Best SFX Form Factor Power Supplies for Small PCs
For compact builds, SFX power supplies offer high efficiency, modular cabling, and enough wattage to power modern GPUs without overwhelming the case. This guide highlights five standout SFX units that balance size, performance, and quiet operation, helping you choose a reliable solution for small-form-factor PCs.
style=”display:none;”>Summary of selected products:
| Product | Brand | Key Benefit | Form Factor |
|---|---|---|---|
| Lian Li SP V2 750W SP750G.B | Lian Li | ATX 3.1, PCIe Gen 5.0, low noise 92mm fan | SFX |
| Corsair SF850 (2025) | Corsair | 80 Plus Platinum, PCIe 5.0, fully modular | SFX |
| ASUS ROG Loki SFX-L 750W | ASUS | ROG heatsinks, 120mm PWM ARGB fan | SFX-L |
| Corsair SF750 (2025) | Corsair | 80 Plus Platinum, ATX 3.1, PCIe 5.1 | SFX |
| Lian Li SP V2 750W SP750G.W | Lian Li | ATX 3.1, PCIe 5.0, low-noise 92mm fan | SFX |
Lian Li SP V2 750W SP750G.B Review
Fully Modular PSU: The SP750G.B utilizes modular cabling to reduce clutter, connecting only what the system requires. ATX 3.1 certification aligns with PCIe Gen 5.0 readiness, helping handle transient power spikes typical of modern GPUs. A premium 92mm FDB fan delivers efficient cooling with reduced noise. The unit suits compact builds needing reliable, high-quality power with a low-profile footprint.
CORSAIR SF850 (2025) Review
80 Plus Platinum, fully modular SFX power with ATX 3.1 compliance and PCIe 5.0 readiness. The SF850 (2025) is designed for power-dense builds in small cases, offering robust cabling options and a compact footprint. It’s suitable for high-end SFF systems that need consistent voltage and minimal heat buildup in tight spaces, with a focus on tidy cable management.
ASUS ROG Loki SFX-L 750W Review
The Loki SFX-L 750W features ROG heatsinks around critical components to improve thermals and longevity. An axial-tech 120mm PWM fan helps control noise, with the compact SFX-L form factor targeting premium small builds. Compatible with ATX 3.0 and PCIe 5.0, it’s a strong choice for gamers seeking enhanced cooling performance and silent operation in a small footprint.
CORSAIR SF750 (2025) Review
SF750 (2025) delivers Platinum-level efficiency in a compact SFX package. It’s ATX 3.1 compliant with PCIe 5.1 readiness and includes SFX-to-ATX bracket support for flexible mounting. The fully modular design reduces cable clutter, making it easier to route cables in small cases while maintaining clean airflow and cooling.
Lian Li SP V2 750W SP750G.W Review
White variant of the SP V2 line, SP750G.W maintains ATX 3.1 compatibility and PCIe 5.0 readiness. It mirrors the black SP750G.B’s low-noise, 92mm FDB fan setup and fully modular cabling, making it ideal for white-themed builds or systems that benefit from a lighter aesthetic. The unit supports clean cable management and durable performance in compact cases.
Apevia SFX-AP500W Review
APEVIA SFX-AP500W targets mini ITX and micro ATX builds with a compact SFX form factor. It provides a modest 500W capacity, suitable for lighter SFF systems. The included connectors cover essential motherboard and PCIe needs, and the compact size makes it easy to integrate into tight enclosures while maintaining reliable power delivery.
Cooler Master V850 SFX Gold Review
The V850 SFX Gold is a robust ITX-oriented PSU with an 850W output and 80 Plus Gold efficiency. It features a 90-degree cable layout for easier routing and ATX 3.1 compatibility, supporting PCIe 5.1. It’s designed for high-performance SFF builds requiring both strong power and flexible cabling in tight spaces.
ARESGAME SFX Power Supply Review
ARESGAME SFX Power Supply offers 850W with ATX 3.0 and PCIE 5.0 readiness, 80 Plus Gold efficiency, and a fully modular design. It emphasizes durable Japanese capacitors and a compact SFX form factor, aiming to balance reliability with compactness for mini-ITX and other small builds. A durable hydraulic bearing fan supports quiet operation under load.
Buying Guide: Key Purchase Considerations
- Wattage and headroom: Choose wattage that matches your GPU and CPU: 500W–650W for mid-range builds, 750W–850W for high-end systems with PCIe 5.0 GPUs.
- Efficiency and certifications: Look for 80 Plus Platinum or Gold for better energy use and heat management in compact spaces.
- Form factor compatibility: SFX and SFX-L are ideal for tiny cases; ensure your enclosure supports the chosen form factor and mounting options.
- Modularity: Fully modular cables simplify cable management and airflow in tight interiors.
- ATX 3.x compatibility: ATX 3.0/3.1 readiness ensures better transient response with PCIe 5.0 GPUs and modern CPUs.
- Cooling and noise: Consider PSU fans with low-noise designs (FDB or PWM control) for quieter operation in small spaces.
- Warranty and build quality: A longer warranty (e.g., 10 years) is common among premium SFX units and signals durable components.
- Connector variety: Ensure enough PCIe, SATA, and motherboard power connectors for your chosen build and future upgrades.
When selecting an SFX power supply, balance physical dimensions, efficiency, and future upgrade plans. For compact gaming rigs or media centers, the five models reviewed here provide a spectrum of high-efficiency options, from Platinum-rated units to robust, feature-rich solutions designed to minimize heat and maximize space.