What Is a Small Form Factor PC?
A small form factor (SFF) PC is a complete computer built into a chassis substantially smaller than a traditional tower desktop. There is no single formal standard, but in practice SFF covers machines from roughly 0.5 litres up to about 4 litres in volume, typically measuring 100–200 mm on their longest side. The category includes mini PCs, thin clients, industrial box PCs and all-in-one units where the computer is integrated behind the display. What they share is reduced footprint, lower power draw, and mounting flexibility — VESA brackets, DIN rails or panel cut-outs — rather than raw expandability.
Key Specifications to Consider
Because space is limited, SFF designs trade expansion slots for integration. Most use soldered or SO-DIMM memory, M.2 storage instead of 2.5" or 3.5" bays, and external 12V or 19V power adapters rather than internal ATX supplies.
| Attribute | Typical SFF Range | Notes |
|---|---|---|
| Processor | Intel N100 / N150 / J4125, Core i3-1215U | 4–10 cores, 6W–15W TDP classes |
| Memory | 4 GB – 32 GB DDR4/DDR5 | Often 1–2 SO-DIMM slots |
| Storage | 128 GB – 1 TB M.2 SSD | Some models add a 2.5" bay |
| Cooling | Fanless or single low-RPM fan | Fanless suits dusty environments |
| Power | 12V–19V DC adapter, 30–60W | Low idle draw, PoE variants exist |
| Display outputs | 1–2× HDMI, DisplayPort, VGA | Dual independent displays common |
| Networking | Gigabit Ethernet, optional Wi-Fi | Dual |
