Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 200. (Read 528055 times)

maybe start again by switching psu off for 20 min, then try again. Sometimes recovery is possible (if controller overheated from low fan) plus check if you actually have internet connection and ethernet cable is properly engaged (the connector is a little flimsy).

Neither works. Reset does not work. Holding reset down makes a beep and then red + green LED on front stay solid. If i tap the green button thing to the left those lights come off. At no time am I able to connect to the device..

you got what could be described as SMD (sudden miner death syndrome)-depicted here by AriesIV and others (in his case, bad miner even killed a good controller). I had a spontaneous recovery in such case (after resetting router and bridge), but others did not succeed. Someone also reinstalled the same OP system again and someone was rec by Bitmain to try pinging in Network pane to no avail.

you cannot connect to it after reset? or can connect with no hashing?

home mining days are going or gone, sad to say it but it;s just the truth.

at my part of the world i get 240V just like uk so a tad better.

still no techies to reply my earlier posts ?

i bet that certain miners can be oc'ed safely, some partially & some can't be oc'ed. i got a feeling that it's related to production hence the different batches with different clocks.

what' the max freq to oc safely ? hmmmmm

i thought over 625mhz is in the danger zone but now voila 700mhz. it's pretty dependent on the input voltages via pcie. make sure it's +12V or more if considering to OC any of the s7's. i still run mine at stock speed.

Well, after 2 weeks of steady hashing and perfect functionality, my S7 (Batch 3) suddenly stopped hashing and has bricked.
All front-facing LEDs are off now, and the only LED that is on is a steady red light on the main control circuit board on the top of the device.
The fan is on very low, and I cannot connect to the miner via its IP address any longer. The PSU (AW3) works just fine.

The miner was running on factory default settings the whole time, and temperatures were well within range of normal use.

Pushing in the hard reset button for 10 sec. resulted in a beep followed by the front two LEDs (green & orange) staying on and not blinking with the red light still on on the controller. After repowering, the front LEDs remain off.

Any ideas on how to fix this, or what caused it?

Totally agree.

And yes, you make a good point with the cloth insulation on wiring in much older homes.  That's also why I was mentioning the word "heat" several times.  I'm assuming people would feel the outlet for the heat I mentioned.

The question is not the electric grid, it's the wiring in the house. The grid can handle multi-megawatt power surges without issues. However, most new homes in the US have 14g or 12g wiring with various insulations that melt at different temps. Older homes are much, much worse with cloth insulation or wire you wouldn't put in a lamp today.

Europe likely has the same wiring. As a test, feel your plug and see how warm it is. I'm not saying everyone's house will explode, but you're pushing the limits on a lot of wiring with those wattages. You better know what's behind the wall. For 6500 watts you should be using 6g wire, not 14.

I'm curious...

In a typical single family home in Europe with 3 bedrooms and 1 or 2 baths, is there normally 200 amps available in the Main Service Panel?  Also, are the breakers pretty much similar to the U.S.?  Meaning, do you have 15 amp breakers on 14 AWG wiring, 20 amp breakers on 12 AWG wiring, 30 amp breakers on 10 AWG wiring, etc...?

Yap, in Europe electric grid is strong.
My basement can easily hold 5 x S7

Do not worry. Europe does not have this problem.

If you are talking about circuits inside U.S. homes, 15 amps x 120 volts = 1,800 watts.  A 1300 watt rig would consume 72.2% of an 1800 watt/15 amp circuit.  That's approximately 3% under the 75% recommendation by the NEC for a 15 amp circuit with 14 AWG wiring.  

If they have other devices (lamp, clock, etc...) plugged into other outlets on the same circuit, there will not be as much heat as you might think at that one outlet the PSU(s) is plugged into when powering one S7.  Most of the heat would be at the breaker in the Main Service Panel (MSP) while the current is distributed to multiple outlets for that circuit.  It is the circuit breaker that would be at fault of any potential fire [For not tripping].  You are mistaken if you think the PSU(s) and rig would catch on fire for pulling only 72% of the available current for that circuit.

Even if the circuit is a "loop" circuit instead of a "branched" circuit [with the rig being the first device in the loop] there could potentially be quite a bit of heat at the outlet the rig is plugged into.  Yes, in that case, there would be a lot of heat at the breaker and the wire leading up to the first outlet in the circuit.  Then less and less heat for each outlet after the first in the loop, providing the rig was plugged in the first outlet in the loop closest to the breaker.  Is this the fault of the rig?  No...  It's the fault of the owner if old defective wire catches fire.  It could potentially be the fault of the manufacturer of the breaker under certain circumstances.

As the customer plugs in and turns on more devices at different outlets on the same circuit, the circuit breaker should trip once 15 or more amps flowed on that circuit.  If it does not trip and a fire is created, it will not be at the outlet where the rigs are located.  It would be in the MSP where the defective breaker is located.  This is assuming the wire gauge in the home is 14 AWG.  If the wiring is old in the home, that's the home owner's fault for running devices on defective wiring.  It's not the manufacturer of the device fault.

It is my opinion that one should proceed with caution when mining with multiple S7's.  In that case [Multiple S7's] one should consider creating a space with circuits dedicated just for the rigs; preferably with a 240 Volt circuit(s) and PDU's or whips.

༼ つ ◕_◕ ༽つ  I have it on a hotkey on my keyboard, ah the wonderful world of raising your dongers, https://www.reddit.com/r/raiseyourdongers , and I believe there is a japanese list of these images somewhere

At almost 1300 watts I think I'm done chasing the mining train. I may have mentioned it before, but most home outlets let you pull about 1200-1300 watts for the entire room (circuit). That means you're asking your ancient home wiring to pull 100% for 24/7 mining. Fires are a real possibility once you get in this range. Imagine all the 17 yr old kids that have a few BTC, order a S7, and plug it into their mom's basement unknowingly overloading the circuit like a Christmas tree with too many lights. Spark, spark, and two huge fans to kick the flame up. Now you're looking at a home burning down and possible lawsuits, though with BM being in China a successful suit is unlikely.

they already sent B5 and B4 is coming today.

if this is the case,, they need to send me my   sh**t 

There are most likely no real batches-there are two machines with 135 and 162154 chips respectfully, which engineers/marketing sliced and diced into "batches" based on individual machine variability.

└(°ᴥ°)┘     nothing to do with btc but how did you draw this?


batch 8 is open!


https://www.bitmaintech.com/productDetail.htm?pid=000201511170341298180m44675v0613

4.73btc for a 4730 gh machine? uses 1293 watts

It didn't work.

Stay the hell away. Matt Carson is involved with them.... and if he is, they're definitely dodgy as well

Typical hash rate and power

Voltage(V) Hash Rate(GH/S) Current(A) Total power(W) W/GH
0.71             38.75                14.350     10.189            0.263
0.66             32.50                10.760      7.102             0.219

hmmm ?

B7 - 162 chips - 1278W - Rated Voltage: 12.0V+5%, should not be less than 12.0V

B8 - 135 chips - 1293W - Rated Voltage: 11.60 ~13.00V

what's going on ? techies, chime in