10 Best SFX Computer Power Supplies for Small-Form-Factor PCs in 2026

Choosing a power supply for a small-form-factor PC involves more than checking the wattage. The unit must fit your case, provide the right connectors for your graphics card, and deliver dependable power without adding excessive heat or fan noise.

These 10 SFX and SFX-L options cover compact mainstream builds, high-end gaming systems, and power-hungry workstations. Use the buying guide below to match capacity, efficiency, compatibility, and features to your build.

Best 10 Sfx Computer Power Supplies Picks for 2026

High-Wattage SFX Pick – Cooler Master V850 SFX Gold

For demanding mini-ITX and small-form-factor builds, the Cooler Master V850 SFX Gold delivers 850 watts in a compact, fully modular design. Its ATX 3.1 support, 12V-2×6 cable, and 80 PLUS Gold certification make it a capable choice among SFX computer power supplies for modern GPUs.

Best For: High-performance SFF gaming, creator, and professional PCs that need substantial power.

Pros:

• 850W output in a compact SFX form factor
• ATX 3.1 and PCIe 5.1-ready 12V-2×6 cable supports up to 600W to a GPU
• Fully modular cables and a 10-year manufacturer warranty
• Integrated design supports cooling and power delivery performance

Cons:

• Customized short cables may require extensions in larger cases
• 80 PLUS Gold efficiency is below Platinum-rated alternatives

The V850 is a strong fit when power headroom matters more than minimizing wattage. Confirm your case clearances and cable lengths before buying, especially for larger-than-SFF enclosures.

Quiet Platinum Choice – CORSAIR SF850 (2024)

The 2024 CORSAIR SF850 combines 850 watts with 80 PLUS Platinum efficiency in a compact SFX chassis. For buyers comparing SFX computer power supplies, its fully modular Type-5 Micro-Fit cabling, 92mm PWM fan, and zero-RPM mode emphasize tidy installation and low-noise operation.

Best For: Dense SFF systems where high output, efficiency, and quieter cooling are priorities.

Pros:

• 850W 80 PLUS Platinum-rated SFX power
• ATX 3.0 compliant and PCIe 5.0 ready for transient power demands
• 92mm PWM fan with fluid dynamic bearing and zero-RPM mode
• Fully modular Type-5 Micro-Fit connectors and SFX-to-ATX bracket included

Cons:

• Uses the older ATX 3.0 and PCIe 5.0 standards rather than the newer versions listed on some competing models
• Seven-year warranty is shorter than the 10-year warranty supplied with the Cooler Master options

The SF850 is a practical premium option for compact systems that can benefit from Platinum efficiency and low-noise features. Its included bracket also gives it flexibility in compatible ATX installations.

Balanced SFF Value – Cooler Master V750 SFX Gold

The Cooler Master V750 SFX Gold provides 750 watts for compact gaming and workstation builds without stepping up to an 850W unit. Its fully modular layout, ATX 3.1 support, and 12V-2×6 connector make it a well-rounded option among SFX computer power supplies.

Best For: Mini-ITX and SFF PCs with strong but not exceptionally high power requirements.

Pros:

• 750W output in a compact SFX form factor
• ATX 3.1 and PCIe 5.1-ready design with up to 450W GPU delivery
• Fully modular cables help reduce clutter
• 10-year manufacturer warranty and 80 PLUS Gold certification

Cons:

• Lower capacity than the 850W models in this roundup
• Short customized cables may need extensions in larger cases

The V750 makes sense when 750 watts covers your component plan and you want current-generation GPU connectivity. Check projected system power and case cable routing before installation.

Efficient 750W Favorite – CORSAIR SF750 (2024)

The 2024 CORSAIR SF750 offers 750 watts of 80 PLUS Platinum-rated power in a lightweight SFX package. It stands out among SFX computer power supplies with ATX 3.1 compliance, PCIe 5.1 readiness, fully modular Type-5 Micro-Fit connectors, and quiet fan features.

Best For: Efficient, quiet SFF builds that need modern GPU support without an 850W capacity.

Pros:

• 750W 80 PLUS Platinum-rated SFX power
• ATX 3.1 compliant and PCIe 5.1 ready for transient power spikes
• 92mm PWM cooling fan with zero-RPM mode
• Fully modular cabling and included SFX-to-ATX bracket

Cons:

• 750W capacity provides less headroom than the 850W alternatives
• Seven-year warranty is shorter than the Cooler Master models’ 10-year warranty

The SF750 is a compelling middle ground for builders who value efficiency and quiet operation while staying within a 750W power budget. Verify that your CPU and GPU combination fits that capacity before purchase.

Premium Quiet Performance – ASUS ROG Loki SFX-L 750W Platinum

For builders comparing SFX computer power supplies, the ASUS ROG Loki combines 750W of output with 80 PLUS Platinum efficiency, ATX 3.0 compatibility, and a fully modular design. Its 120mm PWM fan and reported Lambda A noise certification make it a strong fit for compact performance systems.

Best For: High-end small-form-factor gaming PCs using modern PCIe Gen 5 graphics cards.

Pros:

• 80 PLUS Platinum efficiency of up to 92%.
• ATX 3.0 support with a bundled 16-pin PCIe cable rated for up to 600W.
• 120mm PWM fan, ROG heatsinks, and Lambda A certification below 25 dB.
• Fully modular cabling and a 10-year core product warranty.

Cons:

• SFX-L form factor may require more clearance than a standard SFX unit.
• Its premium feature set may be more than a basic compact build needs.

The Loki is a compelling choice when efficiency, quiet operation, and next-generation GPU support matter. Confirm that your case accommodates the SFX-L format before buying.

Efficient Modular Value – Redragon PSU015 750W SFX Platinum

The Redragon PSU015 is an SFX computer power supply aimed at builders who want 750W, Platinum efficiency, and flexible cable management in a compact chassis. Its Zero RPM fan mode keeps the fan stopped until temperatures reach 60°C, while the ATX-compatible panel broadens case compatibility.

Best For: Compact gaming or workstation builds seeking efficient, quiet operation and modular cabling.

Pros:

• 80 Plus Platinum certification for improved efficiency and lower heat.
• Zero RPM fan mode supports quiet operation at lower temperatures.
• Fully modular flat white cables help reduce clutter and improve airflow.
• ATX 3.0 and PCIe 5.0 ready, with multiple protection circuits.

Cons:

• The package does not include a 12VHPWR cable.
• The supplied notes identify a five-year warranty, shorter than some alternatives.

This Redragon model offers a practical mix of efficiency, modularity, and compact compatibility. If your graphics card needs a 12VHPWR connection, plan for the missing cable before completing the build.

Modern GPU-Ready Choice – LIAN LI SP750 V2 750W Gold

Among SFX computer power supplies, the LIAN LI SP750 V2 stands out for its ATX 3.1 compliance, native 12V-2×6 connector, and fully modular cabling. A 92mm fluid dynamic bearing fan provides the cooling, while the unit is designed around the official 63.5mm-or-less SFX size specification.

Best For: Modern small-form-factor systems with high-performance 50- or 40-series graphics cards.

Pros:

• ATX 3.1 certified for PCIe Gen 5.0 platforms and transient power spikes.
• Native 12V-2×6 cable includes visual connection cues.
• Fully modular design simplifies cable management.
• 92mm FDB fan supports quiet thermal performance, backed by a 10-year warranty.

Cons:

• 80 Plus Gold efficiency is below the Platinum rating of some competing units.
• The listed input-voltage range is 110–120V, so compatibility should be checked for your region.

The SP750 V2 is a well-targeted option for compact PCs built around current-generation graphics hardware. Its native 12V-2×6 connection and ATX 3.1 support reduce adapter concerns, while the Gold rating keeps the unit practical for everyday use.

High-Output Compact Power – Thermaltake Toughpower SFX 1000W

For demanding small-form-factor builds, this Thermaltake unit is a high-output choice among sfx computer power supplies. Its 1000W SFX design combines 80 Plus Platinum efficiency, full modular cabling, and current-generation PCIe and ATX standards in a compact chassis.

Best For: High-performance SFX or ATX-compatible gaming and workstation builds that need substantial power capacity.

Pros:

• 1000W SFX output with an included SFX-to-ATX adapter bracket
• 80 Plus Platinum certification and fully modular low-profile cables
• Native 12V-2×6 connector with PCIe 5.1 and ATX 3.1 compatibility
• 7-year manufacturer warranty, low ripple, and tight voltage regulation

Cons:

• Higher capacity may be unnecessary for modest systems
• Compact SFX sizing requires careful cable and case planning

This is a strong fit when compact dimensions do not need to limit performance. The modern connector support and included adapter also make it more flexible than a basic SFX-only supply.

Budget Small-Form-Factor Option – Apevia SFX-AP500W 500W PSU

The Apevia SFX-AP500W is a straightforward 500W option for compact systems. Among sfx computer power supplies, it emphasizes broad connector compatibility and a space-saving enclosure for Mini ITX, Micro ATX, and SFX builds.

Best For: Entry-level or moderately equipped small-form-factor PCs using conventional power connectors.

Pros:

• 500W output in a compact 125mm x 100mm x 63.5mm enclosure
• Supports Mini ITX, Micro ATX, and SFX form-factor systems
• Includes 20+4-pin, 4+4-pin CPU, 6+2-pin PCIe, SATA, and Molex connections
• Split connectors accommodate different motherboard and graphics-card requirements

Cons:

• Non-modular cabling can make compact builds harder to organize
• Limited to 115V input according to the supplied specifications
• One-year warranty is shorter than the warranties on the other listed models

This model makes sense for a basic compact PC where 500W is sufficient and flexible legacy-style connectors are useful. Plan cable routing carefully because the cables are not modular.

Quiet Premium SFX Power – Lian Li SP1000P 1000W SFX PSU

The Lian Li SP1000P targets builders who want high capacity without giving up quiet operation. It stands out among sfx computer power supplies with a fanless mode up to 40% load, flexible modular cables, Japanese capacitors, and support for current ATX and PCIe standards.

Best For: Premium gaming and creator systems where quiet operation, efficiency, and long-term durability matter.

Pros:

• 1000W SFX capacity with an included SFX-to-ATX bracket
• Fanless operation at loads of 40% or less for quieter use
• 80 Plus Platinum efficiency and 100% Japanese 105°C-rated capacitors
• Full modular design, flexible cables, and 12V-2×6 support

Cons:

• 1000W capacity may exceed the needs of lower-power systems
• Premium features may be unnecessary for budget-focused builds
• Supplied input specifications list a 120V range

With its semi-passive cooling behavior, flexible cables, and 10-year warranty, the SP1000P is geared toward a refined compact build. It is especially appealing when silence and tidy routing are priorities.

How We Picked These Sfx Computer Power Supplies

We focused on models that suit compact PC builds while covering a broad range of capacities, efficiency ratings, form factors, and price points. The selection includes standard SFX units and larger SFX-L designs, along with fully modular options that simplify cable management in confined cases.

We also considered modern GPU support, including PCIe 5.1 and ATX 3.1 compatibility where specified, connector availability, low-noise features, component quality claims, and practical capacity for current gaming and workstation hardware. Always confirm the manufacturer’s specifications and your case’s clearance before buying.

Quick Comparison

Build Type	Recommended Capacity	What to Prioritize
Basic mini-ITX or office PC	450–600W	Case fit, reliability, and efficient operation
Mainstream gaming PC	650–750W	Modular cables, GPU connectors, and low noise
High-end gaming PC	850–1000W	ATX 3.1, PCIe 5.1, transient-load handling, and cooling
Compact workstation	750–1000W	Sustained-load performance, connectors, and warranty coverage

Key Buying Factors for Sfx Computer Power Supplies

Size and Case Compatibility

Standard SFX power supplies are more compact than ATX models, while SFX-L units are longer and may offer additional cooling capacity or component space. Check your case’s supported format, maximum PSU length, cable-routing clearance, and whether an adapter bracket is required.

Wattage and Power Headroom

Choose capacity based on the graphics card, processor, storage, fans, and future upgrades—not just the system’s estimated average draw. A reasonable reserve helps accommodate startup demands and transient spikes. Avoid choosing a 1000W unit solely because it has a higher number if your case and components do not need it.

Connectors and New Standards

Modern high-end graphics cards may require a native 12V-2×6 or compatible PCIe high-power connection. ATX 3.1 and PCIe 5.1 support can improve compatibility with newer hardware, but verify the exact cable included with the specific model.

Efficiency, Noise, and Modularity

Higher efficiency can reduce wasted energy and heat, which matters in small enclosures. Fully modular cabling lets you install only the leads you need and can improve airflow. Fan-stop or smart fan modes may reduce noise at low loads, but acoustic performance also depends on ventilation and ambient temperature.

Who Should Buy Which Sfx Computer Power Supplies?

Choose a 500W-class model for a modest integrated-graphics or entry-level discrete-GPU build. A 650W–750W SFX supply is the practical sweet spot for many compact gaming systems. Buyers pairing a small case with a powerful modern GPU should look at 850W–1000W units with current high-power connectors and suitable transient-load support. If quiet operation and premium efficiency are priorities, compare Platinum-rated models, but make sure the added cost and physical size fit your priorities.