Topic: Ultra-Low-Cost DIY FPGA Miner - 175MH/s @ $1/MH - page 10. (Read 125898 times)
Is it available for sale?
Just wondering, what OS, programs, and other stuff are you running. Let's say I have the hardware (which I obviously don't). How would you set this up from a flash drive?
We should start an FPGA screenshot thread..
I started one: https://bitcointalksearch.org/topic/algorithmically-placed-fpga-miner-255mhschip-supports-all-known-boards-49971
What software did you use to generate that? Doesn't look like fpga_editor...
PlanAhead.. it's OK, but I do miss fpga_editor
We should start an FPGA screenshot thread.. I'd love to see what ArtForz's 195MH/s design
looks like..
-rph
it looks like MR. Zetx generated a nearly 200M design.....
3input adder
I'd be interested in this as well
What software did you use to generate that? Doesn't look like fpga_editor...
PlanAhead.. it's OK, but I do miss fpga_editor
We should start an FPGA screenshot thread.. I'd love to see what ArtForz's 195MH/s design
looks like..
-rph
While I'm waiting on PCBs and parts.. here's some eye candy from the VHDL design.
The first SHA256 pipeline is a nested figure-8
-rph
The first SHA256 pipeline is a nested figure-8
-rph
Wow, almost looks like a smiley-face!
What software did you use to generate that? Doesn't look like fpga_editor...
While I'm waiting on PCBs and parts.. here's some eye candy from the VHDL design.
The first SHA256 pipeline is a nested figure-8
-rph
The first SHA256 pipeline is a nested figure-8
-rph
I guess at some point we'll find out how many people really, truly are getting "free electricity".
Yeah, seems like a much larger number than I expected.
Oh, I don't think the current hashrate is indicative of that just yet.
The hashrate is decaying slowly; once it stays still for a whole week I'll start to try to infer things from it.
One factor behind the slow-as-molasses reaction to price is that there are also a lot of people who bought these silly 6-month "mining contracts" with some company that warehouses the machines. The customer has basically paid for 6 months worth of electricity in advance, even if that electricity is now being basically wasted. The mining company doesn't want to let the customer out of the contract because at this point they'll never get anybody else to take their place, and the capital cost situation would be even worse for them than it already is. So the completely wasteful mining goes on and on... but eventually it will stop.
Unfortunately BTC is still a currency in search of an economy..
-rph
-rph
I'm unaware of the mining contracts. Where does one go to buy them?
How many have been sold? How much time before they expire?
thanks.
I'm also watching the total hash rate. When stabilizes as well as the price, would be a good investing moment in my opinion.
Ah, just wait...
I guess at some point we'll find out how many people really, truly are getting "free electricity".
Yeah, seems like a much larger number than I expected.
Unfortunately BTC is still a currency in search of an economy..
-rph
Just wait until "extended bank holidays" start happening.
I guess at some point we'll find out how many people really, truly are getting "free electricity".
Yeah, seems like a much larger number than I expected.
Oh, I don't think the current hashrate is indicative of that just yet.
The hashrate is decaying slowly; once it stays still for a whole week I'll start to try to infer things from it.
One factor behind the slow-as-molasses reaction to price is that there are also a lot of people who bought these silly 6-month "mining contracts" with some company that warehouses the machines. The customer has basically paid for 6 months worth of electricity in advance, even if that electricity is now being basically wasted. The mining company doesn't want to let the customer out of the contract because at this point they'll never get anybody else to take their place, and the capital cost situation would be even worse for them than it already is. So the completely wasteful mining goes on and on... but eventually it will stop.
Unfortunately BTC is still a currency in search of an economy..
-rph
-rph
Ah, just wait...
I guess at some point we'll find out how many people really, truly are getting "free electricity".
Yeah, seems like a much larger number than I expected.
Unfortunately BTC is still a currency in search of an economy..
-rph
Meanwhile the BTC price is dropping way faster than difficulty.. which is troubling..
Indeed, troubling for me too. It's annoying how the network hashrate (to say nothing of the difficulty, which lags it) rises rapidly with the price but falls back so slowly.
I guess at some point we'll find out how many people really, truly are getting "free electricity".
The 2-cycle-per-stage design is proving difficult to cool 
Ah, yes, I was having that problem back when I went uber-hog-wild with SRL32s.
In all seriousness, do you mean that as a euphemism for "draws too much power" or do you literally mean you're having trouble cooling it? A copper northbridge heatsink (like the one in the photos of my prototype board) and a fan can sink a pretty insane amount of heat.
BTW.. not much other news on this project.. I've been working on the multi-FPGA design,
trying to get an FPGA discount, and negotiating with PCB and assembly houses for
my build.
Meanwhile the BTC price is dropping way faster than difficulty.. which is troubling..
I had to turn off my GPUs as they are heavily underwater at $0.15/kWh
-rph
trying to get an FPGA discount, and negotiating with PCB and assembly houses for
my build.
Meanwhile the BTC price is dropping way faster than difficulty.. which is troubling..
I had to turn off my GPUs as they are heavily underwater at $0.15/kWh
-rph
Neat, but since you don't need adders with more than three inputs and you have to carry-complete every single round (in order to do the right-rotate-and-xor), I'm not sure it makes a big difference for SHA-256...
Well, I am currently trying to speed up the 1-cycle-per-SHA256-stage design, which has a 5-input adder.
The 2-cycle-per-stage design is proving difficult to cool
-rph
Some fun reading for the VHDL/Verilog guys: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.157.8865&rep=rep1&type=pdf
-rph
-rph
more here, will this be of any value?
http://www.wseas.us/e-library/conferences/2005corfu/c1/papers/498-498.pdf
http://www.nsklavos.gr/Papers/%5BJ08%5D.pdf
Some fun reading for the VHDL/Verilog guys: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.157.8865&rep=rep1&type=pdf
Neat, but since you don't need adders with more than three inputs and you have to carry-complete every single round (in order to do the right-rotate-and-xor), I'm not sure it makes a big difference for SHA-256...
The real killer is the shared-subfunction rule for LUT6_2 that forces you to use a slow switchbox route for one of the two carry-chain inputs when doing ternary addition.
Some fun reading for the VHDL/Verilog guys: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.157.8865&rep=rep1&type=pdf
-rph
-rph
Really? I would like to buy some.
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