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

[philipma1957]

Suckssss, I have two hosting A6 using that breaking board....

Gotta need to find a better solution I guess. I'm running 3 on a double 2000DPS breaking board from Sidehack.

Do you think i'm gonna have the same issue with that breaking board ?

no sidehack has more copper.

I am have sidehack build me a set of test cables that should bypass the problem

once I get them I will demo and see if they work.

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[sidehack]

Not sure what you mean by a double DPS2000 board from sidehack - if you mean a single board that runs two PSUs, that's not one of mine. We thought of it a year and some ago but never had the resources to build it. If the board has PCIe jacks, it's not one of mine. The screw terminals on the boards I build are good for 250W per cable, and my DPS2K boards have a total of 14oz copper in the power traces so they should hold up pretty well. Leastways the test board held up just fine when we ran it at 196A draw for seven days in July heat. But again, if it's a double board it's not one of mine; I've only done single boards for that PSU.

I do have, within a couple weeks, a DPS800/DPS1200 board rolling out that'll take a dozen 6-pins. Should be just fine for an Avalon, and I've had an S7 running on a test board for a month with no problems. I forget the copper thickness offhand, but it's probably something like 4oz per rail. Not the best, but it is spread out.

Phil, I should have those cables done up probably tomorrow or the next day. Depends on when I can get to it, but shouldn't take half an hour. I did some test pinning earlier and figured out how I want to do the doubles with 16AWG wire.

[HerbPean]

Not sure what you mean by a double DPS2000 board from sidehack -

Sorry for the confusion it's the one from Jabber

https://bitcointalk.org/index.php?topic=1308296.0

EDIt: I edited my post and I took a look of each connector, no burning on my side with that breaking board.

[philipma1957]

okay I have some good news on the j4bberwock 2880/2980 boards

they have 20 jacks and can run 2 s-7s using the 20 jacks and or 2 avalon 6's using 8 jacks

I have had sidehack build be custom 39 inch y cable

2 plugs go into the breakout board and  they merge into the 1 plug for the avalon.

so 8 jacks break out board to 4 jacks avalon 6

then 8 jacks break out board to 4 jack avalon 6

or 16  down to 8

what happens id the power on the break out board is spread to 16 jacks not 8 to run the 2 avalons

so each break out jack is doing 120 watts dc  10 amps  of 12 volt  maybe 130 watts dc 10.8 amps at 12 volts.

rather then doing  240 watts dc 20 amps of 12 volt maybe 260 watts dc 21.6 amps of 12 volt

so far all jacks dropped 15c in temp and this appears to solve the problem if you have

avalon 6's

I will post photos later today. 

At sidehack  these may be a good item for you to produce for owners of avalon 6's and j4bberwock 2880 boards.

[judypug1956]

 What do sidehack's cables look like in action?

[philipma1957]

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.

[vapourminer]

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]

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

[sidehack]

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]

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]

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]

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?

[talks_cheep]

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.

[sidehack]

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.

[HerbPean]

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.

[rockyforever]

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.... 

[sidehack]

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.

[HerbPean]

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.

[philipma1957]

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.

[rockyforever]

Gotcha Philip,

thank you for explaining!