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Alimentations SFX

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Current price: 144,99 £GB
Current price: 179,99 £GB
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Current price: 154,99 £GB

Alimentations SFX

What Is an SFX Power Supply?

Building a small form factor PC doesn't mean compromising on power or reliability. CORSAIR SFX power supplies are engineered for compact builds where every millimeter counts, delivering the wattage and efficiency your system needs in a significantly smaller footprint than a standard ATX PSU.

SFX stands for Small Form Factor. An SFX PSU uses a standardized compact form factor designed to fit mini-ITX cases and other small form factor enclosures that cannot accommodate a full-size ATX unit. The SFX standard is smaller in every dimension compared to ATX, making it the go-to choice for builders prioritizing a tight, clean build without sacrificing performance.

SFX vs. SFX-L: Which Form Factor Do You Need?

If you're shopping for an SFF power supply, you'll encounter two related standards:

  • SFX: The core small form factor standard. Ideal for ultra-compact mini-ITX cases where space is at a maximum constraint.
  • SFX-L: A slightly longer variant of the SFX standard. The extended length accommodates a larger fan, which can help with quieter operation and thermal performance in cases that support it.

Always check your case specifications before purchasing to confirm which form factor fits your build.

Efficiency and Performance in a Compact Package

Power supply efficiency is rated under the 80 PLUS and Cybenetics certification programs, ranging from Bronze, Silver, Gold, Platinum, Titanium and Diamond. Higher efficiency translates to lower running temperatures and quieter fan behavior — a real advantage in compact cases where airflow is naturally limited. The result is a power supply that works hard without adding unnecessary heat or noise to your small form factor build.

What to Look for When Choosing an SFX PSU

When selecting an SFF power supply, consider these key factors:

  • Wattage: Match your PSU wattage to the combined power draw of your CPU and GPU, with headroom for peaks.
  • Efficiency rating: Higher 80 PLUS ratings reduce heat and energy waste.
  • Modular cabling: Fully modular designs let you connect only the cables you need, keeping cable management clean inside a tight case.
  • Form factor compatibility: Confirm whether your case requires SFX or SFX-L before choosing.

Built for Compact, High-Performance Builds

CORSAIR SFX power supplies are a strong choice for mini-ITX gaming rigs, home theater PCs, and compact workstations where space and performance both matter. Pair your PSU with the right small form factor case and browse our full range to find the right SFX PSU for your build.