10 Best SFX Computer Power Supplies for Compact PCs in 2026

Choosing the right power supply is one of the most important decisions in a compact PC build. The best SFX computer power supplies balance wattage, efficiency, thermals, connector support, noise, and physical compatibility without wasting valuable case space.

This roundup compares 10 options ranging from compact 300W units to high-output 1000W models, including modern ATX 3.1 and PCIe 5.1-ready designs for current graphics cards.

Best 10 Sfx Computer Power Supplies Picks for 2026

High-Output SFX Pick – Cooler Master V850 SFX Gold

For demanding small-form-factor systems, the Cooler Master V850 SFX Gold is one of the more capable sfx computer power supplies. Its 850-watt output, fully modular design, ATX 3.1 support, and PCIe 5.1-ready 12V-2×6 cable suit gaming, creator, and professional builds.

Best For: High-performance Mini-ITX and SFF PCs using a power-hungry graphics card.

Pros:

• 850 watts in a compact SFX form factor.
• ATX 3.1 and PCIe 5.1-ready 12V-2×6 cable supports up to 600W to the GPU.
• Fully modular cabling and a 10-year manufacturer warranty.
• 80 PLUS Gold and Cybenetics Gold certification.

Cons:

• Included cables are tailored for compact systems and may require extensions in larger cases.
• Gold efficiency is below the Platinum rating offered by some alternatives.

The V850 is a strong choice when compact dimensions and substantial GPU headroom matter more than minimizing wattage or achieving a Platinum efficiency rating.

Efficiency-Focused SFX Pick – CORSAIR SF750 (2024)

The CORSAIR SF750 (2024) combines 750 watts with an 80 PLUS Platinum rating, making it a practical option among sfx computer power supplies for compact builds. Its fully modular Type-5 Micro-Fit cables, low-noise PWM fan, and ATX 3.1 compliance help balance performance, efficiency, and cable management.

Best For: Efficient, quiet SFF systems with high-end components but moderate overall power needs.

Pros:

• 80 PLUS Platinum efficiency in a compact SFX chassis.
• ATX 3.1 compliant and PCIe 5.1 ready for transient power spikes.
• Fully modular Type-5 Micro-Fit cabling saves space.
• 92mm PWM fan, Zero RPM mode, and 105°C-rated Japanese capacitors.

Cons:

• 750 watts provides less headroom than 850W alternatives.
• Its included SFX-to-ATX bracket is useful for larger cases but the unit remains SFX-sized.

Choose the SF750 when Platinum efficiency, quiet operation, and tidy cabling are priorities and your component list does not require the additional capacity of an 850W unit.

Balanced SFF Value – Cooler Master V750 SFX Gold

The Cooler Master V750 SFX Gold offers a balanced specification for compact builds that need modern graphics-card support without moving to a larger power supply. This 750-watt, fully modular unit is among the sfx computer power supplies designed for Mini-ITX and SFF systems, with ATX 3.1 cabling and a PCIe 5.1-ready connector.

Best For: Mainstream-to-high-performance Mini-ITX systems seeking compact, modern power delivery.

Pros:

• 750 watts in a compact SFX form factor.
• ATX 3.1 cables and a 12V-2×6 PCIe 5.1-ready connector.
• Fully modular design helps reduce cable clutter.
• 80 PLUS Gold and Cybenetics Gold certification with a 10-year warranty.

Cons:

• Lower output and efficiency rating than the listed Corsair SF850 and SF750 models.
• Short customized cables may need extensions in larger cases.

The V750 makes sense for builders who want current-generation GPU cabling and a long warranty while keeping the budget and capacity below an 850W model.

Platinum High-Capacity Pick – CORSAIR SF850 (2024)

For compact systems that need both capacity and efficiency, the CORSAIR SF850 (2024) is a compelling option among sfx computer power supplies. It delivers 850 watts, carries an 80 PLUS Platinum rating, and includes fully modular Type-5 Micro-Fit cabling plus ATX 3.0 and PCIe 5.0 support.

Best For: High-performance SFF PCs that need 850 watts and Platinum-rated efficiency.

Pros:

• 850 watts of Platinum-rated SFX power.
• ATX 3.0 compliant and PCIe 5.0 ready for transient power spikes.
• Fully modular Type-5 Micro-Fit connectors support tidy small-case builds.
• 92mm PWM fan, Zero RPM mode, and 105°C-rated Japanese capacitors.

Cons:

• Uses ATX 3.0 and PCIe 5.0 specifications rather than the newer ATX 3.1 and PCIe 5.1 listed on some alternatives.
• Its higher capacity may be unnecessary for lower-power compact systems.

The SF850 is the better fit when a compact build needs generous GPU headroom and Platinum efficiency, while buyers should compare its stated platform support with newer ATX 3.1 options.

Premium SFX-L Power – ASUS ROG Loki 750W Platinum

The ASUS ROG Loki is a high-efficiency option for builders comparing sfx computer power supplies for compact gaming PCs. Its 750W output, fully modular design, ATX 3.0 compatibility, and included 16-pin PCIe cable make it well suited to systems using modern graphics cards.

Best For: Performance-focused mini-ITX and small-form-factor gaming builds that need Platinum efficiency and modern GPU support.

Pros:

• 80 PLUS Platinum efficiency rated up to 92%.
• ATX 3.0 compatible with a 16-pin PCIe cable capable of up to 600W.
• 120mm PWM Axial-tech fan, ROG heatsinks, and Lambda A low-noise certification.
• Fully modular cabling and a 10-year core product warranty.

Cons:

• SFX-L form factor may require more space than a standard SFX unit.
• Its premium feature set may be more than a basic compact PC requires.

With strong efficiency, quiet-oriented cooling, and support for newer PCIe power connections, the ROG Loki is a compelling choice when a compact build needs substantial headroom and long-term features.

High-Wattage Compact Value – Vetroo 850W SFX Gold

The Vetroo 850W gives shoppers evaluating sfx computer power supplies a high-capacity option with current-generation connectivity. It combines an SFX form factor with ATX 3.1 and PCIe 5.1 support, while the included bracket allows installation in compatible ATX cases.

Best For: Small-form-factor gaming systems that need 850W of output and flexibility across SFX and ATX-compatible chassis.

Pros:

• 850W output provides substantial capacity for demanding PC builds.
• ATX 3.1 and PCIe 5.1 ready, with backward compatibility for PCIe 4.0 and 3.0.
• 80 Plus Gold certification balances efficiency and operating cost.
• Fully modular cables, a 90mm FDB fan, and an SFX-to-ATX bracket are included.

Cons:

• The 90mm fan is smaller than the 120mm fan used by some competing units.
• It may be excessive for lower-power office or entry-level systems.

The Vetroo stands out for combining high wattage, updated standards, and installation flexibility. It is a practical pick for builders who want plenty of capacity without leaving the SFX format.

Budget Compact Power – SilverStone ST30SF V2 300W

The SilverStone ST30SF V2 is a straightforward choice among sfx computer power supplies for modest compact systems. Its 300W continuous output, 80 Plus Bronze efficiency, and standard SFX compatibility make it appropriate for low-power PCs where simplicity matters more than high-end GPU capacity.

Best For: Entry-level mini-ITX, office, media, and other compact PCs with modest power requirements.

Pros:

• 300W continuous output is rated for 24/7 operation at 40°C.
• Standard SFX design also supports ATX installation with the included bracket.
• 80 Plus Bronze efficiency provides a practical balance of cost and performance.
• 92mm fan and a single +12V rail support simple, compact builds.

Cons:

• 300W capacity limits suitability for power-hungry graphics cards and upgrades.
• Bronze efficiency is below the Gold and Platinum ratings of the other options.
• Warranty coverage is three years, shorter than some competing models.

For a basic small-form-factor computer, the ST30SF V2 offers an uncomplicated and flexible installation. Its limited wattage is the main consideration, so confirm your system’s power needs before choosing it.

Premium Compact Power – Thermaltake Toughpower SFX 750W

For builders comparing sfx computer power supplies, the Thermaltake Toughpower SFX 750W combines a compact SFX format with 80 Plus Platinum efficiency and current ATX 3.1 support. Its included 300W 12V-2×6 connector and fully modular design make it a practical choice for a powerful small-form-factor PC.

Best For: High-performance compact gaming or workstation builds needing ATX 3.1 and PCIe Gen 5.1 readiness.

Pros:

• 80 Plus Platinum certification supports efficient operation.
• ATX 3.1 and PCIe Gen 5.1 compatible, with a 300W 12V-2×6 connector included.
• Fully modular low-profile cables help simplify installation.
• Includes a 7-year manufacturer warranty and a 90mm FDB fan.

Cons:

• 750W capacity may be limiting for the most power-hungry multi-GPU configurations.
• It is designed for SFX systems, so case compatibility should be checked carefully.

With strict voltage regulation, low ripple noise, and a 17ms-plus hold-up time, this Thermaltake model emphasizes stable delivery in a small enclosure. It is a strong fit when modern GPU connectivity and compact dimensions matter.

Maximum SFX Headroom – LIAN LI SP1000P 1000W

The LIAN LI SP1000P stands out among sfx computer power supplies with a 1000W output, 80 Plus Platinum efficiency, and support for ATX 3.1 and PCIe 5.1. Its included SFX-to-ATX bracket also gives builders more flexibility when moving between compact and standard cases.

Best For: High-powered gaming PCs and creator systems using demanding components in an SFX-compatible case.

Pros:

• 1000W capacity provides substantial power headroom.
• Fanless mode activates at 40% load or below for quieter operation.
• Includes a 12V-2×6 cable and an SFX-to-ATX mounting bracket.
• Uses 100% Japanese 105°C capacitors and carries a 10-year warranty.

Cons:

• Its higher capacity and 4.9-pound weight may be more than modest compact builds need.
• The listed input-voltage range is 120V, so regional compatibility should be verified.

Flexible DC cables can make routing easier, while Platinum certification helps support cooler and more efficient operation. Choose this model when maximum SFX power and long-term component support are higher priorities than minimizing cost or capacity.

Quiet Value Pick – Redragon PSU015 750W

The Redragon PSU015 is a compact, fully modular option for shoppers evaluating sfx computer power supplies. It pairs 750W output and 80 Plus Platinum certification with a Zero RPM fan mode, ATX-compatible panel, and flat white cables for easier cable management.

Best For: Quiet, compact gaming builds that need flexible installation and efficient 750W power.

Pros:

• 80 Plus Platinum certification supports efficient, lower-noise operation.
• Zero RPM mode keeps the fan off until temperatures reach 60°C.
• Fully modular flat cables help reduce clutter and improve airflow.
• Supports ATX 3.0 and PCIe 5.0 power excursions, with a five-year warranty.

Cons:

• A 12VHPWR cable is not included.
• 750W may not provide as much headroom as a 1000W SFX unit.
• The product details identify an SFX12V design, so case and mounting compatibility should be confirmed.

With Japanese capacitors, multiple protection features, and broad 100–240V input support, the PSU015 offers a feature-rich compact platform. Its strongest advantage is combining modular installation and semi-passive cooling at a practical 750W capacity.

How We Picked the Best Sfx Computer Power Supplies

We evaluated these power supplies based on the needs of small-form-factor builders: sustained wattage, efficiency certification, modular cabling, connector standards, cooling design, acoustics, and fit. We also considered the range of systems each unit can support, from efficient office PCs and home servers to gaming systems with demanding GPUs.

ATX 3.1 and PCIe 5.1 support received extra consideration because newer graphics cards can produce short-lived power spikes and may use a 12V-2×6 connection. Warranty coverage, manufacturer reputation, included cables, and value were also part of the overall comparison.

Quick Comparison

Best For	Recommended Output	What to Prioritize
Basic compact PCs	300–500W	Reliable protections, efficiency, and case compatibility
Mainstream gaming	650–750W	Modular cables, low noise, and modern GPU support
High-end gaming	850–1000W	Transient handling, PCIe 5.1, and adequate connectors
Quiet premium builds	750W or more	Platinum efficiency, semi-passive cooling, and quality fans

Key Buying Factors for Sfx Computer Power Supplies

Wattage and Headroom

Estimate the combined CPU and GPU demand, then leave room for transient spikes and future upgrades. A 750W unit is a practical target for many gaming builds, while high-end graphics cards may justify 850W or 1000W. Avoid choosing solely by the advertised number; sustained output and reputable protections matter just as much.

SFX Versus SFX-L Size

Standard SFX units are typically the easiest choice for very small cases. SFX-L models are slightly longer and may offer more internal room for larger fans or higher-capacity components, but they are not compatible with every SFX enclosure. Confirm the case’s maximum PSU length before buying.

Efficiency, Noise, and Cabling

80 Plus Gold or Platinum certification can reduce wasted energy and heat, especially in systems that run for long periods. Fully modular cabling helps avoid clutter, but check cable lengths and connector layouts because tight cases may need specific routing. A larger or semi-passive fan can also improve acoustics, provided airflow is not restricted.

Modern GPU Connectors

For a current graphics card, look for ATX 3.1 and PCIe 5.1 readiness, plus an appropriate 12V-2×6 cable where supplied. Using the correct native cable is preferable to relying on multiple adapters, particularly in a compact case where cable bends can be severe.

Who Should Buy Which Sfx Computer Power Supplies?

Choose a 300W model for a low-power office, media, or home-server build with modest integrated or entry-level graphics. A 750W Gold or Platinum supply is the best all-around match for many compact gaming PCs. Builders pairing a powerful CPU with a modern high-end GPU should consider an 850W or 1000W option and verify both case clearance and connector requirements.

If quiet operation is your priority, focus on efficient Platinum units with intelligent fan control and avoid operating a small supply near its maximum output. For budget-conscious builds, prioritize dependable protections, correct sizing, and sufficient continuous wattage over cosmetic features.