I am having difficulty getting my two AMD 4600's to run cgminner.

My current script is: -d 0 -l 1 -v 1 -w 256 -T

I also am setting my GPU percent to 100 and my objects to 1

I am getting an error which is telling me to decrease TC or Increase LG. I have tried changing my work to 64 as another topic pointed out with the same luck.

Help me coin masters, you're my only hope!

Thank you

http://alpha-t.net

How would this impact the scrypt currencies? 

im mining with 3X R9 290, i used to mining litecoin and some others, i use same sitting for all of them , but today i keep getting Error -4 on cgminer, it is saying my thread concurrency is too high, i got no idea for this. my setting worked for all other coins, why not Mincoin? can anyone help?

here is my setting:

 -I 20 -g 1 --worksize 512 --thread-concurrency 27400 --gpu-powertune 20 --gpu-engine 960 --gpu-memclock 1250 --lookup-gap 2 --gpu-platform 0 --gpu-fan 75

thanks!
 

I just wanted to test if it was possible to mine with my AMD A-8 APU on my laptop

Doing about 100 khash stable! 

Tho its hitting 90+ Celsius so i have to stand it on the side in a cold room hehe 

Here is my reposted video featuring the DE5 Net, a development kit from Terasic that has an Altera Stratix V as its FPGA.

The price tag for the chip and board is 8-9k USD, and the Quartus II software necessary to write to the Stratix V is 4000 for a subscription.

However, there are a few things that make me think this is still probably worth the price:

1) I truly believe with a few upgrades to the qdrii sram and improvements in code, it could handle anywhere from 15-40 MH. The Stratix V is certainly equipped to do it, it's a question of how upgradeable the qdrii sram is.

2) It runs on like 30w electricity and is portable in a briefcase.

3) the cost of 40 GPUs, 5-6 motherboards and PSUs, 15kw of electricity etc.. makes GPU mining wasteful and expensive

4) This FPGA dev kit likely has resale value in high frequency trading markets.

If you have questions about this content, please email me at jtshana92@gmail.com

http://youtu.be/hjDYBxleGUk

• AMD Drivers
• AMD APP SDK Runtime

SOLUTION: I got it to work by setting worksize to 64 ( -w 64)

Does anyone know best settings?

Thanks

I will be adding to/coherently organizing this when I have more time, but for now it is good to start the discussion.

The Scrypt Algorithm: A Primer

(http://www.tarsnap.com/scrypt/scrypt.pdf) (main site)

(http://www.tarsnap.com/scrypt/scrypt.pdf) (white paper)

Scrypt was created by Colin Percival in May 2009 in an attempt to make a much more secure encryption mechanism than PBKDF2 and bcrypt. "Secure" is used here in the sense of being extremely expensive in both time and hardware to decrypt without the cryptographic key used to gain access to the information that has been encrypted.

Q: What does this mean?

It means that compared to other encryption mechanisms (say SHA256, Bitcoin's), it is many thousands of times more expensive to "attack" a person's encrypted data by trying to guess their password by trying millions of guesses. This is called brute forcing.

Q: But why?

The way I've read it so far, scrypt is "sequentially memory-hard" (it stores a lot of data in RAM during hashing). Specialized RAM is super expensive because engineers want to be paid a lot of money for trying to figure out how to make it store more data quickly. In fact, Percival estimates that it would take $19 billion USD in technology and electricity and one year of time to use all possible guesses on a scrypt-encrypted, 8 character password string. That's expensive compared to a password encrypted in bcrypt or PBKDF2 (millions and thousands respectively).

Q: Why is scrypt so hard to attack?

This question is above my head currently. You should read the white paper published freely by Percival, and you should also read D.J. Bernstein's work on salsa20, the scrambling function in scrypt. (http://cr.yp.to/salsa20.html)

Q: What does this have to do with MinCoin?

Roughly every minute, a block is successfully mined and reported to the MinCoin network. Transactions reported to the network are stored in blocks. To prevent people from spamming fake transactions to the network, transactions are verified with cryptographic keys, which are hard to fraudulently make unless you are the true owner. This is the cryptography part of cryptocurrencies that makes them so useful and valuable- encrypted bits of data are valuable because they are so secure and unreproducible that they simulate owning a physical object of value (USD, gold, cake, whatever).

I will eventually make both a simpler and more technical discussion of the algorithm here.

Please reply/pm/email me with any questions you have about this material!