Final answer:
RAM and SSD are two types of memory that can be added to a desktop computer to boost its speed.
Step-by-step explanation:
The two types of memory that can be added to a desktop computer to boost its speed are RAM (Random Access Memory) and Solid State Drive (SSD).
RAM is a type of volatile memory that temporarily stores data that the computer is actively using. Adding more RAM allows the computer to handle larger amounts of data and run programs more smoothly.
An SSD, on the other hand, is a type of non-volatile memory that provides permanent storage for data even when the computer is turned off. Installing an SSD can significantly improve the boot-up time of the computer and decrease loading times for games and other applications.