Important! You should set appropriate difficulty for your miner to increase efficiency and reduce the number of submitted shares that produces rejects. If you have fast miner that is capable of creating masses of rejects at short time, then set higher difficulty so the reject count is lower, otherwise your miner might get banned by our overload prevention system. One thing to remember is that difficulty doesn't affect earnings. Higher difficulties will result in lower bandwidth and less frequent shares submission. You can set the difficulty of your miner by setting d= within your password parameter to one of the following values: https://www.nicehash.com/index.jsp?p=faq#faqs7