Hi, I have a new problem.


When I mine, one or two miners will decrease hashrate a day later.

I start at 24Mh/s and end up at 4Mh/s (or 9 sometimes), the only way to fix it is to close down the miner and re-open it.


Any suggestion on how to fix this?


Miner: RX 480 4gb running Claymore (latest) dual mining.

Crimson 16.9.2 ( or whatever the latest are), I've tried multiple drivers, no effect.

I know what happened.

PSU Failure, the other units didn't die because \#physics

Okay, so according to OP, he was running it all off of a DPS 4kw unit.

Red flag-ish here (you shouldn't run a singular rail across multiple systems), but let's keep looking.

"3 S9's"

Um....red flag, that takes up over 3800 Watts by Bitmain's numbers....so you're running the PSU at 95.6% and some change. HUGE RED FLAG

You should never run over 80% full load capacity on any power supply for Bitcoin mining (Constant load), power supplies aren't meant to run at >90% continuously.

So that sucker was going to fail....you know how these guys fail? Voltage goes crazy, either way up, or way down. Now typically the voltage drops and most times, this can be caught by a computer, which will shut down, but not a Bitcoin Miner, no sir....you know why?

Because #efficiency, that's what. People wanted more and more on smaller boards running at lower voltages at smaller manufacturing sizes.....so, we have buck converters.


You know what they do? They jump up the voltage. Up up up!

So your power supply begins to fail, the voltage starts to drop and the power doesn't change, remember, those thirsty boys need 3825 Watts!

But wait! The lower voltage means something has to increase, and that's the amperage.

Here it comes.......12V @ 1275 = 106.25 Amps (35.41 per buck converter).....now 11V @ 1275 = 115.9 Amps (38.63 per buck converter)

Poor mr buck converter's startin' to heat up, his coils are getting toasty, singing the enamel, but it's holding.

10 volts

Crap, Mr. Buck Converter's coils are getting red hot, the enamel is burning off....HOLY...............

Poor Mr Buck converter.

The wires all short, now that 4000 W power supply just became an ARC welder, He's blowing through the amperage required to weld 1/4 inch stainless steel!!!!!

KABLOOM! (ARC Flash) consumes everything in it's path.

But what about your other miners?

Why didn't they die?

The answer is they likely experienced some damage to their coils, but the miner that died saved them, electricity follows the path of least resistance, once that one circuit board started dying, it took it all.  (Replace "Missile" with "Voltage" and "Giant" with "S9"....tears man https://www.youtube.com/watch?v=SXy3f6f9DxI)

Sucks bro, but it happens when playing with fire. I used to run stuff near 100% until I learned about the 80% rule, burned up a PSU and nearly lost my motherboard. Sucks you have to learn this way though.

Try re-seating every connection.

Worked for me.

The S7-style boards are finicky.

Okay, I've seen this before.

1. Post pictures of the dashboard (the one showing hashrate and blade error messages)
2. Post pictures of your mining setup
3. Post Pictures of the faulty boards (close-up) DO NOT OPEN YOUR UNIT FOR THIS, IT WILL VOID THE WARRANTY, take close-ups from the outside, including the red LED near the power connectors.
4. Post Pictures of the controller board (also, don't open it) and see what lights are on.


Many people have complained before and it has typically been one of 3 things.
1. Improper settings/drivers
2. Improper setup (all power plugs need to be connected, DO NOT MIX POWER SUPPLIES!)
3. Improper usage (I've seen previous users who ran theirs outside, took pictures, then sent it off for warranty, when Bitmain called them out on the water damage and even sent back a makeshift repaired blade, then the user went ape)

I have been trying to set up a mining proxy to run on my raspberry pi.

For some reason my antminer just goes into armageddon mode when a pool goes down.

Half the time I have to manually turn of the miner and turn it on again.


Any suggestions?

I have a Batch 6, it is beeping.

The lights on the hashing boards flash right before it starts beeping.


The power draw from the wall is nominal (389 watts - typical for the miner not running).

The light on the front is red.

The temperature reported is 20C

I stopped the beeping by pressing and holding the button for a few seconds. My PSU power output is 12.2V, current power draw is 1121 Watts.

No X's, no other info, just beeping constantly while fan is at full blast.

I don't think 1300W is good enough for an antminer, especially when beginners are present.

I'm running 2 different power supplies (RM850 Corsair and Quark 750 Rosewill) and they're doing perfectly. My rig runs at about 1KW (Batch 6) and the PSU doing 2 hashing boards isn't even breaking a sweat (RM850).

I'm also monitoring power to make sure each PSU runs on less than 80% power.


But on to my question: What do you think about the new Batch 6 and Batch 8 miners, with the giant Buck Converter on it? What's the reason for this, and how might it affect efficiency and stability?

How are those temperatures on your miner? Does it perform better at slightly higher temps?

Mine tends to gain an extra 100GH when it runs around 55C. I haven't tried going for below 50C yet though.

Please post your results, there are a lot of frequencies and setups, so please post the following in this format.



Batch: Batch#
Frequency: Freq#
Hashrate: Hashrate#
Power consumption: PowerConsumption# (If possible)
Fan Speed: FanSpeedPercentage#
Avg Blade Temperature: TempInCelcius#
Hardware Errors Per Day: HWerrors#


For example:


Batch: 6
Frequency: 575
Hashrate: 3.82TH/s
Power consumption: N/A
Fan Speed: 35%
Avg Blade Temperature: 54C
Hardware Errors Per Day: 3/day

Does anyone have a spare coupon for Batch 4 or 5?

That reminds me, what PSU did you use Dogie? I'm looking at either getting one like yours or doubling up on a Corsair 850 modular psu (it weighs as much as a barge, I love it.).

Can a single 110V 15A outlet handle this? 


Thanks for your help!

-DM

It's down, but the user is still around.

They scammed: 1.78 BTC out of people.

https://blockchain.info/address/18gP5ahmxzcLx6q8fJUctGbwMDJAAsmXxo

They claimed their first victim!

https://blockchain.info/address/18gP5ahmxzcLx6q8fJUctGbwMDJAAsmXxo

The website is a scam! (BITMAINTEC.com is not Bitmaintech.com!)

The website coindesk.news is also a scam!



I can't report it to the mods for some odd reason :/

Just like everyone else, I'd like to get my hands on a unit.

Oh and please keep your political arguments out of this thread, it's for SFARDS Announcement!

Glad to see you guys are still active. Hopefully we can see some of the assembled units sometime.

What is important in such a device is the controlling software.

As seen with the previous gridseed hardware, if one side is significantly more efficient than the other, it will be primarily used and the other will be ignored.

This will add problems since the most ideal solution would be to run one at full speed and the other at a reduced clock rate and speed, if both sides are separate enough, than this can be solved using a well designed board with a wide range of voltage control. However, this also leads to more component cost.

The device from SFARDS needs to allow for profit monitoring that closely follows the api from an exchange as well as the local power costs, I haven't yet seen this done well yet.

Hopefully the device is very efficient in the aspect of cooling as well, space-efficiency doesn't really matter as entire warehouses are typically partially filled since the power concentration is typically the larger issue.


What this all translates to is an ideal unit, such an ideal unit would be along the following

• Quiet
• Low Heat dissipation requirements
• Excellent Under clocking Potential
• Solid and Available Controlling/Driving Software

What many asic manufacturers forget is that for the average user (the one who pays  the larges, non-bulk pricing) does not want a loud unit, nor a compact unit that has extreme power requirements and/or industrial-type cooling requirements. Such a consumer would rather spend a few $'s or bits more to pay for the extra aluminum or better design to reduce the need for massive airflow. Longevity is key for these high paying customers, you can either taylor to short-term customers like mining farms, or play the long game and become a household name.

Both styles have risks, but I have yet to see a good household product for the average consumer. I'm tired of telling people "Not to mine" I wish there was a product that I could just hand someone and they could mine in under a day.

I know it's been said a lot, whether or not one wishes to review a miner, but ideally it should be done by Dogie first and foremost, secondarily, it should be done by average and newer users (perhaps DRKMSTR maybe? - insert Zoidberg Meme), what is important is that such a device is not only reviewed by a reliable reviewer, but reviewed by newer users who can introduce it to groups of average consumers and obtain feedback from them.

There is still a large market out there that nobody has tapped yet, but most miners are too loud to be accepted, or too expensive. This market is not only the average consumer, but a consumer whom most don't realize exist. (Hey, I need to keep a bit secret, otherwise anyone could market to these guys) Such a market is at my very doorstep.

Ultimately it will come down to Sfards to determine which market they want to cater to. I'll ask you one question, who's miners do you see more often, the ones designed for large mine usage, or the ones sold to the average consumer?

Fine I'll show off a bit: http://imgur.com/a/dGyUR - Raspberry Pi Node (Doge or BTC or Mining control) Completely custom case alternative designs include a fan too, but it's not as slick looking.

(Yes it runs as a full DogeCoin Node, the BTC node requires a bit of cooling so I'm holding off until I get another pi for that)

I like designing and printing a few hardware mods that alter the flow of air throughout the miner. It's a lot of fun.

I agree, but I'm a bit different. I reviewed the Gridseed Blade and sold it once it was no longer profitable. (Electricity is expensive here) So I sold it to someone who could still make some money off of it.

I guess if you have tons of different miners, it can become a hassle.

I have a bit of a different approach to that though, I would like to see what hardware mods can be done to improve the cooling efficiency. That's where the 3D printing fun stuff comes in.  

I'd be happy to review this. You bring up good points, even Gridseeds had their subtle tricks to make them work right. If you ran a gridseed at higher clock speeds there was permanent damage (more hardware errors/day) and regular usage caused a slight increase in HW errors (something like .01%/day). I ran two blades for 6+ months without fail. I started with 0-4 HW errors per blade, per day and ended with 74 HW errors/blade/day. I didn't overclock the units to any damaging speed. There was a narrow window that wouldn't incur damages, it was basically a higher speed that didn't incur any higher HW errors, (it took awhile to find it since early on there were very few HW errors/day).

If they do make a dual mining unit, I hope it has the thermal capacity to run both at a higher speed and lower efficiency. A big problem gridseeds had was their subcomponents, or in more particular, the voltage regulators were not very efficient and were not covered by any heatsink and as such they would either overheat, or fail in the long-term. I sold my gridseeds for a very low price since that was a high risk to myself.

I still have all the necessary parts to test, a Hardware bench, multiple Raspberry PI's, power cables (16 Gauge), Power Supplies (80+ Gold), Digital Multimeter, and an available power at-the-wall monitor. (And more, but it's a bit too long to mention).

My only major hope is that these units will be quiet, I live in an apartment and loud noises are extremely hard to control. The blade's were noisy, but in the hardware mount they were acceptable.  

Depending on the price I'll post something. I think it's important to get an alternative view to Dogies Mining guide (if he does one for the Sfards unit) and would add a bit of weight behind his guide if I came to the same conclusion. I sure hope Dogie reviews one, the pictures are always amazing.