Whatsminer M20 is announced and available for pre-order

[philipma1957]

yours is better than mine

68 th with 3360 watts = 49.4 watts

65 th with 3180 watts = 48.9 watts

3180/208 = 15.288 amps         safe
3360/208 =  16.153 amps     not safe

I use this wire

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

it rates to 16 amps continuous duty.

my Clifton NY mine drops to  217 volts

so

3180/217 = 14.654    amps which is well under 16 amp derated
3360/217 = 15.483    amps which is very close to 16 amp derated number

If I had the 30 units I need to max out I would want yours not mine.

[1714254302]

1714254302

[1714254302]

1714254302

[minefarmbuy]

Seems another demo unit rated at 66Ths had a psu fail at stock. Seems MircoBT is working to update the issues with the psu's.

[philipma1957]

Seems another demo unit rated at 66Ths had a psu fail at stock. Seems MircoBT is working to update the issues with the psu's.

Yeah mine is still working.
The other was lost at JFK AIRPORT.

my conclusion on this design is it needs to be backed off.

3000 watts to 3200 would be better. Then the 3360 mine uses.

The c19 plug rates 16 amps for continuous duty.

My experience is 15 amps in a hot room with a ton of gear is safer then 16 amps.

So 15 x 208 = 3120 watts.

Since many have three phase and 208 is common low number for volts.

So pulling  3120 watts is better then the 3360 mine pulls.

I suspect there is a lot of heat at the c19 to c20  connection.

I mentioned my concerns on this unit pulling too much juice. A few times.

Btw the s17 2 plug design pulling under 2800 watts is smarter.

Our mod frodocopper had concerns about these beast psu’s being safe.

[Steamtyme]

yours is better than mine~snip~
If I had the 30 units I need to max out I would want yours not mine.

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. 

[philipma1957]

thats better a slightly better psu hopefully with the 2 plug design used by  the s17

and wonders never cease  my  missing m20s has been found in JFK airport!  it may arrive on thursday.

I will be adding

2x a1041's   = 63
1x t17          = 39
1x inno t39   = 35
1x m20s       = 68

total of 205  to my 675 = 880 in clifton

and 46 in  washington  or 926th

[TheYankeesWin!]

Phil I read the post office lost the second m20s at JFK airport has it shown up yet?

[philipma1957]

yes I have it now.  Testing it as it arrived with a broken fan.  Here are 2 screen shots



I used an m10 120mm fan
I used a 120mm metal fan plate from an old s7ln
I taped the 120mm mount plate to the stock bent  140mm plate that came with unit.

I attached the 120mm fan to the 120 metal plate
I attached the stock 140mm plate to the m20s

and boom  a high volume high rpm fan  with same 5 pin power cord replaced the broken
140mm fan.

now about 26 mins in

and

FanSpeedIn   = 5,370
FanSpeedOut = 5,760

temps
Temperature
SM0  73.50
SM1  71.00
SM2  72.50

firmware keeps board under 75 if it can.
both fans can do 7200 rpm

So it has head room  until they send me the custom 140mm 5 pin fans.

I had 4 of these on hand

https://pangolinminer.com/product/miner-fan-set-m10/

HAGGSFINN thinks this one below is the 140mm

https://pangolinminer.com/product/miner-fan-set-m10s/

and that it will work for the m20s gear.

an m20s 140mm 5 pin on left  an m10 120mm on right



bad stock fan on left good one still intact on right note the s7 ln in background



repair with m10 replacing m20s fan note the yellow tape it joins the 120 mm mount plate to the 140mm mountplate



so a custom 5 pin 140mm fan  is a shitty idea on some levels

as a 2000 usd machine would have been offline until a replacement was shipped.

I was lucky to have the m10 fans on hand as I own 8 m10 units and have purchased about 400-500 in parts for them just in case.

[minefarmbuy]

Wonder if you can use a shorter fan screw on broken edge?

[philipma1957]

side of the frame is cracked

the fan does not spin true.

I have confirmed this  set of fans works

https://pangolinminer.com/product/miner-fan-set-m10s/

it is a pair I will have 1 extra

BTW  usps  says I never got the package!

https://tools.usps.com/go/TrackConfirmAction?tRef=fullpage&tLc=2&text28777=&tLabels=CE902010504FI%2C

a-holes!

At Haggs I will send coin  later today please send me your BTC addy.

[HagssFIN]

Yeah,
it was a real mess with the USPS...

I sent it to Phil via Finnish postal service Posti and it arrived at JFK airport in June 24.
Then there was a long pause in the status update and I was affraid that it is lost or stolen at the JFK airport for good.

I'm so happy that Phil received it after all,
but I'm sad that one fan broke during the shipping.

Thankfully Phil found a temporary solution to start the mining,
and I will supply him with a spare fan set.

@Phil, sent you a PM.

I don't know if this is a bit too much offtopic,
but I just want to say that sometimes the logistics can be a huge pain in the ass in bitcoin mining!

[philipma1957]

Back to the m20s

I am now running 2 and they are pretty amazing units.

Basically 10 s9s in the space of 2. Use about 6700 watts combined doing 139 th at the pool.

What would I do with these if a designed them?

Two things either clock them to do 64th and pull 3125 watts.
Much safer load for the psu to do.

Barring that idea. Beef up the psu's make them use 2 c19 plugs.and make them able to do 4000 watts

You could squeeze out maybe 71th that way with no danger of overload to the c19 to c20

Connection.

They are the loudest miners I have owned about 85db

[TheYankeesWin!]

Looks like they listened to you phil

It now comes it 3 different top speeds

https://pangolinminer.com/product/whatsminer-m20-series/

68th = 2835 for 1 to 20  Nov delivery

65th = 2710 for 1 to 20  Nov delivery

62th = 2589 for 1 to 20  Nov delivery

[philipma1957]

https://pangolinminer.com/product/whatsminer-m20-series/

yeah  and if you buy 20  they discount.

62th 1-19 = 2589   but  20+ = 2354

I would buy this if it came by sept 15 but nov 15 shipout  is  123 days from now that is a long time.

My 2 m20s should mine   .35 to .46 btc in that time frame.

as 138 x 123 x 0.0000276 = 0.46848    and with diff it may be as low as 0.35

[Steamtyme]

Must be early for some reason I thought you were posting Power consumption.  
I'm pretty sure this has been in the pipeline going back to when they changed the specs from 72TH to 68 TH. I know the Demo unit I received should have been a 68 but wound up being a 65. When I was doing up my review I came across the various models they would have - I still think the 65TH model is probably the sweet spot for now. Time will tell if it's just to much for the one power connector or not.

Yeah the November wait times is just to much. Especially considering for me that's the time of year I start to run less efficient models for home heating, so I'd be better off sourcing another M10 in the meantime. I do feel like I have a hole to fill looking at the my 1 PDU supporting 1 machine.

[philipma1957]

Does your mineral wool make dust in your sound proof tunnel?

[fccs]

The funny thing is, now I'm sort of more interested in this.  62th @ 2976watts essentially makes this a pdu capable unit.  That's basically right around 12amps which is the safe zone for plugging into a 240v pdu that has 15amps each side.

[philipma1957]

Yeah I have more l6-30r receptacles and can run a l6-30p to c19 cable but I do have other gear.

My four panels can do

225 amps  9 receptacles

225 amps  9 receptacles

250 amps 11 receptacles

250 amps 11 receptacles

Have to check the two new ones. I know running 20s direct seems wasteful but if they do 3000 watts

They would be good for me.  I may get a third unit the m21s. Which is a bit of a power hog like the T17 is compared t9 the s17.

[Biffa]

All new batches on web sites are now pushed out to December

[philipma1957]

All new batches on web sites are now pushed out to December

great  things get worse not better.

[Searing]

great  things get worse not better.

This is why we never can have 'nice' things anymore!