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Click a numbered hotspot to explore the system unit.
Computer hardware, explained visually
Explore Computer Components in 3D
A computer is a system of connected parts. Explore the 3D model above to see where each component sits, then use these guides to learn what it does, how it works, and how it connects to the rest of a PC.
PC component guides
Each guide pairs a plain-language explanation with specifications, common issues, related parts, and an interactive 3D view.
- PC Case: The Complete System ChassisThe shell that houses, cools, and protects every internal component.
- CPU: Central Processing UnitThe brain of the computer — executes instructions and coordinates every task.
- Motherboard: The Main System BoardThe backbone that connects every component into one working computer.
- RAM: Random Access MemoryHigh-speed working memory that holds data the CPU is actively using.
- GPU: Graphics Processing UnitThe parallel powerhouse that renders visuals and accelerates AI workloads.
- SSD: 2.5" SATA Solid State DriveSilent, lightning-fast storage with no moving parts, over a SATA link.
- M.2 SSD: NVMe Solid State DriveA gumstick-sized NVMe drive that mounts directly onto the motherboard.
- HDD: Hard Disk DriveHigh-capacity magnetic storage built from spinning platters.
- PSU: Power Supply UnitConverts wall power into clean, regulated DC for every component.
- CPU Cooler: Thermal Management for the CPUKeeps the processor in its safe operating window under any load.
- Case Fans: Airflow ManagementPull cool air in and push hot air out to regulate case temperature.
- Keyboard: Primary Input DeviceThe main way you type, command, and control your computer.
- Mouse: Pointing & Cursor ControlThe precision tool that moves your cursor and drives interactions.
- Monitor: Visual Output DisplayThe display that turns rendered frames into the images you see.
- UPS: Uninterruptible Power SupplyBattery backup that keeps your PC alive through outages and power dips.
- AVR: Automatic Voltage RegulatorSmooths unstable mains voltage to protect your PC from dips and spikes.
See how the parts fit together
Component compatibility matters when building a computer. The CPU must match the motherboard socket, memory must match the board, and the case and power supply must support the parts you choose.
Follow the desktop PC assembly guide