käyttömuisti

Käyttömuisti, commonly known as RAM (Random Access Memory), is a type of computer memory that can be read from and written to in any order, hence the name random access. It is a volatile memory, meaning that its contents are lost when the power is turned off. Käyttömuisti is used as a working memory for a computer's central processing unit (CPU) to store program instructions and data that are currently being used.

The speed and capacity of käyttömuisti significantly impact a computer's performance. When a program is launched, its instructions and data are loaded from slower storage devices, such as hard drives or solid-state drives, into the käyttömuisti. The CPU can then access this information much faster, allowing for smoother and quicker execution of tasks. More käyttömuisti allows a computer to run more applications simultaneously and handle larger, more complex datasets without slowing down.

Types of käyttömuisti have evolved over time, with DDR (Double Data Rate) SDRAM (Synchronous Dynamic Random-Access Memory) being the most prevalent in modern computers. Different generations of DDR (e.g., DDR3, DDR4, DDR5) offer varying speeds and power efficiencies. The amount of käyttömuisti is typically measured in gigabytes (GB).