Bitcoin Forum

According to you, what is the best mining equipment i should buy ?

how much you wana spend

With a proven track-record and reliability -- definitely the A2 Terminator units @ about $1100 for 110Mh/s -- using under 900 watts.

With potential quality issues and buggy firmware -- KNC Titan units -- pricing is about the same per Mh/s -- but using 1/2 the power.

Mmm about 2000us

I would recomend the alchemist 256 MH/s miner ( aound $1300) , keep in mind you need around 5000 watts of avaiable power to run two of these

so i would order just one and test it via your power needs .  

https://litecointalk.org/index.php?topic=24945.0

Ty !! Was a little bit scared to buy from them, heard some bad shit about havlock, financial problems, etc

Do you really need two psu for each miner ?

Unless you can split up the hash to different pools (or coins) -- which maybe you can?  But if not - I think you better off with lower hashing units so that you have more options on coin mining.

Also - does this mean you need to feed one 256Mh/s unit 2500 watts?  That is a lot of power -- definitely would need two circuits - well unless you are going 220V.

With $2K - I would buy two A2 Terminator Units -- each gives you 110Mh/s of hash -- each requires less than 900 watts of power.  Much easier in a home / basement type setting.

A2 would be a bad option to spend so much on since its USED.  who knows how long the previous owner pushed the unit or how much he/she modded it from stock.

If you could stil by an A2 new I would say yes go that route but right now they are not even made anymore.

And yes you would need 2PSU's and two circuits, I don't thing that's a big deal we did this all the time when we ran 7 AMD GPUs off one motherboard  , its pretty much the same thing

and look you're getting 256 mh/s that's like 50 GPUs on scrypt.

I've bought over a dozen A2 Terminators -- all used -- at $800 to $1500 each (over the last 8 months).  Not a single issue with any of them.

The one who buys a new miner -- usually pays a big price.

At least with a used unit - you know it works.  I'm not sure how you could burn an A2 unit out -- unless you tinker with the circuit.  From what I've read, it has automatic shutdown on cores if they get too hot.

Anyway - this is the easiest route - without requiring a special circuit.  2500 watts of power can be dangerous if you don't know what you are doing and don't have the proper wiring to do it.

I'd buy one of the 256Mh/s miners if I knew I would actually get it.  No escrow, no Paypal, no guarantee.  Shipping is also like $260 or so?  They you need two good PSUs?  Add what another $300 or more?  So now we are at $1560 and I still don't have a guarantee it will make it to my house in one piece or even work.

Thank you very much, just to be clear, are you sayin that i need special circuit even if a i have to PSU ? Im in Canada and we only have access to 110v so i dont want to have to change electricity at home. I want 2 miner (alchemist or terminator) with 2 PSU each. Is it possible with normal electricity circuit?

Another thing, is it possible to plug these miner on a wifi network ? I have wifi at home and would like to put the miner in the basement. I have usb antennas?

TY

Well a typical circuit may accommodate 1500 to 1800 watts.  So you need two circuits.

If i plug 1 psu in a wall mount and the other in another wall mount, do you consider this like 2 circuits? Sorry im a social worker so i dont have skills in electricity

No - multiple electrical outlets in a room will most likely go to the same circuit (or breaker).  It is unlikely you will find two separate 15 amp or 20 amp circuits in the same room of a house - except for maybe the laundry room (washer on one circuit and other outlets on another).

I find it just too close for comfort to put more than 1000 watts on single electrical outlet 24/7.  The plug and outlet will get warm or even hot to the touch.  You definitely don't want to run an extension cord to another electrical circuit.

and you want to make sure they are only being used by that miner and running two 110 15 amp will work and are not that hard to run if your box has the room . might cost if you know how to do it your self in parts maybe 60 bucks. 1000 watts is fine  24/7 you don't want to go over 1800  before issue start to be safe only use those 110 for mining. i do think what he mean buy any thing over a 1000 watts if they are sharing then that's unsafe . . i run two s5 on one 110 20 amp 24 /7 and have the other 110 for my other S5 i can plug one more into that 110 I'm safe. trust me i had 3000 watts on a 110 that got warm before i found out how bad that was once i did i had my friend come with in hours and run those 110 for me and check things out for me, I do in fact consider my self very lucky nothing more happen then a pop breaker when ever something  else in the house on the breaker came on . but now i have two 110 run that are just for mining and that's all i use them for . Just had a subpanel installed with 2  240 @ 30 amp and one at 40 amps with the two 110 running out of that subpanel. and planing how I'm gonna use those 240 the safe way. i may buy two silver fish miner that run at 264 watts and can plug them  into each 110 with  three miners one silver fish and 2 S5 each im ok . till I plan out how i want to use those 240 .

If you know where the fuse box or breaker box in your home is, take out one fuse or trip one breaker.  Now find an outlet that doesn't work without it, put the fuse back or turn the breaker back on, and take out a different fuse or trip a different breaker.  Then find an outlet that doesn't work without *THAT* one. 

There you have two outlets that are on different circuits.  And while you're at it, you can  make sure that each is good for the 2500 watts.  (you have 110v power?  Look for at least a 30A fuse or breaker switch, more depending on what else you want to put on that circuit.)

I'm not an electrician -- but if you still have a "fuse box" and not modern breakers -- couldn't this pose a hazard?  In addition, the wiring could be old "knob and tube" -- yet another thing to work about.

breakers are safer, I was told by a Electrician, and fuses I have no idea, he can goggle it maybe .


 i do know your right about the wiring , we had a house in PA Once and  my dad before he died rewrited the whole house to breakers. then we sold it and  moved back to Maryland, i was really young then and gave it no mind.

cool i never knew 110v  breakers had 30 amps i might look into that, I'm still learning little late in life, but am .




Can they be used in the US  ? .




nice  http://www.homedepot.com/p/Square-D-Homeline-30-Amp-Single-Pole-Circuit-Breaker-HOM130CP/202353319   yup to both question .:). also found out i don't want to go over 30 amps in a house 40 and 50 might be used more in boats and trailors in the US and it's  safer to install a 240 30 amp at that point if you can.



TY for pointing that out . :) .

do not use a 30amp breaker on an existing house 110-120v circuit.  Your house wiring is likely 14ga or 12ga if very lucky.  Regardless the likelyhood is these wires will burn before the 30amp breaker would trip and your house will burn down. 

Ya, we have 10ga and 8ga wiring, but our house was rewired just two years ago and I'm paranoid about such things....  We paid extra. 

no worry i  know i would have to rewire to 10/2 or lower if I was even going to use A  110v 30 amps id go to a 240 30 amp first and use it right, which Ive done  , i had a SUb put in i think i said above and starting to use it . :) .


I learn fast only thing i won't do and don't feel safe doing is wiring it self . my friend does and rewired his whole house a while back So i know i can trust him . in my state i looked the other day home owners don't need a permit and can do any thing they want to there existing wiring service inside the house, beyond that i need a permit etc.

Wow - no permit required for indoor wiring?  Very surprised.

Not too unusual for USA.  Homeowners can do whatever they like to the house, because if it catches fire that's their own damn fault and their own damn life.  But it has to be verifiably up to code or he cannot legally sell it, because that would be endangering *other* citizens with his job of wiring, and he doesn't have the right to do that.  There's usually a county or city ordinance (or even a "neighborhood association" covenant that you signed as part of a contract enabling you to buy a house there) in major metropolitan areas where your house catching fire would endanger anybody who *isn't* you, but the state codes as opposed to city or county codes don't usually require anything more than up-to-code before sale.

In the same way most states have helmet laws for motorcyclists but some only have laws that say you have to use goggles or equivalent to protect your eyes.  The idea is that if you go face first into the pavement while not wearing a helmet, that's your own damn fault and your own damn life.  The helmet makes no difference to how much of a hazard you present other drivers.  But if you get blinded, that makes you *MORE* of a hazard to the other drivers than you'd be without the goggles and while you have the right to endanger yourself you haven't the right to endanger others.   Helmet laws are universal in states where the public picks up much of the bill for emergency medical services though.  In that case your lack of a helmet is costing other citizens tax money and while they don't give a rat's ass if you die of your *own* stupidity, you don't have a right to be irresponsible at others' expense.

Ahh - I get what you mean.  So, right, you can do what you want inside your house -- just make sure you have it up to code if you sell it -- otherwise you could get sued or worse.

I'm so worried about even a surge protector going past 1000 watts or a plug feeling warm -- in the basement of my house.  I've got temperature monitors, smoke monitors, cameras, everything - lol - just to make sure there are no issues.  Always good to have an electrical fire extinguisher nearby.

The miners imported into the US -- they aren't UL listed or anything right?  Perhaps that is why I worry so much.

The miners are not UL listed, but they don't need to be. 

The power supplies that people hook up to them?  THOSE have to be UL listed. 

Thanks for the info.  Somehow I always thought that they would inspect the whole device -- and not just the PSU.

it is up to code just because i saved a few bucks does not mean its not, i used the right wire  right breaker made sure of everything once i found out how bad things could have been for me . just make dam sure or pay some one as every tells you. this is going to be the last house i ever live in so I have to live here the rest of my life. but if you really want to get down to it. I'm going to a lawyer tomorrow to find out just how to go about reporting any thing l make etc sense, I am starting to make a fair amount that might raise eye blows with the IRS etc and by law any thing you make no mater how much has to be reported income is income.

 but i do in fact want every thing legal. I only use UL listed PSU, PSU for PC i pay that little bit extra then buy a server PSU i actually feel safer buying a ATX PSU over the ones i run wires from UL listed or not and use one PSU per miner to be safe and that one PSU Is usually over kill for that miner. etc etc . the last thing  i want is my house burning down because of some thing stupid, i did and sense i don't work I am retired anytime I leave the house I turn off all the miner to be even more safe that little bit, i may lose in BTC is better then my house going up in smoke. as I said when i find out some thing im doing is wrong or that is wrong, i have it fixed or fix it my self if i know I can and it is aloud by law.



In fact the state was here not more then two month ago, we had the Power company do some thing in the house that requires the state to come in and look and they told me every thing is fine .

get one of these

 http://www.amazon.com/Kill---Watt-PS-10-Electric-Power/dp/B008VIDS34/ref=sr_1_83?s=hi&ie=UTF8&qid=1428382794&sr=1-83

they actually work, if it is overloaded at the surge protector or have a surge protector installed at the breaker box per breaker your worried about for double protection,  make sure your main box or sub panel  supports it, etc.

knowledge is golden once you know you know.  


techly  don't go over 1800 watts for a 15 amp breaker 110 and and 1900 for a 20 amp 110 or 80 /20 per breaker that's code in the US, it may be 1700 per 15 amp i do know it is 80/20 . for any breaker including 240's.

 never share them with any thing else in your house that causes a fire, after, i found out how bad it could have been for me, i won't ever use any breaker this way with anything else again, if i do, I will only use one miner,  I will make sure that breaker is one that has very little on it, maybe two things that are used off and on every two days or so, but people do it all the time then wonder why the breaker pops or ask how to stop it without running a new line and i would say, as some one else said, above, don't use a 30 amp 110 in your house from what i read they kind of are not meant for homes beyond boats etc .. if you are going up to 30 amp just have a 240 installed and be safe, cost is about the same, all but the wire.   just be safe and make sure, even after it's done, monitor it every day don't trust any thing any body does even if they have the right Permits etc.

 I see you do, wow, that's a lot of monitoring. LMAO, can never be to safe.  ::) :-X    IMO  every house should have one or two electrical fire extinguisher, mining or not, we have two.

I think most kill a watts are rated for 120 volts so i won't recommend using it on a double pole 30 or 20 amp(240 volts)

I think this is where people get in trouble.


So you shouldn't have a single miner draw more than 1440 watts on a 15 amp circuit.  I think this would also be the same thing if you had two miners on one surge protector.

Another issue -- which is a big fire hazard -- I have had miners hit 950 watts and the power cord actually starts to leave burnt marks on the outlet over time.  Make sure your power cable stays cool and is good and thick.  I've seen some that are thin and get hot to the touch quickly with that much wattage.  If your room is hot, the cable gets hotter and then eventually can cause trouble.

Actually depends on the volts but yea 15amp 120 volts you would get around 1400 safe wattage.on the other hand 240 15amp about 2800 safe wattage
That's all assuming you have everything wired right from fastened, to proper gauge wire, connected to the outlet which is rated for that load, and have the breakers set up correctly.