CompTIA A+ Core 1 Exam 220-1101 - Lesson 2

These flashcards cover key concepts related to power supplies, storage devices, system memory, and CPUs from the CompTIA A+ Core 1 Exam preparation material.

Power Supply Unit (PSU)

A hardware component that converts alternating current (AC) to direct current (DC) to power a computer.

Wattage Rating

The measure of power a power supply can provide, assessed in watts, calculated as Voltage (V) multiplied by Current (I).

Redundant Array of Independent Disks (RAID)

A data storage virtualization technology that combines multiple physical disk drive components into a single logical unit for fault tolerance.

Solid-State Drive (SSD)

A mass storage device that uses flash memory to provide faster access speeds than traditional hard disk drives (HDDs).

Error Correcting Code (ECC) RAM

A type of memory that can detect and correct data corruption, enhancing system reliability.

Virtual Memory

A memory management capability that uses hardware and software to allow the system to use space on the hard drive as additional RAM.

CPU Pipeline

The series of stages through which instruction passes in a CPU, including fetch, decode, execute, and writeback.

Dual-channel

A memory access mode that allows two 64-bit paths to the memory controller, improving performance over single-channel.

CPU Socket Types

Connection points on the motherboard for CPUs, which can be of different types such as Land Grid Array (LGA) and Pin Grid Array (PGA).

Fault Tolerance

The ability of a system to continue functioning in the event of a hardware failure.