A1 miner is it good

[Bitkingdom]

A friend of mine has a A1 28nm miner that can do 1000gh/s , power consumage is 1000 W that he wants to sell me for 900 $. I checked with coinwarz how much BTC I can mine with it.

It gives my the information

BTC per day 16.02/13.62 $
Electricity 2,4 $

My questions is, is the calculation reliable ? As far I understand the BTC mining difficulty is increasing every 10th-14th day with 10-20 %. Is that correct ?

How long time does it take until I can get my money back if I purchase the A1 from him ? What's your opinion about the A1 miner ? Is it a reliable and good?

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[DrG]

Not really a good deal considering you can buy 2 new Antminer S3 miners for 1.25BTC which is about $700 and they will do about 900GH/s but they will only use 700W (you need to supply a PSU).  Since they use less power they will be more profitable if you have more expensive electricity.  I think the calculator assume $0.10/KWH - is that your rate?

[Bitkingdom]

Not really a good deal considering you can buy 2 new Antminer S3 miners for 1.25BTC which is about $700 and they will do about 900GH/s but they will only use 700W (you need to supply a PSU).  Since they use less power they will be more profitable if you have more expensive electricity.  I think the calculator assume $0.10/KWH - is that your rate?

Actually the power usage is no problem for me since I'm staying in a place with free power.

Which shop are selling the miner you wrote about ?

[DrG]

Not really a good deal considering you can buy 2 new Antminer S3 miners for 1.25BTC which is about $700 and they will do about 900GH/s but they will only use 700W (you need to supply a PSU).  Since they use less power they will be more profitable if you have more expensive electricity.  I think the calculator assume $0.10/KWH - is that your rate?

Actually the power usage is no problem for me since I'm staying in a place with free power.

Which shop are selling the miner you wrote about ?

Look for the Bitmain S3 thread in hardware.

Having free power doesn't mean a magical fairy is going to come into your house and gives you a cold beer and some ice cream.  Your place will get hot and if you have AC then you're OK.  Otherwise that's another expense.

[xstr8guy]

Not really a good deal considering you can buy 2 new Antminer S3 miners for 1.25BTC which is about $700 and they will do about 900GH/s but they will only use 700W (you need to supply a PSU).  Since they use less power they will be more profitable if you have more expensive electricity.  I think the calculator assume $0.10/KWH - is that your rate?

Actually the power usage is no problem for me since I'm staying in a place with free power.

Which shop are selling the miner you wrote about ?

Look for the Bitmain S3 thread in hardware.

Having free power doesn't mean a magical fairy is going to come into your house and gives you a cold beer and some ice cream.  Your place will get hot and if you have AC then you're OK.  Otherwise that's another expense.

DrG, you are so kind and patient! Are you Buddhist by any chance? I had previously mistaken you for a woman, lol, so I'm obviously not very intuitive. But when I read threads like this, I feel such a strong need to DESTROY the OP's fantasy and drag them into the real world. I'm always amazed by how some people can be so nice.

[DrG]

Not really a good deal considering you can buy 2 new Antminer S3 miners for 1.25BTC which is about $700 and they will do about 900GH/s but they will only use 700W (you need to supply a PSU).  Since they use less power they will be more profitable if you have more expensive electricity.  I think the calculator assume $0.10/KWH - is that your rate?

Actually the power usage is no problem for me since I'm staying in a place with free power.

Which shop are selling the miner you wrote about ?

Look for the Bitmain S3 thread in hardware.

Having free power doesn't mean a magical fairy is going to come into your house and gives you a cold beer and some ice cream.  Your place will get hot and if you have AC then you're OK.  Otherwise that's another expense.

DrG, you are so kind and patient! Are you Buddhist by any chance? I had previously mistaken you for a woman, lol, so I'm obviously not very intuitive. But when I read threads like this, I feel such a strong need to DESTROY the OP's fantasy and drag them into the real world. I'm always amazed by how some people can be so nice.

I don't really ascribe to any one faith, just believe there is something out there.

I'm very patient IRL or I would not be able to do my job as a physician (internal medicine) where families and sometimes patients talk in circles without answering my question.  It's 3AM - I was about to sleep and just got an admission.  I can either go to sleep and have the nurse wake me up right as I start to enter REM or I can stay awake and hopefully they can call me soon.  Either way my sleep is screwed 

[Collider]

As described, antminers will be the better deal.

Most S3 do 475GH easily, and many 500Gh. (and every unit does at least 450GH)

The A1 miner should also be much louder (if that is of concern to you).

Dont forget to buy a suitable power supply for the ordered antminers though.

[jonnybravo0311]

As described, antminers will be the better deal.

Most S3 do 475GH easily, and many 500Gh. (and every unit does at least 450GH)

The A1 miner should also be much louder (if that is of concern to you).

Dont forget to buy a suitable power supply for the ordered antminers though.

Just a small correction... most S3s do 440, some are lucky and will do 450, 475 or 500.  Others are not so lucky and will get anywhere between 400 and 430.  Unfortunately, the hash rate on the S3 is a bit more hit and miss than Bitmain's previous products.  Hasn't stopped me from purchasing them, though... they're a nice little unit.