Solid-state drives in computers are becoming much more common and provide a substantial performance increase. Traditional hard drives consist of a series of spinning magnetic drive platters, whereas solid-state drives have no moving parts and consist entirely of non-volatile memory chips. While solid-state drives are still relatively expensive compared with traditional hard drives, some new computers are coming with options for a solid-state system drive (containing the operating system and applications) together with a larger traditional secondary hard drive for storing user data such as documents. This allows you to get the advantages of solid-state, such as very fast system startup and application launching, together with the benefits of being able to store your documents on a large capacity hard drive.