Just to clarify miners don't have the option to accelerate a transaction any more than others. It's done on the pool side. What anyone who helped would have done is try a free accelerator - you can google them. In the future if you need this request the best place would be the Marketplace - Services. For now it looks like everything has been confirmed so you can lock the topic.

This is a review of my experience with the M20S 65 TH miner by MicroBT. This miner is built using 12nm chips and comes with a built-in PSU. I have allowed it to run monitored for a few days to get a good baseline for power consumption. The average temperature for the environment would be approximately 27 degrees Celsius.

Real Performance VS. Advertised Performance


This model boasts an advertised efficiency of 48 W/TH or .048 J/GH @ 65TH +/- 5% drawing 3120 W +/- 10%
Real world tests came in within spec as can be seen above. I am seeing 65 TH @ 3232 W giving us an efficiency of .0497 J/GH

This is a pass for the M20S model, it delivered as promised.

Ease of use
Install

It doesn't get much easier to set up than this. You are responsible for 2 connections. The first being the network cable which connects to Ethernet port. The second is the power cable. The miner requires a cable with a C19 connector on the power cable. I used a 12 gauge cable rated to 20 amps - Pictured is the supplied cable
Note you will need to ensure you have a circuit within spec for the PSU. This means a minimum line voltage of 200V and maximum of 260V. Confirm your particular models specs as PSU's may change.

Login and Configuration
Once you've accessed the miners IP on your network you will log in using these credentials - Username - admin, Password - admin.
Select the "Configuration" tab and then select "CGminer Configuration" from the drop down menu. Here you will enter your preferred pools information as provided by them. There is a power mode tab - Low Power function is not available at this time. I will update this if it becomes available.

Noise

This Miner is louder than anything I have run before. Using an App on my phone I received ~ 68 db near the miner on the inlet side. Readings taken from the Exhaust side were spiking as high as 78 db. A more accurate meter would be useful, but if you want to use this in a residential environment you need to consider sound proofing. It can be done as evidenced by my setup, but I would not recommend running this in a residential or home capacity without a plan for the noise.

Packaging and Physical Specs

The miner arrived in standard packaging for MicroBT miners. I saw no damage and everything felt secure as I tilted the machine to listen for loose or damaged components. It is larger and heavier than the M10's but overall has a similar appearance. See images below for unpacking.



Advertised Specs

• Hashrate - 65 TH/S +/- 5%
• Power Consumption - 3120 W +/- 10%
• Efficiency - 48W/TH
• Size: 39cm Length x 15.5cm Width x 24cm height
• Weight - 10.75 kg
• Operating Temperatures - -5C - 35C
• Power Specs - 200V-240V  ** MicroBT English site rates up to 300V. I will seek clarification.

Note about the Built-in PSU - Advertised is the P21 PSU, mine appears to be a P20 model, which I will inquire about.

Manufacturer: MicroBT - https://www.microbt.com/
Distributors: PangolinMiner - https://pangolinminer.com/ ; Whatsminer - https://whatsminer.net/


My personal opinion - Overall I am pleased with this miner, and would buy another of the M20 series. It delivered on spec, and on days that have gone above 30 degrees Celsius I haven't had any issues. I am disappointed that it didn't have the Low Power mode available with this batch, and hope it will become available. On the warm days I mentioned it would be nice to have the ability to change the power mode.

You are correct. On paper I had initially wanted to make a 90 in the tunnel itself but opted for a minimal curve when it became evident how long the tunnel would be. If the sound reduction wasn't already so good. I had plans for a 3 foot sound barrier the way your image described outside, most days my car works the same way. It would have been a fence with an old area rug draped and secured.

The reason you don't want to use the the rigid foam is it isn't as porous as a fiber fabric. My mineral wool or even fiberglass battens have a "loose" porous surface that absorbs and randomly deflects sound waves. That's where the dampening comes into place.

Here is the link to the new raffle. It is for .1BTC and has 32 spots.

https://bitcointalk.org/index.php?topic=5163670.msg51771223#msg51771223

First attempt fell flat so I'm back with the same prize of .1BTC there are 32 spots available, take as many spots as you'd like. I will then select 1 Block after the raffle is full. That Block will determine which board we will be using, the next block will determine the winner of the Raffle. See Post 2 for boards and available spots

Details

• Prize - Winner will receive .1 BTC *** - Transaction fee will be paid by me.
• Cost per spot - .00345 BTC. This buys 1 spot in this Raffle
• Payment - I will provide each participant an address to send their funds to once all spots are filled. This saves on TX fees, and coordinating refunds if the Raffle doesn't fill up.
• Escrow - If by the end of the raffle the consensus is that participants would like an escrow to hold either the Prize(currently held by me) or Tickets, that can be arranged. I reserve the right to choose the escrow from this forum. Darkstar_, OgNasty, or minerjones are my preferred choices. I have not yet approached either of them about this, if they are unavailable another suitable forum escrow would be chosen. *** In this case the Escrow fee will be split between winner and myself.

How it works

• Pick your spot - Confirm it is available by reviewing the list below and previous comments. Whoever requests the spot first will receive it, subsequent posters will be given the option to select an open spot if any are remaining after going through valid claims. If you edit a post please strikethrough the original comment for clarity.
• When all spots are taken I will provide a payment address - I will sign a message here when I do so.
• I will select a future block that will be for determining the winner using the last character of the hash of that block.
  

** By selecting a spot you are committing to pay for the selected spot(s) chosen. This commitment will be for 48 hours from the time posted, in case the raffle doesn't generate interest.

Edited: Block from board in description at top for second block.

Bitmain has been compromised several times, just have to be vigilant. It's funny I was pretty groggy when I checked it out today and never noticed the link - I even laughed thinking it was the worst scam ever lol. I never have to worry to much, Bitmain has no machines I can run so I don't even bother looking anymore.

Iirc each S9 moves around 250 CFM with the fan at 100%, This member used 300 CFM to err on the side of caution. Either way you have enough exhaust fan to cover the 29 projected miners.

4 exhaust fans @ 4200 m3/HR = 16800 m3/HR ~ 9889 CFM
29 * 300 CFM = 8700 CFM. This was an overestimation again, and still came in under your fans ratings.

What I am actually concerned about and don't see mentioned in your description is where is the intake? How do you plan to provide fresh ambient air to the miner inlet? You may need to look into building a hot aisle/ cold aisle situation, with louvers and/or fans for the intake air. This is common for many people. You can also see a description in this thread of someone who built something similar to yourself recently and what worked for them. I linked below a basic reference thread for getting started feel free to review it as well in case there are other considerations you haven't considered. Good Luck.

First time/Small time miner reference

Well some may be familiar with my winter mining setup thread, the cool times have passed and I'm back to the grind with full electricity costs and heat management. Then there's the ever dreaded noise that can accompany these shiny little beasts. I had recently completed a trial run on my tunnel for exhaust and noise reduction; and am super happy with it as a working design. Running are 3 M10's and 1 M20S, off 2 basic Dlink routers. I have 2 30 Amp circuits and 1 20 Amp circuit supplying the Miners, all 240V.

Warning *** It's not pretty, but it works  

The Tunnel

What you are seeing is the 4 miners directly on the concrete slab of my garage to work as a heatsink. The insulation above/near the intakes is rigid pink to avoid fibers being sucked in the intake - I do have to adjust the left side or cut some rigid to cover that. There is roughly a 6-9 inch gap in front of the miners before I laid down 4" insulation so as to not restrict the exhaust of the miners. Sides are all 6" Mineral wool and the ceiling of the tunnel is a mix between 6" and 4"; no specific reason here just used what I had. The reason my Tunnel uses the mineral wool insulation is for the sound dampening effect it has by being a porous surface. I directed exhausts towards the walling and even created a little bend in the tunnel itself to try and improve the overall length of the path the sound waves might bounce. The reason I used metal and mineral wool for everything in front of the miners is strictly a fire precaution should the worst ever happen. The airflow is all there as well, the sides are filtered intakes. There will be minimal recirculation of air as this exhausts to the open and the heat goes up while the garage sucks off the ground level unimpeded. Don't mind the sizing of the filter I had intended to place the tunnel in a different spot, but made due with a sweet fold job.

So the list of materials here is all stuff I had a round the house apart from a 20$ shelf and 12$ in wire. Here's the list of materials you can see; you might even recognize some parts from the winter setup.

Mineral Wool Insulation - 6 battons of R20, and 3 1/2 of R14  Left over from renovations.
2 shelving racks - 1 I had previously from the winter mining setup, 1 I grabbed cheap as I like the idea of a wire rack shelf in case I needed to change the design.
25" of wire - Just some threaded wire I used to support the insulation resting on top.
Duct tape - How could I not involve it in one of my projects, would almost be sacrilegious. It's really only there for the filters at the moment. Like I said working design and what not.







Above you can see various images of the tunnel as it was first laid out and is currently operating. The meter readings are done off my phone and from left to right are - Directly in Inlet near miners, Within 3 feet of the inlet standing, Outside 5 feet from the exhaust of the tunnel, and directly at the tunnel exhaust.

This is a far cry from where I started June of 2017 with 3 working S5's and one S4+, overheating in my garage as I had little concept of the importance of heat exhausting. Up until recently I had my 3 M10's on a rack pointing into my yard out the window. This was okay but I could hear the miners within say 60 feet, mostly because I knew to listen for the humm/buzz. It annoyed me more than the family but I hated being 30 some feet away listening to them with the kids; felt a little like a jerk lol. Now I'm not worried about the noise at all. I have 2 neighbors within 60 feet of this garage door and I had all sorts of dampening plans for the driveway that I can essentially scrap.

All that remains for my adjustments are a few extra connectors to ensure a good hour of cutting for anyone trying to enter the garage unnoticed - currently I'd say it would take about 25 minutes if they're prepared. Most days my car is parked within about 18 inches of the door not allowing much chance of entry. I also ran out of screen mesh that I want to put on the outside to reduce visibility and seal up the last few spots bugs could enter.

Well that makes sense. Work with what you've got. Not sure how many batches of S9's they will re release or when you will get them. I have heard of some other members trying to reduce the power consumption on S9's by removing a single hashboard. reduce the TH and the Wattage at the same time. Could be another thing to think about especially if you wind up going with a used one down the road. If I come across some of the posts I'll link them here for you. Good luck.

I'm a little rusty on making 110/120V systems work for gear like the S9's or Avalon 841's. They both have the ability or firmware to be underclocked to work but it's a stress on the system. Here is a thread from a while back that goes over the considerations, and has links to how people have made it work. https://bitcointalk.org/index.php?topic=2799754.0
Personally though I suggest you put in 220/240 V circuits for your miners. It's not difficult and would be offset by the cost of an additional PSU. Considering you said your power cost is low and not based on consumption, you can get a more powerful machine that is less efficient - which will help your earnings.

I linked another thread to review as I'm not sure where you are planning to place this machine but there are plenty of factors to consider before investing in gear. Good luck.

Topics for you to review:
First time/Small miner reference for getting started.
Current List of Competitive Hardware - July 2019

https://bitcointalk.org/index.php?topic=2799754.0

I definitely agree that having even a base set of guidelines for a lot of areas would be useful. The topic itself was locked from the start, usually what grabs my attention for some of these.

I appreciate the insight and discussion on this. I actually didn't assume you had handled the report. Just felt it was a good explanation to build on.


That is good advice, and will definitely keep it in mind.

See I can understand that and am only really looking to clarify. Does using the word "bids" alone give it enough of the characteristics one would expect from even the most basic auction?

There is no end date. Bids is essentially saying OBO ( or best offer). He states he us "selling" not auctioning. The thread is locked forcing off site communication; how can people know other bids?

I honestly read it as ".015 buy it now price, but telegram me and I'll consider offers." I would argue the locking of the topic makes it not open to bids, despite the wording.

Thanks for the insight and opinions on this. I guess it'll be a coin flip from now on reporting there as I've had some similar reports handled as I thought they would be.

They are a reputable company. That appears to be their most recent launch and is in pre-order stages. It isn't an improvement in efficiency @ .0578 J/GH , but is better than the T2T they have available. You would still be dealing with a pre-order though there aren't to many other options. You can also follow the links from this thread to manufacturers or distributors depending - Current List of Competitive Hardware

Edit: It appears Inno_Asic went straight to the sales thread and not a discussion thread - https://bitcointalk.org/index.php?topic=5163003.0
I was considering creating a discussion topic for this miner but it probably fits well enough here. These are the specs taken from the website. They do say efficiency mode should deliver great results but I just look at stock.

[WTS] Posting guidelines for physical goods

You may want to review the above thread if you want to generate sales on the forum. It covers a few things your ad could use like: A photo with a handwritten note containing your bitcointalk name and the date, Payment methods you will accept, shipping information, and whether or not you accept trusted forum escrow; which is pretty much a must for most here. Good luck

I've been thinking on this flag a bit the last couple weeks. The wording "I believe that anyone dealing with [---] is at a high risk of losing money" seem to be a roadblock for Flag 1 warnings; and could be replaced by something less universal. This currently gets read as absolutely everyone would need to be at risk of being scammed walking into this situation. Where something like "Users dealing with [---] may be at a high risk of losing money" is less encompassing. It gives the desired effect of warning naive users without having to tick the box of an experienced user falling for the same trap.

The situation that got me thinking about this has been resolved and was clarified shortly after a flag had been created but the questions lingered with me.

On a similar line of thought regarding warning flags (Type 1). If we believe that in the future someone will redeem themselves, but you currently view them as a risk. Should you create a flag, or limit yourself to using the feedback system?

You haven't experienced a troll. You are coming here with extraordinary claims/offers which would make anyone suspicious. It may be that you do have said boss and they enjoy making employees do things that will amuse them such as sending you on a mission that appears like a scam.

Let's say this entire scenario is legit - Can you show proof that your boss owns the amount of coins you are trying to sell. Maybe throw in some information about how this deal would go down - in person, Wire transfer, Cash folded into a magazine and mailed.

Curious on the opinions of others. I've been reporting a little in auctions whenever I browse the section, generally the reports are fine but I received a "bad" and figured I'd bring it here to discuss and give the thread a bump.


I believe the Tag would have been "This as a sales thread not an auction and asked it to be moved to the Marketplace -> Goods - > Digital goods - > Invites and accounts"
Anyone have any ideas as to what was wrong with the report? I've had others in the past moved and marked "good" so I'm not sure if it is just a one off or if this now counts as an auction.

I forgot my phone so I can't upload all the screenshots and photos, I'll have all that tomorrow. So far I'm happy enough with the unit as it's almost the perfect machine to fit what I have available. I've noticed the power draw from 3180 - 3260. I did a grab at 12 hours, which will have an average temperature of 25C throughout the day. It was doing 65 TH based on the status page. The noise came in between 66-74 db depending on where I held the meter. It was a phone app so nothing crazy. I don't have a link to the cables I'm using at the moment the site is down; I do tend to go with something overrated to avoid issues.

Mine      3220W @ 243V (avg) = 13.25 amps 13.4 if 240V
            3220W @ 208V         = 15.96 amps      Still okay rated at 16 amps but barely and with potential spikes on warm days.
Clifton   3220W @ 217           = 14.83 amps      Fine with room to spare

In regards to the PSU's. I think they are going with something beefier as opposed to detuning the machines. I was talking with Laurent about the machine to sort out my missing hashrate, and they mentioned sometime in the future being rated to 277V. 

Updates:

• I have created and included a list based on efficiency of all currently and recently available hardware under .07 J/GH
• I have updated MicroBT's best offering to the M20S, as from what I can tell there are no longer any outstanding orders
• I went through and updated pricing for gear based on what manufacturer/distributors are advertising

Right now the only odd listing is Innosilicon. It appears that a lot of the T3 variations have become worse with efficiency and or have performed under spec. I'm going to do a little more research and see what if there is any discussion around the pre-orders for the T3+; which is not an improvement in efficiency.