Topic: Official Thread: AMT - page 17. (Read 678353 times)

Any computer power supply is isolated from the AC to DC side, so there is no issue with connecting multiple outputs in parallel as long as the voltages are the same and they share current nicely. Even that doesn't matter for this application as you can run one PSU to a couple boards and another PSU to the rest without even joining the 12V lines. The one issue you can have to watch out for is that some supplies (especially server ones) have the output ground tied to the case, so if you're trying to connect two in series they can short out if you touch the cases together.

This is only true for group regulated power supplies. Thankfully they're becoming less common and are almost unheard of in a modern high power PSU. Pretty much anything in the 800W+ range or Gold rated will use a single 12V rail and then use DC/DC to get the minor rails. You mostly only have to worry about this in smaller budget PSUs usually of the bronze variety, like the popular Corsair CX series.

+1  Agree... utterly useless.

+1

Whatever the case it still does not release them from the obligations of what they have already stated. I am expecting a tracking number myself today as it is the end of the week (work week).
While I wish Jim well, there are other people in the company who can handle whatever it is needs handling. I think people would be more forgiving if it was a solo operation or the first time there was a delay. But that is not the case.

Congrats!
Will you be so kind to post 24 hour pool chart of miner performance at some point?

10x Phinn

There was a guy in the office that went by the name Jim Brown, and even referred to Josh as his brother while we were having a smoke outside (just recalled that I probably did pen such), but I never asked for, nor seen any ID. Same true for the Rob dude that was there.

My guess is that there were both there to also act as body guards, even though I arrived alone and had no qualms with walking into some strange office late at night to meet up with three dudes, one of which probably despised my guts.

Jim Brown(?) seemed pretty healthy to me, but I guess a heart attack is possible if one consumes too many Red Bulls. For some reason I don't believe the clan does drugs, so maybe be able to rule that out.

That said, I'm leaning heavily toward this being a ruse.

Phinn,
Are you saing that most probably there is no Jim at all?

As I said all depends how is your home wired and grounded.
But you can experiment with it
However if your home is a server room and it is wired and grounded properly there is nothing to fear of

I'm going to have to hunt down that post I made where I stated that I had a smoke with Jim(?). It is true that I did, but at this penning I don't recall stating such.

EDIT: I do recall stating such.

Actually, there was a kid (meaning younger than Josh Zipkin) when I visited that went by the name Jim Brown, but I didn't have the privilege to see his, nor anybody else's ID.

According to our (Josh and I) conversations, with Jim(?) sitting next to him, Jim didn't even frequent this forum, let along post under the AMT_miners account. Jim Brown(?) supposedly only handled the tech aspect at the facility(s), leaving the convos to Josh, et al.

The way it reads to me is that Joshua Zipkin, CEO of AMT, is just trying to pull a rabbit outta his hat, possibly so he would longer have to reply to any tech support questions as the miners are supposedly in route to their couple dozen or so customers.

Remember, this is probably in the Jewish Bulgarian Freemasons Gimp Bastard's playbook.

Grounded plugs (|.|) can not be "rotated 180 deg". Nor can EU plugs (-|). Nor can most standard US non-grounded plugs (! |) {narrow prong, wide prong} {Even still, the rectifier isolates + from -, adding the - to the ground. The PSU will not start otherwise, it would fault.}

+12v is +12v on the output of every PSU, ground is ground on every PSU.

Dual PSU's are common, and standard, especially in servers. If it was an "issue", you couldn't touch one PC to another, or power one device from a wall-wart, that was plugged-in to your PSU... like um... USB-hubs, external drives, network cards, high-speed modems. They do not use full isolation, they all share a common ground, and have independent voltage inputs.

These simplify the process of adding multiple PSU's to one source... They usually have a relay on the 5v rail, which doubles as the 5v load too.
http://www.frozencpu.com/cat/l3/g12/c133/s1513/list/p1/Accessories-PC_Tools-Multi_PSU_Adapter-Page1.html

Here is a nice write-up...
http://www.extremetech.com/computing/91808-add2psu-how-to-combine-multiple-power-supplies-in-a-single-computer

Still no tracking number....

Fedex tracking says "On FedEx vehicle for delivery"

Not the case dude
The real problem is mixing psu grounds and results can be amazing depending how your home is wired and if power plug is rotated at 180 degrees and so on and on
Short story do not do it
Long story ask someone who do you trust and knows that stuff for detailed explanation
I have gone to all of this and have bitter experience. No mater if it seems done right a lot wired things are about to happen. Trust me unless it seems useless to you also
Ps did I read it right ?
 120 amps for 5 cards at 12 v?
Which makes ?? At the wall
Nice
I guess 500 to 700w max
Ok I am a jerk let us make them 900w

Remember, if you do use 2 PSU's... you WILL need something on both PSU's to give the PSU a 5v load. Without something on the 5v rail, the 12v rail will not have a reff-voltage to stabilize correctly.

EG, plug an old CD-Drive or Floppy-Drive or any other device into one of the standard MOLEX (four prong "oooo" cables.) For the AMT unit PSU, this would be the raspberrypi as the 5v load. For the other PSU, you will need another device. (Find a nice 5v LED-light display, and you have a cool load to light-up the cards. )

P.S. An external 12v fan, will not work, as it does not use the 5v on the molex connections, though it may have a wire on the plug, it is not actually connected to anything. (It will say 12v on the fans sticker.)

You know if you have power issues, because some boards will run at abnormal speeds. If you turn the unit off, and remove a board, and the remaining boards run normal... or better... then you are running into voltage issues. The PSU is not providing enough AMPs, while it tries to maintain the correct VOLTs. (Thus, the stated above solution, or you need a PSU with more AMPs on the 12v rails, to match the cards draw.)

When buying a PSU, you want to mind the RAILs and the AMPs per rail.

+12v/+12v (2 rails) *may not be split correctly for 5 cards, 2 @ 30a each (great), 3 @ 20a each (starved)
60a/60a

+12v (1 rail) *better for 5 cards, 5 @ 24a each (ok)
120a

NOTE: Without something on the +5v load, you may only have 50-80% of that amperage on the 12v rails. Voltage will actually drop to 10.5v-11.5v once the unit starts running, on the weak rail, in a multi-rail PSU. That, or it will remain 12v, but be lower available amps then expected. Only 30a-45a per rail, in the dual-rail setup mentioned above.

That is just an example. I will know more detail about each cards individual "ideal power consumption", as my unit arrives for testing.

If you are still reading it I said that you have to rewire your homes 200 pages ago. Check your fuses and all that useless stuff
So my useless advise for you is to be prepared for the glorious moment when you miner will arrive.
Because a I said it will not be able to pay for electricity very soon. Do not loose a precious time to reply me dude. Get ready for the arrival

Agreed, And I have done both. Likley just remove your posts but I will just put you on ignore. I had you on it until recently. Clearly you are still just as useless as before.

That is exactly what I said do not knowing Jim is a real person.
You can use google to translate it if you wish. And I clearly said that I do hope he gets better in most sincere way
However for me some things just do not go buy so I will say again and agin what amt are doing because they will continue to do it in the feature. Someday you can go back 200 pages and found my post staying here
Basically you have two options to get rid of me
1. Ask mods to ban me permanently
2. Use ignore button
3 both one and two

1ps what about your power supplies dude?
I can assure you that I can and will help every one of you te make their famous miner work if that is doable at all

Bottom line the question is why are you even here any more? They are delivering to their customers if late. Its not an ideal situation to be in for anyone but they are working to deliver at this point. If your original intent was to point out they are frauds, then you have failed. They are real as a company. They are delivering product even if slowly. I dont want to go stepping up to bat for AMT, as they have mismanaged the situation, BUT hopefully with things as they are now and them apparently hitting rock bottom, they can turn it around and maybe come out of it a better company in the future. For now I think everyone just wants their product and put this whole saga behind them. Having people like you pop in with nothing to contribute AT THIS POINT, just makes this process much harder for everyone. You are not a customer, your use as far as this thread goes to expose them is pretty much done with.  I think EVERYONE here already knows how AMT is. And those of us who are customers mostly just want this situation over with to both ours and AMTs mutual satisfaction. You are just now actually now just saying useless nonsense and wishing death on people. And don't say you didnt because you clearly said everyone gets what they deserve. If you think you didnt maybe you need to check with google translate to see exactly what you are saying and how it is being taken. But I am sure it roughly translate the same way in bulgarian as well. And in case you think you said something else I did the legwork and translated it into bulgarian for you. Bceки пoлyчaвa тoвa, кoeтo зacлyжaвa. That is what you are saying in context. Which pretty much is wishing Jim (or AMT people) to die if you read the previous post as well in context.