I tried to look for a similar thread but couldn't find any so here it goes...

Can a SHA256 or Scrypt ASIC rigs be repurposed/rented out to be used in other industries like Oil & Gas, supercomputer type applications?

Just wondering, if one day there is no more use of a ASIC miner...

I am a newbie in BTC and I read somewhere about "signature campaign".

How do I participate or search for such campaigns?

I noticed that while I am getting decent "Accepted" value, low "Rejected" value but massive "Discarded" value?

What is definition of"Discarded"?

What do I need to do to improve hash rates and reduce discards?

Any impact to my profitability and hash rates, when "Discarded" value is high (currently x2 or x3 of Accepted value)?

Thanks guys - appreciate any guidance

TMT

I have the following ASIC miners and would like to optimise hashing power, sound and heat reduction - hopefully for best mining returns on BTCs.

Below are the configs optimised for least sound and heat, with best possible hashrate.

1. Antminer S5 at 400 Megahertz with default password, current fan speed 3960RPM, each ASIC board with 52-54C average. Stock firmware but default was 350Mhz.
2. 2 x Antminer S7 at 600 Megahertz with password d=42838, current fan speed at 50% running 3720RPM and 3600RPM, each ASIC board with 58-61C average (day), minus 3-4C at night. Firmware installed is the 600Mhz version. The S7s are very loud when running default settings.
3. Innosilicon A2 Terminator 110MH at 1250Mhz with password d=42838, current hash average 115MH, fans speed steady but not as loud as default password.

My questions:
1. The higher the difficulty, the less strain on the miners (SHA256 or Scrypt for that matter), therefore the fans don't speed up and generate less heat - is this correct understanding?
2. Assuming that the higher the difficulty set for the miners, achieving the above #1, the payout rewards are also higher for solving difficult algorithms?
3. What is the optimum d=xxxx for A2 110MH and the S5 and S7s? Is there a table updated given the BTC and LTC network difficulty in November 2015?
4. What is the highest expected BTC return for my setup above?

Any other advise or improvements highly appreciated. All the mining equipment are bought mid-2015.

Thanks guys

TMT

Hi Miners,

My neighbours have now started to complain that the humming sound have become louder from my outdoor rig, consisting of 4 miners (1 x LTC 110mh, S5 x 1, and S7 x 2). Became worse when my newly installed S7s has a whistling sound coming from 1 of the unit.

I don't have a basement. I don't have a closed room either. So an outdoor solution was what I chosen for my rigs. So far no serious heat issues but as soon as I try to reduce the noise by putting all the rigs into a small cabinet (with reasonable amount of fans).... heat increases.

I am looking to redo my rig cage, and apply some best practise for optimum cooling and substantial noise reduction.

Appreciate any suggestions.

TMT