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Author Topic: FPGA - profitability vs effeciency?  (Read 1963 times)
FCTaiChi
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May 31, 2013, 03:21:59 PM
 #21

I have all this laid out if anyone hasn't seen: https://bitcointalk.org/index.php?topic=209750.0

Now of course this changes if you are preordered already, or the times change again...  There isn't really anything you can buy at the moment (until the avalon chip order comes in) that will be a better investment than just buying btc.

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May 31, 2013, 03:30:22 PM
 #22

The comparison to one year ago is interesting, meanwhile the Btc today is exchanged at more than $100 so the break even is the same, with just less coins.
It's obvious that on paper an Fpga cannot compete with ASIC technology, the problem is that the vast majority of us got only preorders Smiley

And they don't mine anything Smiley
In my opinion Fpga mining is still profitable if you can setup everything -today- and squeeze the hardware until the ASIC "tsunami".
ASIC mining -today- with the first generation devices is expensive (actually more than Fpga, look at asicminer prices) and will suffer the same problem of everyone else with just a bit smaller electricity bill. With the difference that you have to wait in line losing money very other day.

Agreed, people who are buying ASICminer items at current pricing are more foolish than the current FPGAers.

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May 31, 2013, 04:46:26 PM
 #23

Would still rather at the least a free graphics card come the transition...

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May 31, 2013, 05:23:03 PM
 #24

I have all this laid out if anyone hasn't seen: https://bitcointalk.org/index.php?topic=209750.0

Now of course this changes if you are preordered already, or the times change again...  There isn't really anything you can buy at the moment (until the avalon chip order comes in) that will be a better investment than just buying btc.

Where does this chart take into account the different possible(or any real possible) network hash rate increase. This is the biggest factor people need to see.
FCTaiChi
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May 31, 2013, 09:24:21 PM
 #25

The 5 columns on the far right represent average difficulty through the year from 8%-28%

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June 01, 2013, 07:50:16 AM
 #26

The Blackarrow version has already the "overvolt" modify, change the upper fan with a bigger one (92mm) add a lower fan for the backside. And use a good PSU. With the V42 you shouldn't get anything less than 460-480.
Unfortunately Cgminer can't measure the speed correctly, so you have to count the accepted units (actually more than 3.6 at diff 2).

Keeping stock cooling is worth only an increase from 2.8 to 3.2 (still good) even with a 10% of errors

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June 01, 2013, 08:39:53 AM
 #27

The BFL FPGAs in this shot are doing between 830-877Mh/s that's pretty good, better than any of my GPUs


http://serason.com/BFL1.jpg




http://serason.com/BFL2.jpg


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