"Field Programmable Gate Array" - A digital integrated circuit designed to be configured after manufacture. Essentially allows one chip to be turned into a different chip. FPGAs are a highly power efficient method of mining Bitcoins, though they have a significantly higher initial cost than many ...

learn more… | top users | synonyms

7
votes
2answers
247 views

Why can't they use super computers to mine all the bitcoins?

I have very limited knowledge of bitcoin, but, I hope you don't mind my asking this question: As I understand it, "mining bitcoin" requires "significant" computational prowess. A lot of dedicated ...
2
votes
1answer
106 views

Can an FPGA for mining be used to crack deterministic keys?

Deterministic keys are based on the sha256 hashing function. As described in the link below deterministic keys use the same hashing function. https://en.bitcoin.it/wiki/Deterministic_wallet Is it ...
1
vote
2answers
148 views

RAM FPGA/ASIC miner?

Just out of curiosity, would it be possible to ( with a computer that has a large amount of RAM ) use that RAM and treat it as an FPGA capable of mining other cryptocurrencies, or would it be too ...
1
vote
0answers
138 views

How has mining evolved since the start of Bitcoin?

Can someone post a detailed description on how mining has evolved since the introduction of Bitcoin all the way till today? I mean quantity of miners, hardware used, profits made, ROI etc. I guess ...
1
vote
2answers
993 views

Why is a GPU a better tool for bitcoin mining than a CPU and is an FPGA better than both?

I was looking into the best tools for bitcoin mining and found out that GPUs are a better tool for bitcoin mining than CPU's. What is the reason for this? furthermore, I found dedicated chips that ...
7
votes
2answers
10k views

Can ASIC or FPGA boards be used to mine Litecoin?

I know that Litecoin was designed to be mined with a CPU but then someone figured out how to mine it with a GPU. Has anyone figure out how to mine Litecoin with an ASIC or FPGA boards, and if not is ...
0
votes
0answers
42 views

Converting an FPGA Board into a Bitcoin Miner [duplicate]

I have a couple of FPGA Boards lying at my school, and i would love do try out some bitcoin mining with them. Is there a guide, showing how i can set them up to mine bitcoins? The one i have are ...
-1
votes
1answer
195 views

work source hash rate smaller than worker hash rate

Why would my Work Source hash rate be smaller than my worker output hashing rate? I'm using MBPM and my work sources Hashrate is always lower than my X6500Hotplug Hashrate. I'm just looking for a ...
2
votes
2answers
6k views

Bitcoin mining algorithm

I was looking at some sample mining algorithms and also some sample code and there was something which I didnt really understand. In Simple bitcoin mining algorithm he says , The simplest miner would ...
4
votes
1answer
4k views

How to get started with building an fpga mining device

I plan to make an fpga mining device for bitcoin mining just for the fun of it. I thought understanding bitcoin as whole would be the first step to take. However I realize that understanding the ...
3
votes
1answer
210 views

FPGA/ASIC with general SHA-1 and SHA-2 capabilities

With the introduction of ASICs and FPGAs, I am looking to upgrade my rig. However, I use the rig for academic research involving brute-force SHA-1 and SHA-2 cracking (I am working on make passwords ...
1
vote
2answers
925 views

International shipping times for Butterfly Labs ASIC hardware [closed]

The Butterfly Labs FAQ says they use USPS for shipping (except for Mini Rigs), and displays the options "Standard" and "Express" during the checkout process: However, the USPS website appears to ...
0
votes
1answer
759 views

Mining: GetWork, Get Nonce, ???, Submit Hash?

I make a getwork request and get back data, hash1, midstate, and target. Mining on a KC705 development FPGA board, and following the readme.md file here: ...
9
votes
5answers
13k views

When is GPU mining considered not-profitable?

As GPU mining made CPU mining non-profitable, at some point in time more specialized mining hardwares (FPGA and ASIC) would make GPU mining non-profitable. When is GPU mining considered ...
2
votes
1answer
4k views

how to start mining with FPGA

I found that in my university there are some FPGA's available to test and to play with. I am a software/web programmer and I have never been working with verilog or whatever is used to program FPGA. ...
2
votes
1answer
625 views

Shares mostly rejected mining with an FPGA

I am using an FPGA to mine bitcoins in a pool, as you can see below I am not really very successful: [1 accepted, 48 failed, 148.90 +/- 21.27 Mhash/s] It is running at 150 MhZ but I only have 1 ...
11
votes
4answers
4k views

What is more effective than ASIC mining?

Considering that mining progressed from CPU, to GPU, to FPGA, and now ASIC mining... have we finally hit the end of the road for technological advancement? What future optimizations can occur after ...
5
votes
2answers
4k views

BFL Single averages 800 Mhps on BitMinter Client. Advertised rate is 832. What explains the difference?

I'm using a BFL single with the BitMinter client and I never see my Mhps exceed 825 and it often goes down to 780 Mhps. What could be an explanation for this difference? Are the specs on BFL ...
4
votes
3answers
2k views

When will FPGAs and ASICs 'replace' GPUs for mining?

Please explain in detail, or provide an an estimate, at least.
4
votes
2answers
838 views

What other purposes can I use my [obsolete] hashing hardware for?

It's pretty easy to reuse CPUs or Video cards that were previously used for Bitcoin hashing, but what can I do with FPGA hardware when the difficulty becomes too high for it to be worthwhile to mine? ...
2
votes
1answer
1k views

How is a Butterfly Labs Bitforce Single powered?

Its website says it uses 80W of power, so that's too much for a USB port. How does it receive it's power? Can it run on a 240V power supply, or does it need 110V? Note I'm not asking about the newer ...
26
votes
5answers
30k views

Is Butterfly Labs reputable / Should I preorder the SC Jalepeno?

I'm somewhat new to the mining scene but I'm a bit familiar with everything. I see that GPU mining will become much less cost effective over the next year or so, especially around December when the ...
2
votes
1answer
2k views

How many FPGA can be attached to one computer?

I am looking at this. Dual FPGA X6500 Mining Card Rev 3 (Without Heatsinks) So we connect the card via USB and the card will mine? Should I buy one FPGA or several ones? Where do I attach the FPGA? ...
5
votes
1answer
2k views

How do I mine with FPGAs?

I'm not entirely sure how FPGA's work... Do I simply buy a ZTEX and it mines, or do I need to plug it into a computer via USB? Can I chain them? I'm so confused.
9
votes
1answer
521 views

Is there time-to-failure data available for any of the BFL products?

Butterfly Labs (BFL) is offering a few mining products which look to be based on some sort of FPGA or ASIC but I can't find any reliable data on what parts they're using or their manufacturing ...
5
votes
1answer
2k views

Why does the BFL Single produce ~50% stales with P2Pool?

I've heard from users on bitcointalk forums that the BFL single doesn't work with P2Pool as it produces about 50% rejected shares, which is insanely high. Why is this? Is it possible that the ...
3
votes
1answer
378 views

Running Miner as embedded system (No OS) - Can it be done?

I've been messing about with TCP/IP stacks on some fairly powerful MCU's lately (mostly the ARM M4 series), and this sort of led to the crazy idea, that I could somehow create an embedded platform ...
7
votes
3answers
2k views

What software/hardware is required to mine with an FPGA?

I have been looking for a device that would allow me to mine Bitcoins without too much noise and heat. Something relatively small that I could keep in a shelf without worrying too much about it. A ...
15
votes
2answers
10k views

What's the difference between an ASIC and an FPGA? Which is better for mining?

I'm a software guy with only the most basic of hardware training/knowledge so while I understand the basic concepts of ASICs and FPGAs the details are beyond me. What are the primary differences and, ...