The mining yield is mainly affected by hashrate fluctuation and difficulty adjustment.
1) Hashrate fluctuation: Essentially, hashrate output is an unsteady and fluctuating process during mining. The factors of power, network, miner status will also affect the hashrate considerably, resulting in profit change.
2) Difficulty adjustment: The difficulty of cryptocurrency will be adjusted after a certain period of time with an overall tendency to increase. Therefore, it is general for miners to have less mining yield while maintaining the original hashrate.
How can I set mining difficulty for miners?
1. Set password by “d=1024” to fix the mining difficulty of a miner.
2. Recommended Difficulty = Hashrate (TH/s) × 1000
For instance, Bitmain Antminer S9 has 12T hashrate. Then the recommended difficulty would be: d= 12 * 1000= 12000