järjestelmäyksikkö

Järjestelmäyksikkö, often translated as system unit or computer case, is the main component of a desktop computer. It houses the essential hardware parts that allow the computer to function. Typically, it's a rectangular box, though designs can vary significantly.

Inside the system unit are key components like the motherboard, which connects all other hardware. The central processing unit (CPU), the computer's brain, is also located here. Random-access memory (RAM), which provides temporary storage for active programs, is another crucial part. Storage devices, such as hard disk drives (HDDs) or solid-state drives (SSDs), are housed within the system unit to permanently store data.

The power supply unit (PSU) provides electricity to all internal components. Additionally, expansion cards, like graphics cards (GPUs) for enhanced visual processing or network interface cards (NICs) for internet connectivity, can be installed within the system unit. The system unit also contains the cooling system, typically fans, to prevent overheating of the components.

On the exterior of the system unit, users will find various ports for connecting peripherals such as monitors, keyboards, mice, and external storage devices. These ports can include USB, HDMI, Ethernet, and audio jacks. The system unit is the protective enclosure that consolidates and powers the core computing hardware.