To be successful in mining, you should first set your mining rig in a region where you can get cheap electricity and has a cool climate. Otherwise, your operational cost would increase. If you keep your mining rig properly ventilated and clean with a steady power supply and good internet connectivity you are good to go. The other major drawback you might face is freezing or hash rate dropping. During that, try to reboot the PC it would resolve that issue. Keep your mining rig cool and mine coins that are profitable like Ethereum, and Raven. Happy Mining.