Bitcoin mining does not require a lot of bandwidth! It should be noted that the higher the hashing rate of your machine, the higher the bandwidth it will need because it will allow you to access work units faster (download new ones and bring them back more often). It’s important but not that much. Your mining hardware uses the Internet to synchronize your progress with the pool and blockchain. This happens frequently, but if you have a small configuration with few units, then it hardly uses the Internet. In addition, keep in mind that it’s not the speed that counts, but the quality of the connection. Fluctuating speeds and Internet connectivity can result in lower profits because your miner will not be able to send your extracted actions to the pool or Blockchain itself. A bad internet connection often leads to invalid shares, so it should be noted as well.