Official Thread: AMT

[AMT_miners]

Thanks for posting images of your rig.

[rik_khaos]

So is it the ribbon itself that will be the issue? Can it be easily fixed or should I just wait until the one I have on order arrives?

So it doesn't seem to be a power issue.

[AMT_miners]

So is it the ribbon itself that will be the issue? Can it be easily fixed or should I just wait until the one I have on order arrives?

So it doesn't seem to be a power issue.

We can fedex you out a new one on Monday if you'd like. Also in your previous images you had an adapter going from the 4 pin molex to the back plane, can you check if that's properly secured. In similar situations, we've seen clients get a can't connect to cgminer error message when there is no power being distributed through the back plane.

[loshia]

Guy'
Is there any one who received UNsmashed unit And was able to make it work?
?
I guess that amt shipped the non working crap to you as DIY kits so you are the only one to be blamed that something is wrong.because it is not complete product, because of power and cable issues and so on
aMT
It is about time to show a working unit as long as you are shipping , do not you think so
And some power measurements of course

[AMT_miners]

Hold on a second Loshia before you scare everyone with your provocative statements.

Yes we've said that " Now We are in distress, and may need some help from the community".

But you're contribution has been anything but that, and our miners work fine and you should be the first one to know that and admit that of course. 

[chlangyue0168]

I am order #690 and #691 how about my 1.2T AMT miners

[rik_khaos]

So is it the ribbon itself that will be the issue? Can it be easily fixed or should I just wait until the one I have on order arrives?

So it doesn't seem to be a power issue.

We can fedex you out a new one on Monday if you'd like. Also in your previous images you had an adapter going from the 4 pin molex to the back plane, can you check if that's properly secured. In similar situations, we've seen clients get a can't connect to cgminer error message when there is no power being distributed through the back plane.

I have it on there as tightly seated as possible, but I have a few of the adapters so I can switch it out and just generally re hook it up to ensure there is a good connection. If you can ship me a new cable on mnday that would be great, I'd appreciate it.

I switched out the adapter and made sure both ends were tightly seated so there should be no issue with power there. If you think it is a faulty backplane feel free to send me one of those as well and I'd be happy to ship this backplane back when I receive the new one.

[rik_khaos]

So is it the ribbon itself that will be the issue? Can it be easily fixed or should I just wait until the one I have on order arrives?

So it doesn't seem to be a power issue.

We can fedex you out a new one on Monday if you'd like. Also in your previous images you had an adapter going from the 4 pin molex to the back plane, can you check if that's properly secured. In similar situations, we've seen clients get a can't connect to cgminer error message when there is no power being distributed through the back plane.

Perhaps for another revision on the backplane you include some sort of led indicator that lets us know it is properly receiving power. just food for thought.

[freddyfarnsworth]

it is real hard to tell from the pic's but it almost looks like the heatsink's are drilled and tapped 10-32 and 8-32 screws.
TOOTS how good of a fit are the screws in the threaded holes? are they a sloppy fit or do they seem pretty close and smooth?

The screws that are present securing the blades in the chassis seem tight and secure.

The screws that are securing the heatsinks seem tight and secure as well.

The screws that are holding the cooling fans are tight and secure except for one which just fell out.

More pictures and details as I try to get this pile to hash.

Not one bit of guidance from AMT. No instructions included.

Hello Toots !

Hey one of the backplanes has some bent pins in the pix. I am sure you saw em, but if not they will short if just crammed in to the blades.

[freddyfarnsworth]

So is it the ribbon itself that will be the issue? Can it be easily fixed or should I just wait until the one I have on order arrives?

So it doesn't seem to be a power issue.

26pin IDC ribbon, got any real electronic shops around ?
Recrimp it with pliers carefully if you wish to attempt repair.

PS another thought, the red wire (pin1) is correct polarity ? cable could have been flipped before crimping.

[timmyd]

its day 2 of attemting to get my rig running correctly. ill add tht also on arrival of my miner i noticed the bend in the cage and i think its suppose to be there. although i have bent copper heat sinks on some of the a1 chips.

[freddyfarnsworth]

its day 2 of attemting to get my rig running correctly. ill add tht also on arrival of my miner i noticed the bend in the cage and i think its suppose to be there. although i have bent copper heat sinks on some of the a1 chips.

While you are at it, throw up a pix of the ribbon cable that works on yours, need to see what side the red wire is on.
It may help rik.

Thank You

[rik_khaos]

its day 2 of attemting to get my rig running correctly. ill add tht also on arrival of my miner i noticed the bend in the cage and i think its suppose to be there. although i have bent copper heat sinks on some of the a1 chips.

I had one only one bent prong on my of the copper heat sinks on the top most board. I'm hoping it didn't konch the chip out of whack.

are the connectors both supposed to be facing up or should one be up and one be down?

I have one facing up and one facing down. it causes the cable to have a stupid twist to it when I plug it into the backplane and main board. edit: When I tried put the connector back on the ribbon I put it on backwards. It was doing the crazy twist thing from the beginning.

[timmyd]

My ribbon does have a twist due to how it connects to the bp. can see the red side of the ribbon in this photo if it helps

[freddyfarnsworth]

More PowerSupply Rail info, if you do have one of these multi rail jobbers you can puzzle it out.
Corsair HX series single rail does not shut down from ripple, it is way to heavily built for that, you can weld with them. $$$ also.

==========


Quote from: Hark33 on April 12, 2014, 08:26:23 AM

Hello,
I have technical problem with 1 TH/s Desk.
I received 2 1 TH/s Desks yesterday.
I'm using 2 1600W Lepa power supply.
Miners firstly turn off after 5 minutes, I saw, that 1 original fan was set to air flow in, one to air flow out. A set both fans to IN. So now it working for approximately 30 minutes, then one temperature sensor reach 50 degrees - miner shut down. I have miners in room, where is 21 degrees. So I add 2 fans at front side, now it working for 1 hour, but its not a lot.
So, where is a problem? I must put it to fridge?
---
This is the same issue we observed with the Platimax 1500W: some PCIe connectors share the same rail, with that you are feeding two hashing units over the same rail and overloading it - the Platimax uses to shut down after a while. Since the Lepa's PCIe pinout looks similar to that one, here is the correct way to set up your CCD with the chosen PSU:

1) take a look at bottom of datasheet page 2 (http://www.lepatek.com/files/LE_ProductBasic_eng/PB_File/G1600-EN.pdf)
2) notice that the distribution of the 6 12V rails is as follows: 12V1:MB, 12V2:MB, 12V3:PCIe1+4, 12V4:PCIe2, 12V5:PCIe5+6, 12V6:PCIe3
3) ensure that you connect 4 hashing units to PCIe connectors 1, 2 , 3, and 6 (left 4 and 5 unconnected)
4) buy or build yourself an adapter from MB-20 (12V1) or MB-16 (12V2) connector to PCIe and feed the 5th hashing unit with that

Bottom line: ensure to feed only one hashing unit through one 12V rail. Even if the PSU uses a common rail, powering two hashing units through a single rail will either cause voltage ripples or over-current protection shutting down the PSU.

Good luck

Thanks a lot Zefir, you have right!

I did it exactly how you said, I connected 4 hashing units to separate PCI-E rails and then I modified CPU power supply connector to PCI-E connector, now working stable!  

Thank you very much again

[freddyfarnsworth]

My ribbon does have a twist due to how it connects to the bp. can see the red side of the ribbon in this photo if it helps

Thanks that should be helpful !

[rik_khaos]

I'm too sick, tired, and medicated to work on this. Maybe in the morning I can run to the electronics shop down the street and just see if they have a cable in. I saw like every number but 26. I did see 36 so I could just peel 10 away I imagine. and the connectors are $.70 cents for two. Then I just go to their tech area and see if they can't crimp that on proper for me. if they don't charge more than the crimping tool I'll do it.

That way if it's no the cable I can move on to what ever other issue it could be.

[timmyd]

goin to try and use mellorbos/regtables back plane and ribbon on my machine and see if that sorts my issue. and also try my corsair rm1000 on their setup and see if it sorts there power issues out. results posted in a bit hopefully

[rik_khaos]

goin to try and use mellorbos/regtables back plane and ribbon on my machine and see if that sorts my issue. and also try my corsair rm1000 on their setup and see if it sorts there power issues out. results posted in a bit hopefully

you are all running the 520's right?

[timmyd]

goin to try and use mellorbos/regtables back plane and ribbon on my machine and see if that sorts my issue. and also try my corsair rm1000 on their setup and see if it sorts there power issues out. results posted in a bit hopefully

you are all running the 520's right?

yes pal 3 boards