Topic: Bitmain Introduces the S17+ and T17+ - page 10. (Read 3388 times)

Ditto.
For me (running 460-480TH) the risk is what happens when a 73TH miner goes down hard: That would be waaay too high of a percentage of my hash rate offline for at a minimum of a few weeks. Unless you are running a farm with 10's-100's of PH losing that much from a single miner failure is unacceptable.

exactly why I would rather see them cut these things in half - I love the efficiency, I just do not like seeing so much hash in one unit would rather have 2 that equal 70 then one that equals 70

But  the funny thing is  the s17 pro 53th is still better then the s17+ 73th
So the purpose of bgger and more power does not really help much

other then a huge farm  since :

1000 s17 pros do 53 x 1000 = 53ph and use 2000 power cords with 1000 eth cables.

800 s17+  do 73 x 800 =       58.4ph and use 1600 power cords with 800 eth cables.

So  there is some savings in cables maybe some in shelf space  if you run a 2.3 mega watt farm.

I get that totally but still, if they keep climbing, a lot of us will have to redo or at least reconsider our electrical wiring and such. I run 30 amp circuits on 220v so I should be ok for a while but at the rate they are climbing, those soon will not be sufficient.

I am presuming they are using one cable to power 1.5 board? With the other one covering the other half. The tricky part would be making sure the fans run, so probably a fail-safe power from both cables 'just in case' with the normal cut off if the temperature reaches X degrees.

You can power-up two boards with from 2 PSU (found this guy who did it https://youtu.be/Af76eBsH35A?t=480/ )

Not sure about the half a board powered by one cable and the other one by another, unless one cable does 2 boards and the other cable the other board and the 4 fans and PSU fans   would love to know more though.

Found this about them https://www.antminerdistribution.com/wp-content/uploads/2019/05/S17-S17-Pro-T17-Server-Manual.pdf but nothing about the power cables (or at least I did not see).

Funny, I have the same problem, I run a 32amp circuit but I pull max 4000W per circuit. with all the new machines running 3000-3300W I'm pretty much in a dilemma. If they made a machine with 2000W with the same efficiency, I'd be happy to put 2 on a circuit and call it a day.

How have they done that design?

Is there a risk for phase-to-phase short circuit if you put your power cords into two different circuits which are on different phases ?

This was something I was worried about when I heard about that design.

And I also worry about how well will the protection work in a fault situation with a two circuit setup. Even if those two circuits would be on same phase.

Another reason why I still like Bitmain is the two power cables (splitting the W's and allowing me to use them, still).

I hope Bitmain will still keep this feature.

Also, I will measure my circuits today to be sure where I stand

They want to move to industrial clients. No more complex then this.

The best units for efficiency are all pulling lots of power.
They are all 220 volts.

S17 50th pro is the lowest power about 2050 watts at middle speed.

S17+ 73 th is high power 2920 watts

M20s. 68 th is 3350 watts

So high power industrial gear is what they push.

I would like to see them produce smaller units - with half the hash and half the power consumption of these current new ones - this would be much easier to incorporate into my mining space. and its much less of a loss should a unit go down.

instead of 73 TH/s with 40 j/th - why not a 35 TH/s with 40 j/th  - just cut these damn things in half.

So, lets get crazy and say two units will run 6000w.
And your "iffy" voltage gets down to 220v

That'll make your two units draw about 27A. Maybe 27.5A

Breaker isnt tripping til 30A. But its close.
Your power would have to drop to 200v to trip your breaker.

10ga wire is rated for 30A, but the 80% rule (24A) is recommended. But, thats put in place due to longer runs.

You'd probably be just fine if your circuit run was short.

But to be safe, 40A breaker with 8ga wire would be recommended for two of these units. But 30A, 10ga can be done if you know what you're doing electrically.

Bitmain does a perfect "Carrot and stick"

Borderline at best  more then likely you will trip your circuit breakers over and over.  running 2 units pulling 6000 watts on a 30 amp circuit is possible but not a good idea.

6000/7200 = 5/6 = 83.333%    which is over code.  This assumes an exact 240 volt output   many of us run from 217 to 227 as the norm.

I have 3 spots with 220/240

One does  217 to 227  this would never work  with 2 units on 1 30 amp circuit.

one does  234 - 237  I would bet against this one not tripping gear out.

one does  237 - 243  this could work.

I have pushed all 3 locations

the 217 to 227  prefers 4800 watts or less on a 30 amp circuit.

the  234-237    can do 5100 watts no issues

the 237-243 can approach 5800 watts in the winter.

there is no way would I try 2 s17+  on 1  30 amp circuit.

I would do 2 s17+ and 1 s9  =  2950 + 1350 = 4300 watts which is no worries

now most of my gear is in clifton which runs in the 217 to 227 volt zone
So I do not try  to get to 5000watts on any circuit.

We also have an issue that low volts occurs  say 190 volts  every 10-14 days for about 10 minutes  we think it is a power station issue  so pushing circuits is simply not justified for us.

If you have a very steady 240 volts in a very cool space maybe you can do 2 of these units and pull about 5840 watts on a 30 amp circuit.  I am sure people will try it and some may do okay.

Sure they can.  A 3000 watt units is 12.5A on a 240v circuit.  Two units pulling 25A on a 30A circuit, run with 10ga wire will be just fine.  24A on 10ga wire is recommended, but if its a short wiring run, say under 25', there should be no problems.

wait, 3kw (on two cables) cannot run on a 30amp breaker if another miner is plugged in on the same breaker(ie. a t17e which draws almost as much)? the circuit is 220v; also, i smell s19's for the halving 

Seems with Bitmain, I cannot place an order for an item..... without a newer, better version being released before the one I ordered even ships

I wonder if they will be listed super high, then do the "actual" sale price and whatever difference in price to the real price, then refund you on your bitmain account like they've done before.

I know some farms have lots of 20amp breakers with a dual 20amp socket. They are a straight drop in power wise.   So pull 28th add 73 th in about two minutes. Also drop one Ethernet cable.

With bitmain dropping so much gear so quickly I now have a clear path to grow the gear.

I buy 1 or 2 s17's a month using paypal to pay for them.
By the ½ ing we will be all s17 gear.  Over 3ph in gear.

These would drop right in at farms that were running old S9s at close to 1500W each.

  It is more industrial and less home friendly.

Also pulling say 3000 watts it would be better on a 20 amp 220 volt circuit vs a 30 amp 220 volt circuit. Most likely I will not be getting it.
I will focus on s17 and s17 pro as the 2225 to 2300 watt draw they do is more attractive to me.