Topic: M20S or anything else? (Read 383 times)

Thanks for your detailed explanation.

Yes, i magically can run at 230-236 volts.

because  people have 208 volts  and at 208 volts   you get 3360/208 = 16.15 amps

and people have 220 volts and at 220 volts   you get 3360/208 = 15.27 amps.

my main farm  does 217 to 227 volts

my 2 m20s are right next to a huge set of 3 fans  which blow cooler air directly at the 2 m20s and the 1 m21s

since  all three are over amps when we sag to 217 volts.  they are all at 15.48 amps.

I have 3 racks of gear  each with 5 shelves  and about 7-9 units on some.

if  every rack was an m20s

                 rack 1              rack 2        rack 3
fan>          1234567         1234567    1234567     > fan
fan>          1234567         1234567    1234567     > fan
fan>          1234567         1234567    1234567     > fan
fan>          1234567         1234567    1234567     > fan
fan>          1234567         1234567    1234567     > fan

my units would be at risk of wires melting  in a pattern such as above.

even  if you magically run at 230 volts and never vary   you are 3360/230 = 14.608  assuming that the psu never ages (it ages)  and  no power will be perfectly stable at 230  on and on and on.

it will flux.

so if the psu is perfect
if the volts are perfect
if you keep  room cool enough

230 volts should be okay.

frankly I would prefer they set gear to run at 65th and 3100 watts

m20sone
78.813T
65.560T
68.326T = 1 day avg
0%
2019-08-26 12:55
Active
Check

m20s2
70.369T
68.805T
69.492T = 1 day avg
0%
2019-08-26 12:55
Active
Check

m21s
50.196T
53.949T
54.135T = 1 day avg
0%
2019-08-26 12:55
Active
Check

I run three units  2 m20s  1 m21s  all are right on the border here they are above
and I check them 4 times  a day

69th -->3360 watts by 230 volts are 14,60 amps. Why you say only the 65th is under 16 amps?

It's tough. You just have to figure out if getting any of this gear at the moment makes sense for you. I agree with what mikey says below here. In this instance it could be worth it to pay a reseller their mark-up. It puts he gear in your hands sooner, so you don't slowly watch the Diff rise and kill your profits. Most hardware out has already sold a Batch a month starting Aug/Sep leading all the way to November. This means a potential Diff increase similar to the beginning of 2018.
The difference there was that there was a lot of gear available on hand. So people paid absurd prices based on the market and then watched each batch boost the Diff. Obviously as price tanked so did a lot of the hashrate. Hard to say what Diff will look like in December but if this price continues to hold, and all gear sold ships out we might be sitting 30% higher than we are now.


In the meantime you can check this thread out and see all new gear then check to see what you want, and when it might be available. Current List of Competitive Hardware - July 2019

I have never understood the point of such pre-orders, you are talking 4 months and a bit more of waiting until they ship the gear, so not less than 5 months until it's up and running.

simple math:

you paying 0.23 BTC

5 months is a long time, BTC price could double or fall 50% easily.

Scenario 1 : price doubles > you actually paid 0.23*24,000 = 5520$  ( I think you can get S17 for the same price now)

I highly doubt the gear will be selling for such a price even if BTC price would double, thanks to difficulty, profits won't double thus it's more than likely you will be able to buy the same gear for less from a re-seller or at at worst case scnerio you will have to pay the same

conclusion : nothing is positive about this scenario.

Scenario 2:price drops 50% > you actually paid 0.23*6000 = 1380$

profit will be very low, diff won't help much and you will probably buy the gear a lot cheaper, and if you were to keep fiat, you would be able to get almost 0.5 BTC by then.

There are however a few other scenarios where paying for a gear 5 months in advance is actually more profitable than just holding BTC or $ , but I would personally never give my BTC to someone else and wait for it to return to me in a completely different form/value 5 months later.

another option would be buying whatever is available now or has less waiting time, saw someone on Telegram selling M21s-56th (End of July) for about 3200$  and S17 4000$ (Aug) in china.

good point it is a viable choice.

m20 = 1980 and 45th or  44 USD a th

m20s = 2835 and 68th or 42 USD a th

I suspect it needs to be changed to about 63-65th  as it can pull too much power for a c19 cord.

I would fear running 50 or 100 in a hot mining space if I had 3 phase at 208 volts.

I would prefer some m20 gear.

At this point

I have tested

MicroBT-pangolin
m20s
m10

bitmain
t17
s17

avalon
a1041

innosilicon
t39

I can not rate avalon gear as it did not come with planned psu it has a beta psu.

I rate the s17  best  with One caveat stay under 240 volts.

But why just look at the M20S when its smaller brother the M20 has the same efficiency?

M20S = 68T 3260W (48T/W)
M20 = 45T 2160W (48T/W)

Three m20s were tested.

One did 69th at 3360 watts
One did 68th at 3350 watts
One did 65th at 3180 watts.

If you use  208, 220, 240 as volts only the 65th passes as at all levels it is under 16 amps.

No one has run or tested or demo’ed the 57th. From innosilicon but they claim multiple power settings so they will be able to be under 15 amps on the low setting.

Sounds like a good idea, it will certainly give me an almost three month head start over the M20's.

I may even take the plunge and buy eight of these;
https://www.innosilicon.com/html/t3+57t-miner/index.html

Or twenty of these;
https://innosilicon.com/html/t2t-30t-miner/index.html

Does anyone know what the amp draw is for the innosilicon and M20S?

I believe in multiple suppliers.

What can be order today is the innosilicon t2t 30 for about 1250 including shipping.

It will come in less then 1 month. Say August 15th.

So 1 of them due August 15th

And 1 m20s due nov 10 is okay.

30 th now
68 th later.

Hello all,

Apologies I originally posted in the wrong forum.

I am waiting for the Bitmain S17 to become available for preorder but all indicators point to a long wait.

I've seen the M20s 68TH for preorder in November and wanted to see what everyone's thoughts are. Shall I wait for Bitmain or take the plunge with https://pangolinminer.com/product/whatsminer-m20-series/

I've never used pangolinminer and not even sure if they are legit.

The S17 works out at approx $30 per TH, whereas the M20s is approx $40 per TH, however at least it has a set date so I can make plans around it.