Topic: Antminer S21: Bitmain’s Game Changer in the Bitcoin Mining World. (Read 1301 times)

Bitmain does this again , S21 pro 234ths dumping on top of preorders S21 200ths miner

s19 , s19xp and s21 are routinely tossing the new fans “martech”

unfortunately they no longer use the delta model fans.

If I had a dollar for every time I read that something was a "GAME CHANGER" in the crypto world, I'd have a lot of dollars.

Apparently Vosk of the Voskcoin YT channel was having problems with his S21's after only a week, fan failures, I think it was.

They really need to start using larger low RPM fans on these to keep the noise and fan wear down, there's an aftermarket kit to adapt an 8 inch fan that is very quiet.

Totally get that, Phil. I am also a very small farm owner (smaller than you!) I have about 30 Machines running full time at 1 location, and about 8 at another. It, undoubtedly, hurts... I just had to pay a $5,961 power bill this afternoon. But - Even tuning my 19K Pro's down to about 98 TH/S utilizing the ePIC UMC's Voltage Optimizer, the S21 in LPM is still more efficient.

Is it like - absolutely revolutionary? No. Is it an improvement from what I was using prior? Absolutely. Also - comparing it to the MicroBT or Canaan offerings, it still seems to be the clear go-to choise from my perspective.
I actually just received a 188T S21 from Altair yesterday that I got up and hashing today - am VERY pleased to announce that thus far, it is pulling 3.38 kW @ 192 TH/S (average). I only have 2 S21's - will be taking delivery of several more in the next month or so. Will certainly update this thread with some power figures next time I drive up to my farm.

No, just standard Bitmain firmware. I never use aftermarket firmware unless absolutely essential (e.g. an old knackered miner that won't run on standard firmware any more).

. 300 x 24 = 7200 watts a day.

35 cents a day at five cent power. 
70 cents a day at 10 cent power.

A small commercial mine like mine has 70 pieces

we are near 5 cents.

so we lose 25 usd a day in power. or 9125 dollars a year.

It is a lot for us.

You are very lucky newer got under 3900w
https://www.youtube.com/watch?v=NWVqNSx4YUI

you are 100% correct! I ordered several S21's but only 1 from the jan batch. I can say, with the utmost certainty, it pulls on average 3.621 kW @ the wall. Your prediction is extremely accurate lol.

All the same - the miner averages about 204 TH/S which is solid. Hoping to be able to undervolt/underclock it for even greater efficiency (wouldn't sacrifice more than 10% HR - but if I can drop it .5-1.5 J/TH like I was able with my 19K Pros - i'll be happy.

have you any firmware sourced? to increase efficiency?

Having received my order of S21 195T's, I must say I'm impressed so far. Most of them are reporting 198T or 199T performance.

The highest power consumption I measured is 14.6A, with 240V at the breaker.

14.6 x 240 = 3504W

3504W / 199T = a very respectable 17.6w per T.

Most measured 14.4A or 14.5A, with one as low as 14.2A, giving 17.2w per T.

As for the power leads... Out of 24 units, only 3 came with the C20 - P13 lead that Bitmain told me I would receive. The other 21 units came with a (6-pin) version of the P13, to 4-pin P13. This was VERY annoying, as I had to butcher these leads, otherwise it would have been a long wait to have some sent from China.

If I had a Bitcoin for every time I read that some new thing was going to be a "GAME CHANGER" in the Crypto world.....

I'd have a lot of Bitcoins!

Read about noise boxes for ASICs. For 50-70 dollars you can buy the material and make the noise box yourself, or buy a ready-made one for 200 dollars or more. If you have inexpensive electricity, then the noise problem can be reduced.

they will be very loud.


maybe in a super cool room say one unit the fans will slow a bit.

Anyone got a video of how loud this thing is, or a comparable miner?

Back in '17 or so, I had a few Avalon 741s, and they had to be run in a side room in the basement with cement walls, and even then you could hear them if you listened.

I don't like the idea of this new miner having a special plug, anyone competent with electrical wiring could crack the case open and cut out this fancy plug and wire in something easier to match up.

3 wires come into a private home.

hot 110 volt
hot 110 volt
ground


panels in a home are typically

100 amps
150 amps
200 amps

400 amps  but rare for a private home


my panel is 150 amps

my 2 hot legs run at  119-121

So I do 238 volts to 242 volts.

I have a  220/240 circuit for the ac
I have 3  220/240 circuits for mining

I have 30 circuits for 120 volts.

I do not mine at home for profit I support the commercial mine in Clifton.

It is more like your setup but we have a 320kwatt standalone transformer that feeds to an 800 amp 440 volt panel
that feeds to 2 sub transformers 1 at 220/235 volts 1 at 117/120 volts.



As to apartments.  I lived in one in New York City 1986 to 1992.

It had a circuit panel with 6 120 volt 15 amp breakers
It had 2 220 volt 20 amp breakers.

the 220 volt were for the electric stove top and oven (breaker 1)

and for 2 in wall ac units (breaker 2)

funny thing is that apartment house had 5 apartments.

each one had a separate circuit panel with all 5 meters on the first floor.

We had a major blackout in 1987  most but not all of NYC was turned off.

My block was dead and me neighbor hood was dead for miles. yet I had power to my refrigerator.

of course no btc back then. 

I often think about that 'free' circuit
1) how much could it do
2) how did it get setup
3) would I have been able to do a decent rig or two on it?

Bitmain website is complete BS , they say the lower the ambient temperature the lower the power usage .
Newer got anything under 3900w @ 200ths even 5c ambient temp in my unit.
Low power mode is good efficiency, but you will be buying miner 200ths timer price per ths . They want to look much cheaper but actually they dont.
Think Whatsminer has done a better job on their M60s

philipma1957,how are the apartments connected to the electrical network?
In Russia, in a private house, you can connect 2 wires as standard: phase (hot) and ground, and then the house will have standard 220 volts.
But you can also connect 4 wires, these are 3 phase (hot) and ground, and have 380 volts and 220 volts.
380 volts can be used for powerful electrically heating boilers, a personal workshop with professional woodworking machines, and anything else.
But there is a secret here: limiters are not installed on a 220 volt connection, but consumption limiters are installed on a 380 volt connection so that there is no production in a private home. But for a bribe, a local electrician will replace these limiters  

But in an apartment, as a rule, there is only 220 volts, although you can connect 380 volts, for example, for a bathhouse in an apartment, but you need to pay for the project and connection, but this is a rare case.

Three wires come in my house.

2 hots 120+120 and a ground

this is very common for a single family home.

my switch box allows  1 hot to 1 ground with a neutral gives me 120 volts.

most outlets in a usa home are that.

I also can do hot to hot and a ground.

my ac and three outlets for mining are wired for that.

If I get an s21 and run in my house I would use one of the four transformers I have they all allow 30 amps.

they all have and can do 30 amps. I would simply do one that boosts me to 250-260 volts.

and 3900/250 =15.66 amps

In the Russian energy system, everything is much simpler, because all houses are connected to a single transformer and the voltage in the electrical network is 220 volts. In villages there is much less, because the old transformers are overloaded, but there is no need for additional devices. In the USA there are 2 voltages: 120 and 240 Volts?

It looks like you will need to down clock the gear.

maybe run 160th not 200th

or pick up this

 https://www.ebay.com/itm/126119287029?

now this says step down but switch input to out put an it will boost you 32 volts.

this would solve the problem for a 1 miner garage units.

my home gets 238 to 243

add 32 I am at

270 to 275

the miner  psu claims to handle 277.. I have used these with my whatsminers and they work