Antminer S21: Bitmain’s Game Changer in the Bitcoin Mining World.

[philipma1957]

Have you seen the new power connector for new Bitmain S21 ASICs?
I hope the cable comes with the ASIC.



Why is Bitmain inventing new connectors? New ASICs have the same power as the old s19 series. If you lose such a cable, you won’t be able to quickly buy it in a store.

no i think they are a 3500 watt miner.

which is not the same as the s19 series.

https://shop.bitmain.com/product/detail?pid=00020231212155051379R2N3JfQc065A


below is the highest power s19 3247 watts

https://shop.bitmain.com/product/detail?pid=00020230626114337330962EtM9r0640

so 253 watts more.


after running a lot of antminers I know some are better and some are worse.

So a rated 3500 watt unit will sometimes do 3650 watts.

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[mineshop.eu]

Have you seen the new power connector for new Bitmain S21 ASICs?
I hope the cable comes with the ASIC.



Why is Bitmain inventing new connectors? New ASICs have the same power as the old s19 series. If you lose such a cable, you won’t be able to quickly buy it in a store.

no i think they are a 3500 watt miner.

which is not the same as the s19 series.

https://shop.bitmain.com/product/detail?pid=00020231212155051379R2N3JfQc065A


below is the highest power s19 3247 watts

https://shop.bitmain.com/product/detail?pid=00020230626114337330962EtM9r0640

so 253 watts more.


after running a lot of antminers I know some are better and some are worse.

So a rated 3500 watt unit will sometimes do 3650 watts.

Absolutely, we got and Sample unit few days ago and couldn't get nowhere near 3500w @200ths.
Power usage 3800-3900w.
Best Efficiency got on low power mode 160 th/s @ 2600w what is 16.4 j/ths which very efficient

[philipma1957]

Have you seen the new power connector for new Bitmain S21 ASICs?
I hope the cable comes with the ASIC.


Why is Bitmain inventing new connectors? New ASICs have the same power as the old s19 series. If you lose such a cable, you won’t be able to quickly buy it in a store.

no i think they are a 3500 watt miner.

which is not the same as the s19 series.

https://shop.bitmain.com/product/detail?pid=00020231212155051379R2N3JfQc065A


below is the highest power s19 3247 watts

https://shop.bitmain.com/product/detail?pid=00020230626114337330962EtM9r0640

so 253 watts more.


after running a lot of antminers I know some are better and some are worse.

So a rated 3500 watt unit will sometimes do 3650 watts.

Absolutely, we got and Sample unit few days ago and couldn't get nowhere near 3500w @200ths.
Power usage 3800-3900w.
Best Efficiency got on low power mode 160 th/s @ 2600w what is 16.4 j/ths which very efficient

yeah and 3800-3900 is within 10% of 3500 so they are covered.  but my question is I see the end on the miner side.  what is the cable on the wall/pdu side I would guess it need to be 10ga or a very short 12ga if I am pulling 3900 watts on a 208 volt  that is 18.75 amps which is a lot for a 12 gauge c19/c20 cable.

could you photo the power cable on the power connection side?

[FP91G]

could you photo the power cable on the power connection side?

This is a power cord specially designed for the Antminer S21 miner and used for the Antminer S21 power supply. This power interface uses a new type of power plug completely different from the 17 series and 19 series miner power cord
https://www.zeusbtc.com/ASIC-Miner-Repair/Parts-Tools-Details.asp?ID=3247




But such sockets are very expensive in my opinion.

[philipma1957]

well then the s21 as I understand that cable can not be legal to run.

looks like a c14 custom end.

I am not aware of any 20 amp rated c14 plugs.

and a 20 amp plug is derated to 16.

16 x 208 = 3328

and the s21 pulls 3500 to 3900


so I see issues.

let me check what they spec power to the s21 maybe they say

230-277


https://shop.bitmain.com/product/detail?pid=00020231212155051379R2N3JfQc065A


reads 220 to 277

so 220 x 16 is 3520

which means a c20 to new end is barely legal

[danieleither]

I have ordered 24 x S21 195T. I asked Bitmain about the power cord and this was their response:

"Here is S21 Power cord. It will come with miner."



For those that can not view the image / link for any reason, it shows a diagram of a C20 to P13-4 pin power cord, which will plug into a PDU with C19 outlets.

[philipma1957]

I have ordered 24 x S21 195T. I asked Bitmain about the power cord and this was their response:

"Here is S21 Power cord. It will come with miner."

https://imgur.com/a/LbCCpSA

For those that can not view the image / link for any reason, it shows a diagram of a C20 to P13-4 pin power cord, which will plug into a PDU with C19 outlets.

So having 240 to 250 volt vs 220 to 230 volt will really help amps.

240volt x 15 amps is 3600 watts which may be enough may not if you pull 3900 watts

3900/240 = 16.25

right on the edges

of okay.

[FP91G]

I'll add danieleither's picture to the discussion


Specifications   200T 3500W 17.5J/T
https://shop.bitmain.com/product/detail?pid=00020231212155051379R2N3JfQc065A
3500/220  that's almost 16 amps
3900/220 that's almost 18 amps

And why make a new power connector if the C20 connector handles 20 amps perfectly?
New ASICs are no longer suitable for standard household outlets

[philipma1957]

I'll add danieleither's picture to the discussion


Specifications   200T 3500W 17.5J/T
https://shop.bitmain.com/product/detail?pid=00020231212155051379R2N3JfQc065A
3500/220  that's almost 16 amps
3900/220 that's almost 18 amps

And why make a new power connector if the C20 connector handles 20 amps perfectly?
New ASICs are no longer suitable for standard household outlets

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

[FP91G]

I'll add danieleither's picture to the discussion


Specifications   200T 3500W 17.5J/T
https://shop.bitmain.com/product/detail?pid=00020231212155051379R2N3JfQc065A
3500/220  that's almost 16 amps
3900/220 that's almost 18 amps

And why make a new power connector if the C20 connector handles 20 amps perfectly?
New ASICs are no longer suitable for standard household outlets

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

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?

[philipma1957]

I'll add danieleither's picture to the discussion


Specifications   200T 3500W 17.5J/T
https://shop.bitmain.com/product/detail?pid=00020231212155051379R2N3JfQc065A
3500/220  that's almost 16 amps
3900/220 that's almost 18 amps

And why make a new power connector if the C20 connector handles 20 amps perfectly?
New ASICs are no longer suitable for standard household outlets

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

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?

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

[FP91G]

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.

[mineshop.eu]

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.

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]

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.

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?

[Sergeant Major]

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.

[philipma1957]

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.

they will be very loud.


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

[FP91G]

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.

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.

[Sergeant Major]

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!

[danieleither]

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.

[BitcoinSoloMiner]

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.

have you any firmware sourced? to increase efficiency?