The hardware or software needed to speed up your PC will depend on the type of computer you are using, its hardware specifications, and what you need it for. A general rule of thumb is that faster processors, more RAM, and bigger hard drives will generally improve system performance. Installing or upgrading to an SSD (Solid State Drive) can make a noticeable difference in speed. Additionally, installing a good antivirus program, optimizing your system settings, and clearing out temporary files and programs can also make a difference in performance.