How to calculate profit

[Scr4tchy]

Hello,

I would like to buy FPGA's device to start mining. Which FPGA should I buy, and where ?
I want to know how to calculate my profit too. I already have a pool.

Thanks !

[Stephen Gornick]

Which FPGA should I buy, and where ?

FPGAs purchased today are no longer viable mining hardware, after considering the capacity coming online from ASICs.  ASICs are just that much more cost efficient to procure and operate.

As far as calculating profit, that will depend on future difficulty and future exchange rate, neither of which is known yet.

If you have the specs for an FPGA you can calculate how much it will earn (gross revenue) at the current difficulty:
 - http://tpbitcalc.appspot.com/
 

[Scr4tchy]

Thanks.. No FPGA then

What about these ? https://products.butterflylabs.com Are they fakes ? It seems to be.

[empoweoqwj]

Well, they've taken a great deal of cash without delivering a product and continually put back launch date .... so I guess they are fake if and until they prove otherwise.

Personally, I wouldn't trust them on the "ButterFly" in their name but that's probably just me 

[ijjed]

I prefer Bitcoinx's bitcoin mining profitability calculator. You can be specific with all your informations.

[razorfishsl]

Which FPGA should I buy, and where ?

FPGAs purchased today are no longer viable mining hardware, after considering the capacity coming online from ASICs.  ASICs are just that much more cost efficient to procure and operate.

As far as calculating profit, that will depend on future difficulty and future exchange rate, neither of which is known yet.

If you have the specs for an FPGA you can calculate how much it will earn (gross revenue) at the current difficulty:
 - http://tpbitcalc.appspot.com/
 

That is slightly incorrect.......

You should state FPGA's bit-mining kit  from the major suppliers in not currently cost effective, the actual FPGA's can be had very cheaply on Ebay. and are cost effective when incorporated into a home brew system...

[Stephen Gornick]

That is slightly incorrect.......

You should state FPGA's bit-mining kit  from the major suppliers in not currently cost effective, the actual FPGA's can be had very cheaply on Ebay. and are cost effective when incorporated into a home brew system...

So you believe this line on the right hand side has finished rising then?

 - http://bitcoin.sipa.be/speed-lin-ever.png

Because that spike is even before this metric ton of ASICs about ready to ship will start reaching the hands of thousands of some very anxious miners.
 - http://mineforeman.com/2013/03/29/butterfly-labs-update/

[Edit: So unless you personally will cover the balance between the cost of acquiring an FPGA today and the fraction of a bitcoin it will earn over the next year, then it might be best when you are handing out a prediction about new spending being "cost effective" that you clarify that with the disclaimer that nobody knows the future difficulty nor the future BTC/USD exchange rate to be able to make such predictions.]

[wBlaza1]

hi, i´m using
http://dustcoin.com/mining
it´s quite accurate and u can compare other currencies