The main types of power supply units (PSUs) used in computer systems are:
ATX (Advanced Technology extended): ATX is the most common form factor for desktop computers. These power supplies provide the standard power connections required by most computer components, including the motherboard, CPU, and peripherals. ATX PSUs come in various wattage ratings to accommodate different power requirements.
SFX (Small Form Factor): SFX PSUs are designed for compact computer cases and are smaller than ATX PSUs. They provide the necessary power connections but in a smaller form factor to fit within space-constrained systems.
TFX (Thin Form Factor): TFX PSUs are even smaller than SFX PSUs and are often used in slim desktop or low-profile systems. They are designed to fit into cases with limited height or depth.
EPS (Extended Power Supply): EPS PSUs are specialized power supplies used primarily in server systems and workstations. They provide additional power connectors to support multiple processors, high-end graphics cards, and other demanding components.
Modular and Semi-Modular PSUs: Modular and semi-modular PSUs offer a flexible cabling system where you can detach or connect cables as needed. This allows for better cable management and reduces clutter in the computer case.
Redundant PSUs: Redundant PSUs are commonly used in servers and mission-critical systems. They consist of two or more power supply units working in parallel, ensuring that if one PSU fails, the other(s) can provide power without interruption.
These are the primary types of power supply units commonly encountered in computer systems. Each type serves specific needs and requirements based on the form factor, power output, and flexibility of cable management.