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Pangolinminer is shipping me a m21s. Should come tomorrow.

This should do 56th and 3300 watts. Not sure 🤔 if it has a low speed.

Spacer.

Feel free to post your thoughts on this unit.

edit: This m21s sells for 1900
        The m20s sells for 2800

Pre trump tax
Pre shipping.

Both use 3300 watts.

One does 55 th the other does 68th.

So you get about 13 th for free power and pay 900 in cash for that.

0.00002777 x 13 x 10200= 3.67 a day so 900/3.67 = 245 days.

The extra shipping is 50
The extra trump tax is 225

So 275 extra if. USA based

Makes 1175/3.67= 314 days. So it may make no difference as to which you buy.

As 245 to 314 days is a lot.

M21s is in house will be running it soon.  It basically looks just like the m20s.
So the good news it is up and running yeah baby.
It has a working low power firmware yesss!!!

imgur is down can not link photos
back  up and here is gui it has yet to tune on low

https://i.imgur.com/6B1pWxm.png (https://i.imgur.com/6B1pWxm.png) https://i.imgur.com/ZBrrzq8.png (https://i.imgur.com/ZBrrzq8.png)

tuned on low it is really quiet fans are well under 2000 rpm
does 29th at 1750 watts about 60 watts a th

this is a 1900usd unit running it at 29th means a long roi even if power is free ,but it would make a decent space heater for the winter.

So if noise is an issue you could use this gear. 29th is   29 x 0.00002777 x 9500 = $7.65 usd a day for low speed and free power.

Nice I knew you planned to spread out your gear purchases, but didn't know you were looking at the 21's. Nice to see Whatsminer is starting to launch units with working LPM, ideally this will role out for the other models soon. While nothing special at low power costs they are definitely viable, might be a nice unit to host with Pangolin for some if that service pans out. Keep the shipping and import costs down.

https://pangolinminer.com/product/whatsminer-m21s-with-psu/

1905 + shipping + trump tax

https://i.imgur.com/S8OxScR.png (https://i.imgur.com/S8OxScR.png)

corrected the error.

These are shipping Nov. for everyone but Phil ;)

I wish as I could use ten yesterday.

I now have

2 m20s. Demo model
1 m21s. Demo model
1 s17 pro 53th----------------not a demo
1 t17 40 th -------------------not a demo
2 a1041 37th beta model
1 inno t3 t39------------------not a demo

And waiting on 1 Inno t3 t50.

What do I think of all the gear above?

If it were the world according to Phil
I would have purchased all s17 pro 53 th 100 of them I had a chance to buy 100 for 220000 usd the window was small and I was short that much cash. But it would have been a really good move.
By the time I got it I new I should have ordered more.

I have 160kwatts

so 100 s17 pro 53th set to low speed will pull 1450x100= 145kwatts and do about 100 x 40 = 4 ph

Back to the m21s. It is pretty quiet it is 91 f in my garage and it has a fan speed set to about 1800 rpm on low speed.

You can’t tell it is running on low speed. High speed it will wail.

The most disappointing of all above was the inno t3 t39

The avalon I can't judge since it was a beta model  the psu is not the stock one.

Yea best pricing was end of Q1, early Q2 with most shipping dates to go with.

My T2T 30T are pretty nice besides the lack of fan tuning unless temps are 50C which is never.

If the M21s is really that quiet, I'd be happy with that too. Only have room for 2200w so basically one more unit before having to replace gear.

some high speed results

55,915 at 3460 watts  gave me 61.87 watts a th.  it is loud and industrial at high speed

second test  I got

55,915 at 3480 watts about 62.2 watts a th.

I will do a low speed 10 hour watt use test. I have a hourly kilowatt meter.does very good numbers overnight more accurate then a kwatt meter.
I wish low speed was more power efficient then 60 watts a th which is why I will do a longer more accurate test.


it is quiet on low  and does 29th and 1750 watts fans at 1750-1850 rpm

I just set it to high I am guessing it will not be quiet.  Would love to see if it can do 55th

It is still tuning fans at 5500
Okay we are at 55.9th  nasty pitch noise

pulls 3550 watts about 63.5 watts a th

so I am a bit under 56th spec at 55.9 but +- 5% with ease
my power at 3550 vs 3360 is +5.6%   but they have watts at -+10 %

This is industrial if you run it at top speed and it easily can run in your house on low speed.

If you have it at home maybe you can turn it up in the day and down at nite.

https://i.imgur.com/eYolX40.png (https://i.imgur.com/eYolX40.png)

So you check meter at like 000070.00   and ten hours later it reads 000087.00  then 87-70 = 17/10  1.7kwatts an hour for low?

Hope so.    Meter was at 001070.00   so 10 hours should be 16.5 to 17.5 kwatts

7 hours later  meter reads 001081.67

  1081.67
 -1070.00
      11.67

11.67/7 = 1.667 kwatts  or 1667 constant watts  it hashed at 29.054th  so    1667/29.054 = 57.3759  watts a th on low   so my  hourly kwatt meter tends to be

more accurate then a cheapo kwatt meter.

so low speed is 57-58 watts a th

and right now in a cooler room it is 740 am, My fan speed is 1500rpm  so you can use  it on low speed in your home and not piss people off.

10 hour reading
1086.70
1070.00
16.70 kwatts /10   = 1670 watts after a 10 hour test.  and hashing at 29059gh

so

1670/29.059 = 57.469 watts a Th.

This gear would be best for a place that can be noisy at least 1/2 the day.  But that it needs to be quiet say six to 12 hours a day.

Pretend you do 56 for 1/2 and 29 for 1/2 you get an average of 42.5th each day.

Efficiency seems to be 57 to 58 watts on low which is somewhat disappointing.
It is about 61 to 63 watts on high speed which is pretty good.

For noise reduction I have been messaging a guy that sells this.

https://www.ebay.com/itm/273926631722?ul_noapp=true

He can redo the design for a m21s/m20 at a cost of 150 EUR and sell it then for 160 EUR. Do you think it would be an option to go this path to make it quieter to run the miner at full speed.  He can put a 6 in exhaust port to flex duct the heat outside.

What do you think?

I think it will over heat at high power setting.
I think at low power setting it will not be necessary to use it.

The issue is  the unit is moving  3300-3500 watts of heat at high speed.  It is old school 1 tube design not the shorter 2 tube stack design of the s17 or avalon a1041

The baffles will simply restrict the airflow  and it will overheat.

s-9 = 1200-1400 watts high speed

m21s
m20s   3300-3500 watts high speed

m21s uses 140 mm fans  it moves more air to cool 2x the heat
s9 uses      120mm fans  it does not need to move as much air.

If the whatsminer went with  the settings the newest s9 firmware offers :

-0.5 th
-1.0 th
-1.5 th
-2.0 th
-2.5 th
-3.0 th
low speed enhanced

i think the box  could be used if you had multiple settings

pretend  you had

55th top speed
50th
45th
40th ----------  this would pull say 40/55 x 3500 = 2545 watts  this may not over heat.
35th
30th

The designer says this.

The total cross-section of the cutouts in every dampener plate is bigger than the cross-section of the fan outlet.
So air-flow wise, the box should handle it.

I am considering paying him to have a redesign and order one for testing. I can post the heat results and then if they seem good then people can order from him thru eBay. Low power is an option but it's like owning a Ferrari but only putting it in first gear.

I am all for testing and science.  But my gut tells me  the m20s and the m21s will struggle in the box.

Upside is if it works  you can mine them  in your home.

Both unit m20s and m21s  are pushing the envelope of safety in the power cord.  as the c19/c20 jacks  rate at 16amps in a 24/7/365 constant run time.

my tests on 3 separate pieces 2x m20s and 1 m21s  show they pull over 3400 watts close to 3500 watts.

all my tests were done  with power in the 237 to 243 volts range.

3500/243 = 14.403 amps = okay
3500/237 = 14.768 amps = okay    but in my tests  power cords have open air  so they will rate closer to the 16amps

in a hot box  the power cord will stress more due to heat..  and that  14.768  will become borderline safe.

in clifton farm where noise is a none issue  we range from  217 to 231 watts

3500/231 = 15.1515 amps = okay and we placed the three units closest to the cool air intake fans

3500/217 = 16.129 amps = wrong  but just barely.  plus 3 huge fans hit it with cold air.

So I caution you with the box

1) really check it a lot.
2) measure volts
3) measure watts
4) measure temps
5) measure sound.

good luck would love to see if you can tame these beasts.  m21s and or m20s

@ whatsminer    please give  us 3 or 4 speed settings

Yes my concern is also the load on the c19/c20. Close to the 16A rating. Although the M20S on Pangolin goes from 68T to 62T with power rating from 3260W to 2977W. On my order it does not state what the Th/s rating will be so my guess is it will be what they ship. So you could get a 62T version which would give it a bit more safety on power consumption and if you can run the M20S on low power mode then that would reduce the noise. So many decisions and unknowns.

yeah it is tough.  I mined since 2012.

I have found  that  if you are right on the boarder of a safe load over time 3,6,9 months that wire starts to fail.

These units are on the border of safety for the c19/c20 cables.  So if you test  if could be good for weeks or even months then fail.

I could bullshit like I am an expert on the physical property of wire coatings.  Truth is I am not ,but I am well read.

Most wire covers are plastic derived vinyl based insulation.  Constant warmth  tends to slowly damage them  and they fail.

I have had more then a dozen warm wires  melt and fail over time.  Latest one was these pcie wires in this psu see link

https://www.ebay.com/itm/200V-240V-2450W-Power-Supply-for-Antminer-S9-T9-S7-L3-Mining-LOT-MA/253950507883?

ran none stop from Nov 2018 to aug 2019  finally failed last week.

I have had iec 320 13/14 cables fail.

and c19/c20 cables

all were over  3,6,9,12 months time as they were close  to the edge.

Has anyone tried using a splitter on this miner?  I feel like it's a horrible idea but figured I would ask first.  I got a good deal if I want it for the 54th models of these m21s's but... I run all my miners on pdu's and even at 3240, I don't see how this can be reliable plugged into a pdu pulling that much power.  Unless the power cord coming out of the unit split in 2 (Sort of like the bitmain s17's do) and I can plug them into each bank.

One option could be to make your own 10 AWG cable.

https://www.mouser.com/ProductDetail/Schurter/43000921?qs=%2Fha2pyFaduhFb9VPTXCo5zKca%252BgdnppnLs1JQQYxQIQ%3D
https://www.schurter.com/datasheet/0921

https://www.homedepot.com/p/Southwire-By-the-Foot-10-3-600-Volt-CU-Black-Flexible-Portable-Power-SOOW-Cord-55809799/204632922

The datasheet for the connector says it only supports up to 12 awg wire, but I bet you could get the 10 awg in with a little effort.

I use these

https://www.ebay.com/itm/L6-30P-to-C19-Molded-Power-Cord-10ft-220V-250V-30A-Ships-Free/202648792458?

direct to the wall plug.  so on a 30amp circuit they use 14-16 amps.  I still can make it work well  since I have 9 circuits to a 225 amp sub panel. And six subpanels

9 x 24 = 216  which would be hard on the sub-panel  and can trip it on a 95f day.

so I do 2 of these  at say 2 x 15 = 30  and 7 x 24 = 168  

 Thus 168 + 30 = 198 which is easier on a 225 sub panel

If we went all m20s  I would truly be afraid of a meltdown since I know we run from 217 to 227 volts.

That's the thing, I am trying to avoid using direct to wall.  I have the power and the outlets available to use but I would rather plug this into a pdu somehow.  I do not like plugging anything in especially 3000w+ that is running 24/7 direct to wall.  It seems not many people are buying these units using 3000w+ (Probably this is why) so I can get them at a rather good price lately.  Why in the living hell they wouldn't make this a 2 cord unit like the s17 is... is mind blowing.  I would like to get these on my 240v pdu's somehow but no clue how.  My idea was which I don't even think they make, get a like.. c13 connector to miners power supply into 2 nema normal outlets which you can plug both into a pdu.  This would hypothetically split the current up between each side to about 1250w each.

Also, does this miner take c19 or c13 connection plug into the power supply?

If you try to split it you would need to put a fuse or breaker on each leg or you're just asking for trouble. Without fuses or breakers, if one cable fails or comes loose the other cable is now taking the full load and could go up in  flames.

Yea def.  that's why I couldn't find anything that would work reliably.  Shame too, I wouldn't mind running these units but no pdu means no buy.  Stupid to plug this into wall outlet running 24/7.  Imagine your dryer running 24/7 essentially, just asking for electrical problems if a storm comes through.

You can go direct to a circuit panel if you can find a proper breaker.  In my case I have 30 amp breakers and only 3 of them , but if I had 20amp  breaker it would be quasi okay.

What would be nice would be finding a pdu with a 20 amp breaker.

I frankly consider the 20s and the m21s units a bit of a safety risk.

To be honest  the s17 pro  2 plug design is light years ahead safety wise.

I googled around and found this  it may work  pretty cheap price

https://www.amazon.com/Square-Schneider-Electric-L211N-240-Volt/dp/B00002NB3H/

https://images.tradeservice.com/9ETBOIYK8205G6UU/ATTACHMENTS/DIR100223/SQAREDE99720_3_3.pdf

http://download.schneider-electric.com/files?p_Doc_Ref=3100BR9801

https://www.schneider-electric.us/en/download/document/2069/

https://www.schneider-electric.com/products/US/en/products/L211N

Yea I'm not changing breaker for one miner, plus I have 30 amp outlets which will handle it fine.  Just don't want to direct plug in that.  If the miner can't go on a pdu, it doesn't go for me period.  I wish some pdu's had 20amp breakers, that would solve everything but sadly all mine are 15 amps each bank.  I'm not always around to monitor in person so I just don't trust plugging something like this direct into a wall without a pdu or surge protectors basically.  Even though I have one on my entire panel, still don't feel comfortable with it.  They def. should have done a 2 plug design, would have been way better.

It is why i hesitated to buy these in bulk. I had a chance to get more of these and of the s17 pro.

But I had not tested any. So I did not order a lot of them. If I had  know they run well as they do I would have grabbed 10 and had one sub panel with 20 amp breakers and an isolation transformer.

We are going to add a transformer and do 200-250 more kwatts.
So doing sub panels with 20 Amp circuits are not a biggie.

The transformer would be in the warehouse.  We have two big ones in the building already.

It's too bad the miner prices lately are so inflated and ridiculous it's rarely feasible or worth it.  Hell I remember ordering a bunch of m20 normal ones for about $1300 each about.  Now they want like $1900 for a even later shipment.  Getting out of hand now lol.

We just need a pullback below 6K to quench the craziness and give us another chance to get reasonably priced gear. After that, a bull run to up to the halving would be great....

Down below $9700 ... could be on our way there now.

I don't see it going that low sadly but who knows.  You and 90% of everyone else probably is saying same thing.  We as well as the asic manufactures know the halving is less than a year away and most likely are expecting a big spike sometime next year before then.  Gotta keep that in mind

Yeah but selling gear for prices too high for 4 cent power to profit is not the way to go.

Trump tax = death for a usa miner

but even if you are in china the prices are very high.  an in hand m20s 68t is more then 3000 in china.

at 9700 a coin the m20s makes 16 a day power at 4 cents is  3.20 so 12.80 profit

means  3000/12.80 =  235 days  12345Rose#

and a simple price drop  puts you dead.

So the argument  is  pricing is now geared ar 2-4 cent with  most all risk on the miner not the seller.. What  big miner buys in..

We know I got a m20s at 2050   which means the builder turned profit at that price.

I see no price under 3400 for the same gear  that is all profit for the builder.  Risk has been shifted to the miner.  Even a 4 cent guy in china has risk buying at 3400 or even 3000.

does not look good.

We'll hopefully the Trump tax will motivate some American companies to get into the mining asic business. Would be great to have AMD and Nvidia in the game.

Their products would still likely be made in china.

I think even before the tariff situation many companies were looking for other alternatives, Vietnam for example.

I'm not so sure there's much advantage of building high cost and low complexity items like these in China vs USA. A $300 cellphone is another story ... 10X more complicated and 10X cheaper. 50% of Samsung's chip fab capacity is in Vietnam, and TSMC's is mostly in Taiwan, so the real guts of the miners are probably not originating in China anyway.

All they have to do is ASSEMBLE it outside of china

Got mine a few days ago , paid 1500$ for it, it should be here , given the price of bitcoin now and the time you bough yours it seems like we paid the same amount of BTC except you got yours way ahead of me, never really had a miner from whatsminer,  i have been a bitmain fan , but thought I would try something new, will post my reviews when it arrives.

nice look forward to seeing if they changed the low power setting.

The issue I got this from my reseller in China not directly from the manufacturer , it is brand new but I am not sure what batch it comes from, so it could very possibly be the exact same batch you got, either way, we will find out pretty soon, i will keep you updated.

Mine was delivered in august. high speed was 54-56th    65 watts a th

low speed was 29th it was very quiet at this speed, but it did not save a lot of power  60 watts a th

since miner is at Clifton those numbers are off the top of my head.