How to configure the difficulty of miners？
If your miners are extremely high or low, configuring a suitable difficulty will improve the efficiency.
Difficulty parameters: d=4096 or d=4096,md=1024, Type these parameters into your password bar in the miner background system.
d=4096 means that the initial difficulty will be 4096 after its connection. md=1024 means that the miner's minimum difficulty is 1024. No matter how low the hashrate is, the pool will never assign a difficulty less than 1024.
In command line, it's:
cgminer -o stratum+tcp://cn.ss.btc.com:3333 -u USER_NAME -p d=4096 ...
cgminer -o stratum+tcp://cn.ss.btc.com:3333 -u USER_NAME -p d=4096,md=1024 ...
Recommended difficulty is calculated as: D=H*2.3, H is the hashrate, G is unit.
E.g: S9 is 14T then D = 14000 2.3 = 32200, set to d=32200
S7 is 5T then D = 5000 2.3 = 11500, set to d=11500
U3 is 50G then D = 50 * 2.3 = 115, set to d=115