Great review Hagss, thank you!

Big issue is that Pango has delivery until October!
Anyone know how to buy direct from microbt? I can't even load their page to see their delivery date.

Sorry, but as far as I know, that site is a scam site. :/

The official site for manufacturer is www.microbt.com

These two are trusted resellers
www.pangolinminer.com
www.whatsminer.net

I do feel for those that are ripped off by scammers.

Anybody having issues with the updated M20S firmware, Nov 5 edition?
Pre-update 3.35 kW, 69.5TH.

Post update, uptime is showing 25m and stats are 3.2kW, 23.745TH.

On a related note, could someone send or show me where I could download the earlier firmware (I think it's 20190927)

Appreciate any help!

Edit: Holy crap it took 40m to warm up but is now moving - 69.5TH/3.35kW. All that work/anxiety and no change

So after 2 years since the release of this gear, how is it holding? Would appreciate everyone's experience with the M20s and whether they are as robust as the m21s.   

I think both are dead .

Both needed psu's

But the mine is hot and these gears are a hot unit in the first place.

I could go to farm link and see what is left of my what's miner gear.

give me 10 minutes.

My bad hagssfin  gear a m20s

is still running on low at 42th but pulls 2900 watts

one of the m10's from Dec 2018 is running it does 27th on low power

one of the m10's from Jan 2018 is running it does 13 th  on low but 1 or 2 boards can't sign into it but it hashes.


So I have 82th working of what should be 128-131th

I did have the other m20s die. and a m21s  and a m10 that is over 160th lost.

so lets day 160th + 48th = 208th lost and 82th working.

But the room is very hot. It has a few other issues.

My bitmain s17pro
and my bitmain L3+ gear did the best of all asic gear we have.

The cannon gear would be second best.

Frankly it is a 2 fold issue room is too hot and we get brown outs that are very hard on psu's

Okay we have a voltage drop issue at the large farm.  One or 2 times a month the voltage drops to 190-195 vs 238.  The reason is Verizon a large phone and tele company is a block from the farm/warehouse.  This particular Verizon location is the redundant back up to the New York Stock exchange and they test the backup monthly. When the testing the backup it browns us out.  10 -20 minutes.  Not a big issue except the psu's will run on almost all the gear and the what's miner  psu ends up getting stressed and pulling excess amps to run the gear. So the psu's tend to wear out.

Also the psu was 1 plug not 2 so sometimes we would pop a circuit. It is not so much that the gear was bad as our farm has the voltage issue. Secondary the what's miners are not as heat robust as the s9 or s17 or t17 .  In the summer if we get to 95f the hot aisle is really hot 120f. yeah the cool aisle is also 95f.  And the what's miner gear would specifically say the room is too hot.

We are in a large ware house in a smaller room. We have over 300kwatts available but can not get enough air into and out of the room.

we feed in 9+10+5 = 24000  cfm and pull out 14+5= 19000  cfm.  We burn 125 of the 300 kwatts available. 

So the bitmain gear will run on those hot days.
The whatsminer struggled.

We have a second room it does well with gpus only. But it is 10x the size and 1/7 the power used.