Mining Hardware on 120V

[cfkrel02]

I live in an apartment with unmetered electricity. I obviously can't pay an electrician to come in and do wiring since it's a unit in a large apartment building. I've done a lot of searching on google and this forum and haven't come up with a good answer to my question... but I do apologize if this was ever discussed elsewhere on here.

The bottom line is I have a little bit of expendable cash, I'm interested in mining, and I don't necessarily need efficiency. I'm pretty handy when it comes to computers and electronics, although I would like something stand-alone if that even exists in my niche. I'm wondering if anyone can suggest or recommend any rigs that would even be mildly profitable that I could join a pool with while using a 120V outlet. Because I don't need to pay for electricity, I'm just more interested in a rig or a couple of rigs that I can break even on just in terms of what I would have to shell out for hardware.

Thoughts?

[1715188570]

1715188570

[philipma1957]

Okay you want a modified s9.  It is cheap and can be quiet. It make money with free power.  Not much money but money none the less.

three threads on them

https://bitcointalk.org/index.php?topic=5213936.0

https://bitcointalk.org/index.php?topic=5230865.0

https://bitcointalk.org/index.php?topic=5160194.0

there is also the r606

https://bitcointalk.org/index.php?topic=5160194.0

[Steamtyme]

Do you know what sort of circuits you have available and how close together they are?? When I first started out there were a lot of people running s9's on 110/120 by splitting the load across 2 circuits using 2 psu's. You should have a small sub panel in a closet or something that gives you an idea of how many circuits you have available.

Iirc they were mostly using PC psu's. I'll try and find some of the old threads as you had to be sure to power them on in a particular order ( based on which one is powering the control board)

[philipma1957]

Do you know what sort of circuits you have available and how close together they are?? When I first started out there were a lot of people running s9's on 110/120 by splitting the load across 2 circuits using 2 psu's. You should have a small sub panel in a closet or something that gives you an idea of how many circuits you have available.

Iirc they were mostly using PC psu's. I'll try and find some of the old threads as you had to be sure to power them on in a particular order ( based on which one is powering the control board)

yeah an extension cord to a second circuit in another room could work. but is riskier then a modded s9

with one psu and one board.

[Steamtyme]

Yes for sure there is the added risk, but is still a viable option especially if they would like to breakeven in the end. It's been a while but I can't even remember off the top of my head what these are drawing now with the brains OS. 
I know you've played around with a ton of these. I'm at work on my phone but I'm wondering if you can get 2 boards down around 800-900w. That would fit nicely on a 110 circuit. It's gotta be close depending on the model, but one of the 13.5TH units I think would get that low with 2 boards.

[philipma1957]

Yes for sure there is the added risk, but is still a viable option especially if they would like to breakeven in the end. It's been a while but I can't even remember off the top of my head what these are drawing now with the brains OS.  
I know you've played around with a ton of these. I'm at work on my phone but I'm wondering if you can get 2 boards down around 800-900w. That would fit nicely on a 110 circuit. It's gotta be close depending on the model, but one of the 13.5TH units I think would get that low with 2 boards.

I have done 815 watts 3 boards with braiins. 10 th. lasted that way for 3 months a board died

I now do 6.5th and 535 watts same machine. that is about 83 watts a th.     this is the only braiins os I have it is the only non-bm firmware I use on 1 ant miner.

The bm firmware from summer of 2019. has decent protection against virus and it does 10 th lowest setting and about 900 watts you could run one of them on an apw3++ and 120 volts hit or miss.

here are 4 screen shots of a miner set to low power on bm firmware it is an s9i model

this unit is up in Clifton NJ about 70 miles from my home I use TeamViewer to run it.

it is set to lowest setting there is
https://i.imgur.com/CloliiP.png
https://i.imgur.com/OWPLeWz.png

summer 2019 firmware
https://i.imgur.com/eJyMNIw.png

it does 9.75 hash very low errors.    0.0017 is low errors
https://i.imgur.com/ntxLkj3.png


will this run on 120 volts maybe maybe no depends on wire quality and psu quality.  but if you unplug the middle board it will run fine.

you will drop to 6.3 or 6.5 th which is earning. 6.5 x 15 = 97 cents soon to drop to 48 cents. that is 15 a month s9's are selling for 90 on eBay with a psu so it is six month roi

once 1/2 ing comes. you could pay as low as 70 for them with a psu. which is 5 month pay back.

I was going to get 68 of these for free but to cover-19 lockdown stopped me from being able to drive to Tennessee to pick them up [only way to get them].  sad but true.

I would have made a ton of modded ones

[cfkrel02]

Thank you all for the replies! I'd like to stay safe, so at this point I may just look into mining some non-ASIC alt-coins.

[Artemis3]

Yes for sure there is the added risk, but is still a viable option especially if they would like to breakeven in the end. It's been a while but I can't even remember off the top of my head what these are drawing now with the brains OS.  
I know you've played around with a ton of these. I'm at work on my phone but I'm wondering if you can get 2 boards down around 800-900w. That would fit nicely on a 110 circuit. It's gotta be close depending on the model, but one of the 13.5TH units I think would get that low with 2 boards.

You definitely can do 800W with 3 boards if you force the miner down to about 10TH/s or less. Less boards should be easier (the R4 was essentially an S9 with 2 boards and a scroll fan).

Given the amount of super cheap S9s right now flooding the market, the best bet for OP is to purchase an used S9 with damaged or missing hashboards. One with 1 or 2 hashboards should do the trick even with factory firmware.