, 2016, 09:51:16 AM

Quote from: sidehack on March 31, 2016, 01:48:44 PM

Stable? I wish the S7 was stable. Every day I have to reboot a bunch of machines that hung either for a 30-second loss of pool connection or, well, just because they felt like hanging.

I bought a few of the early versions and they seem to hold well (above 30 days for most before a restart) but the later versions seem to have the issues

my batch 2 is a simply outstanding miner.

I can get .248 watts a gh and run the freq at 631 giving 0.0005% error rate

this one was rated at freq 575.

my batch 1 sucks still sucks and is lucky to do 4200gh with 0.1255 error rate.

both still run

batch 2 for 8 months
batch 1 for 9 months

Ya I have a batch 2 and 7 that seem to run perfectly

philipma1957

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'The right to privacy matters'

Quote from: rockyforever on April 01, 2016, 09:51:16 AM

Quote from: sidehack on March 31, 2016, 01:48:44 PM

Stable? I wish the S7 was stable. Every day I have to reboot a bunch of machines that hung either for a 30-second loss of pool connection or, well, just because they felt like hanging.

I bought a few of the early versions and they seem to hold well (above 30 days for most before a restart) but the later versions seem to have the issues

my batch 2 is a simply outstanding miner.

I can get .248 watts a gh and run the freq at 631 giving 0.0005% error rate

this one was rated at freq 575.

my batch 1 sucks still sucks and is lucky to do 4200gh with 0.1255 error rate.

both still run

batch 2 for 8 months
batch 1 for 9 months

rockyforever

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Quote from: sidehack on March 31, 2016, 01:48:44 PM

Stable? I wish the S7 was stable. Every day I have to reboot a bunch of machines that hung either for a 30-second loss of pool connection or, well, just because they felt like hanging.

I bought a few of the early versions and they seem to hold well (above 30 days for most before a restart) but the later versions seem to have the issues

rockyforever

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Gotcha Philip,

thank you for explaining!

philipma1957

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Quote from: rockyforever on March 31, 2016, 01:37:58 PM

Philip great review.

Honest question though, why are still promoting group buys of the Avalon 6 with the known issues. You have the connections and people to be able to get the necessary items to counter the issue but others don't unless it is being offered to others? The Avalon 6 is quiet but hashes under the S7 by 1ths and the S7 for the most part has been stable, even though loud, but doesn't have a known fire hazard. I am just thinking that unless additional connectors are added to the design, Avalon should be holding sales unless a solution is found or the issue is stated on the description. Just thinking out loud....

The group buy was shut down when bitmaintech dropped prices and gave out 100$ coupons.

Every group buy I did the avalon 6 sold at a lower price then the s-7 the day we did the sale.

The s-7 got very competitive in price with the 100 usd coupons. so I stopped the group buy.

as for one avalons being bad gear and s-7's being good gear they both have lots of flaws.

I run 7 avalon 6's

2 on a 2880 break out board with sidehacks cable mods 0 issues
1 on a 1200 watt platinum seasonic using 18 awg cables 0 issues
1 on a 1200 watt gold fsp aurum using 16 awg cables 0 issues
1 on a 1200 watt gold ocz using 16 awg cables 0 issues
1 on 2 psus a silverstone 700 watt titanium psu and a 1000 watt corsair rm 1000 gold 0 issues
1 on 2 psus a 650 gold seasonic with 18 awg cables and a 1000 watt fractal platinum with 18 awg cables 0 issues

So I don't consider the avalon 6 to be bad gear. think of a sports car that needs high octane gas. and the 2880 breakout boards are not high octane gas as the jacks struggle when you do avalon 6's

now to be fair maybe all the other psu's will fail like the 2880 breakout board failed I would then say that the avalon 6's really have a problem.

HerbPean

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Quote from: rockyforever on March 31, 2016, 01:37:58 PM

Philip great review.

Honest question though, why are still promoting group buys of the Avalon 6 with the known issues. You have the connections and people to be able to get the necessary items to counter the issue but others don't unless it is being offered to others? The Avalon 6 is quiet but hashes under the S7 by 1ths and the S7 for the most part has been stable, even though loud, but doesn't have a known fire hazard. I am just thinking that unless additional connectors are added to the design, Avalon should be holding sales unless a solution is found or the issue is stated on the description. Just thinking out loud....

Phill is just saying that he had an issue with a breaking board AND the fact that the AV6 has only 2 PCI-E connectors per board. Each connector suck around 275w. 3 connectors would lower the power per connector and do not stress the PCI-E connector and cable as much as the current version of the hashing board.

I looked into my 4K IBM breaking board for sign of overheating an I saw none but it is also getting hotter where I am, we shall see.

That said, my overall confidence in the AV6 is way higher then the S7 ... Especially with the new 1 Fan version Batch 16. I wanted to change my old S4 with a new S7 but I guess I will wait or buy an older used version.

sidehack

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Curmudgeonly hardware guy

Stable? I wish the S7 was stable. Every day I have to reboot a bunch of machines that hung either for a 30-second loss of pool connection or, well, just because they felt like hanging.

rockyforever

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Philip great review.

Honest question though, why are still promoting group buys of the Avalon 6 with the known issues. You have the connections and people to be able to get the necessary items to counter the issue but others don't unless it is being offered to others? The Avalon 6 is quiet but hashes under the S7 by 1ths and the S7 for the most part has been stable, even though loud, but doesn't have a known fire hazard. I am just thinking that unless additional connectors are added to the design, Avalon should be holding sales unless a solution is found or the issue is stated on the description. Just thinking out loud....

HerbPean

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I sent a PM to Jabber about the 2880w breaking board problem you had Phil.

He didn't log since March 11, so I haven't receive an answer.

This is strange ... Jabber is usually active around here.

sidehack

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Curmudgeonly hardware guy

Most server PSUs have, either internally via a trimpot or externally by manipulating remote sense lines, a means of adjusting the output voltage within about an 11-13V range. Not sure if you were using a server PSU, but a screwdriver and a bit of research might have saved you quite a bit.

talks_cheep

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I've had pci-e jacks on S5 and S7 miners go brown or worse. Mostly because the PSU I was using produced close to 13 volts unloaded, don't know the exact voltage when loaded. Lost an S5 and a couple of S7, due to flameout. Switched to better psu with 12.3 volts unloaded, no more browning or flameouts.

philipma1957

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Quote from: sidehack on March 26, 2016, 07:41:19 PM

It's designed to work with DPS800 and HP Common Slot (so DPS1200 family). I thought you had a bunch of those, including the 1200 Platinum-rated.

I used to but I sold it off with one of my sp20's

I have some ebay ebucks and would buy it again is the one below the right one?

http://www.ebay.com/itm/HP-Proliant-DL580-G5-438202-002-DPS-1200FB-1200W-Power-Supply-/291700007037?

sidehack

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It's designed to work with DPS800 and HP Common Slot (so DPS1200 family). I thought you had a bunch of those, including the 1200 Platinum-rated.

philipma1957

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Quote from: sidehack on March 26, 2016, 06:26:24 PM

Hey Phil - I just finished up one of my new DPS8/12 boards (though to give credit, it's pretty much entirely Novak's design, improving on a rickety old prototype of mine from last year). You want one to play with, see how it holds up to Avalon power and such?

sounds good but which psu do they work on?

as I have dps2000 and intel 2880 and intel 2980

do your boards work on this psu

http://www.ebay.com/itm/HP-Proliant-DL580-G5-438202-002-DPS-1200FB-1200W-Power-Supply-/291700007037?

as I have this one and not the one above

http://www.ebay.com/itm/IBM-BladeCenter-DPS-2000BB-Power-Supply-39Y7359-39Y7360-/141927111922?

I know it does not fit these two below

http://www.ebay.com/itm/IBM-BladeCenter-H-2880W-Power-Supply-W-Fans-43V7099-39Y7408-39Y7409-AA23920L-/151949289370?

http://www.ebay.com/itm/IBM-Bladecenter-Server-Computer-Power-Supply-2980-Watt-39Y7415-39Y7414-/231836146038?

sidehack

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Hey Phil - I just finished up one of my new DPS8/12 boards (though to give credit, it's pretty much entirely Novak's design, improving on a rickety old prototype of mine from last year). You want one to play with, see how it holds up to Avalon power and such?

philipma1957

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Quote from: vapourminer on March 26, 2016, 11:18:26 AM

im basically just commenting on sidehacks cables as i have no avalon or S anything and have extra seasonic x750s here for whatever miners may or may not be produced that i will buy.

those look pretty beefy. looks like more of sidehacks usual overengineered quality stuff.

might have sidehack do some custom cables for me.

they are 16 awg + 16 awg on the break out board side

they are stuffed into 1 plug on the avalon 6 side so they are 14 awg equivalent

vapourminer

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what is this "brake pedal" you speak of?

im basically just commenting on sidehacks cables as i have no avalon or S anything and have extra seasonic x750s here for whatever miners may or may not be produced that i will buy.

those look pretty beefy. looks like more of sidehacks usual overengineered quality stuff.

might have sidehack do some custom cables for me.

philipma1957

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Quote from: judypug1956 on March 26, 2016, 06:07:32 AM

What do sidehack's cables look like in action?

they are 16 gauge and they plug into 16 jacks on the psu side

on the avalon end 2 avalon 6's have a total of 8 jacks.

so 16 jacks merge into 8 jacks.

this setup draws 8.8 to 9.0 amps of 240 volt power. it is 40 f this morning

so 8.8 amps of 240 volt power = 2112 watts at the wall/ac

2112/7058 = 0.2992 watts at the pdu/wall

sp the 2980 is a true platinum psu
and these y cables 1 meter long allow the load on the breakout board jacks to run far cooler

as 2112/16 = 132 watts vs 2112/8 = 264 watts
i was lazy and used the ac watts I did not convert to dc

so 132 watts x .92 = 121.44 vs 264 x .92 = 242.88

So the 2880 /2980 breakout board seems to not be able to handle 242.88 dc watts very well
but it seems to do well with 121.44 dc watts

I have a lot of these psu's and boards so getting the custom wires works for me.

Topic: Some random thoughts on avalon 6 antminer s-7 and j4bberwock/finksy boards (Read 3490 times)