When it comes to using REAPER, the amount of RAM you need will depend on the size and complexity of your projects. Also, consider how many virtual instruments and plugins you're using. A general rule of thumb is to have at least 8 GB of RAM for primary audio production and editing and 16 GB or more for more complex projects with multiple tracks and virtual instruments. However, remember that having more RAM can make Reaper run more smoothly and help prevent performance issues like audio dropouts or crashes.