10 Best SFX Computer Power Supplies for Compact PCs in 2026

Choosing the right power supply for a compact PC means balancing wattage, efficiency, cable clearance, noise, and compatibility with your case. The best SFX computer power supplies deliver dependable power without overwhelming a small-form-factor build.

Our 2026 roundup covers compact 500W options, efficient 750W models, and high-capacity ATX 3.1 units designed for modern graphics cards. Use the guide below to match power output and features to your hardware.

Best 10 Sfx Computer Power Supplies Picks for 2026

High-Output SFF Pick – Cooler Master V850 SFX Gold

For demanding small-form-factor builds, the Cooler Master V850 SFX Gold is a powerful option among sfx computer power supplies. Its 850-watt output, fully modular design, and ATX 3.1-ready 12V-2×6 cable support modern GPUs while keeping the compact SFX format.

Best For: Mini-ITX and SFF gaming, creator, and professional systems that need substantial GPU power.

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 cables and a 10-year manufacturer warranty

Cons:

• Extended cables may be needed for larger cases
• Uses 80 PLUS Gold efficiency rather than Platinum

The V850 stands out when a compact build requires extra headroom. Its customized cables help reduce clutter, while the integrated cooling-focused design supports sustained operation.

Quiet Premium Choice – CORSAIR SF850 (2024)

The CORSAIR SF850 (2024) combines 850 watts with 80 PLUS Platinum efficiency, making it a strong premium choice among sfx computer power supplies. Its fully modular Type-5 Micro-Fit cabling is designed to save space in compact cases, and the 92mm PWM fan supports low-noise cooling.

Best For: Power-dense SFF systems where efficiency, tidy cabling, and quiet operation are priorities.

Pros:

• 80 PLUS Platinum-rated 850W SFX output
• ATX 3.0 compliant and PCIe 5.0 ready
• Low-noise 92mm PWM fan with Zero RPM mode
• Includes an SFX-to-ATX mounting bracket

Cons:

• Seven-year warranty is shorter than some competing options
• Uses the older ATX 3.0 and PCIe 5.0 standards rather than ATX 3.1 and PCIe 5.1

Choose the SF850 when premium efficiency and quieter behavior matter more than having the newest listed standard. The compact modular connectors are especially useful where cable space is limited.

Balanced Gold Option – Cooler Master V750 SFX Gold

The Cooler Master V750 SFX Gold offers a practical balance of capacity and compact design for sfx computer power supplies. With 750 watts, full modularity, and ATX 3.1 cabling, it suits many modern Mini-ITX builds without stepping up to the larger 850-watt models.

Best For: Mainstream to high-performance Mini-ITX systems with a 750W power requirement.

Pros:

• 750 watts in a compact SFX form factor
• ATX 3.1 and PCIe 5.1-ready 12V-2×6 cable provides up to 450W to a GPU
• Fully modular design with customized short cables
• Backed by a 10-year manufacturer warranty

Cons:

• Extended cables may be needed for larger cases
• 80 PLUS Gold efficiency is below Platinum-rated alternatives

The V750 is a sensible middle ground for compact builds that need modern GPU connectivity but do not require 850 watts. Its short modular cables can make cable management easier in tight enclosures.

Efficient 750W Favorite – CORSAIR SF750 (2024)

The CORSAIR SF750 (2024) is a compact, efficient option among sfx computer power supplies for systems that fit within a 750-watt power budget. It pairs 80 PLUS Platinum certification with ATX 3.1 and PCIe 5.1 readiness, fully modular Type-5 Micro-Fit connectors, and low-noise PWM cooling.

Best For: Efficient, quiet SFF gaming PCs using modern graphics hardware within a 750W power envelope.

Pros:

• 80 PLUS Platinum-rated 750W SFX power
• ATX 3.1 compliant and PCIe 5.1 ready
• 92mm PWM fan with Zero RPM mode for low-noise operation
• SFX-to-ATX bracket included

Cons:

• Seven-year warranty is shorter than the Cooler Master alternatives listed
• Less total capacity than the 850W models

The SF750 is a strong fit when efficiency and acoustic control are priorities. It provides current-generation connectivity in a lightweight, fully modular package, provided your components do not require more than 750 watts.

Premium Quiet Pick – ASUS ROG Loki 750W Platinum

The ASUS ROG Loki is a premium choice for compact builds that need high-efficiency power. This SFX-L unit combines 750W of Platinum-rated output with ATX 3.0 support, a 16-pin PCIe cable, and a low-noise cooling design, making it a strong contender among SFX computer power supplies.

Best For: High-performance small-form-factor gaming PCs where efficiency, modern GPU support, and quiet operation matter.

Pros:

• 80 PLUS Platinum certification delivers up to 92% efficiency.
• Includes a 16-pin PCIe cable capable of supplying up to 600W to compatible graphics cards.
• 120mm PWM fan, ROG heatsinks, and Lambda A noise certification support quiet operation.
• Backed by a 10-year core product warranty.

Cons:

• The SFX-L form factor may not fit cases designed strictly for standard SFX units.
• RGB lighting adds features that may not be important for every build.

With Platinum efficiency, modern graphics-card connectivity, and a long warranty, the Loki is well suited to premium compact systems. Verify your case supports SFX-L before buying.

Value Platinum Choice – Redragon PSU015 750W SFX

The Redragon PSU015 delivers 750W in a compact, fully modular SFX design with 80 PLUS Platinum certification. Its Zero RPM fan mode, Japanese capacitors, and ATX 3.0-ready platform give it a practical feature set for builders comparing SFX computer power supplies.

Best For: Compact gaming PCs needing efficient 750W power, flexible cabling, and broad case compatibility through the included ATX-compatible panel.

Pros:

• 80 PLUS Platinum certification supports efficient, cooler operation.
• Zero RPM fan mode keeps the fan off until temperatures reach 60°C.
• Fully modular flat white cables help reduce clutter and improve airflow.
• Uses 100% Japanese capacitors and includes multiple protection features.

Cons:

• The 12VHPWR cable is not included.
• Its listed dimensions are relatively large, so case clearance should be checked carefully.
• The five-year warranty is shorter than some competing models in this group.

This Redragon model offers an appealing blend of efficiency, modular installation, and semi-passive cooling. Buyers using a high-end GPU should budget for a suitable cable because the 12VHPWR lead is excluded.

Modern Gold Standard – Lian Li SP750 V2 750W SFX

The Lian Li SP750 V2 is a fully modular 750W SFX power supply designed around the ATX 3.1 standard. With a native 12V-2×6 connector, a 92mm fluid dynamic bearing fan, and a 10-year warranty, it is a well-rounded option among SFX computer power supplies.

Best For: Current-generation compact gaming systems using modern graphics cards and needing a quiet, fully modular SFX unit.

Pros:

• ATX 3.1 certification supports PCIe Gen 5 platforms and transient power spikes.
• Native 12V-2×6 connector supports compatible high-performance graphics cards.
• 92mm FDB fan is designed for quiet, efficient cooling.
• Includes 10-year hardware protection.

Cons:

• 80 PLUS Gold efficiency is below the Platinum rating of two alternatives here.
• The listed input-voltage range is 110–120V, so compatibility should be checked for your region.

The SP750 V2 focuses on current standards, straightforward modular installation, and quiet cooling in a standard SFX footprint. It is especially compelling when native 12V-2×6 support and a long warranty are priorities.

Best High-Wattage Pick – Thermaltake Toughpower SFX 1000W

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For compact systems that need substantial headroom, this Thermaltake is a powerful option among sfx computer power supplies. Its 1000W SFX design combines 80 Plus Platinum efficiency, full modularity, and modern PCIe 5.1/ATX 3.1 compatibility, while the included adapter bracket supports ATX cases.

Best For: High-performance compact gaming or workstation builds using current-generation graphics hardware.

Pros:

• 1000W SFX output in a compact form factor
• PCIe 5.1 and ATX 3.1 ready with a native 600W 12V-2×6 connector
• 80 Plus Platinum certified and fully modular
• Includes an SFX-to-ATX adapter bracket and a seven-year warranty

Cons:

• Higher capacity may be unnecessary for modest systems
• Its 90mm fan still adds an active cooling component

With strict voltage regulation, low ripple noise, and a 17ms-plus hold-up time, the Toughpower SFX 1000W is built for demanding compact PCs. It is especially compelling when modern GPU support and maximum power headroom matter.

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Best Budget Option – Apevia SFX-AP500W 500W

Apevia SFX-AP500W Mini ITX Solution/Micro ATX/SFX 500W Power Supply | SFX Form Factor, 80mm Auto Thermal Fan, 500W SFX Power Supply, Sleeved PSU Cables, Heavy Duty Protections

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The Apevia SFX-AP500W is a straightforward choice for smaller systems that do not need premium features. Among sfx computer power supplies, it focuses on basic 500W capacity, broad connector compatibility, and a compact enclosure for Mini ITX, Micro ATX, and SFX builds.

Best For: Entry-level or modest-power small-form-factor PCs using standard motherboard and graphics connectors.

Pros:

• Compact 500W SFX power supply for Mini ITX and Micro ATX systems
• Includes 20+4-pin, split 4+4 CPU, and split 6+2 PCIe connectors
• Provides three SATA and two Molex connectors
• 80mm auto-thermal fan and sleeved cables

Cons:

• Non-modular design can make cable management more difficult
• Rated for 115V input only according to the supplied specifications
• One-year warranty is shorter than the warranties on the other listed models

This Apevia is best evaluated as a practical, connector-flexible solution rather than a premium upgrade. Its 500W output suits uncomplicated compact builds, provided the system’s power requirements remain within that limit.

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Best Simple Pick – Lian Li SP1000P 1000W

LIAN LI SP1000P 1000W SFX Power Supply, 80 Plus Platinum, Black (SP1000P.B) | 12V-2x6 Cable, ATX 3.1 & PCIE 5.1 Compliant, Full Modular, 100% Japanese 105C Capacitors, 10-Year Warranty

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Lian Li’s SP1000P combines compact sizing with premium features that are useful in a powerful small-form-factor system. This 1000W option among sfx computer power supplies offers 80 Plus Platinum efficiency, fanless operation at up to 40% load, flexible cables, and current PCIe 5.1/ATX 3.1 support.

Best For: Gamers and creators who want high capacity, quiet low-load operation, and long-term component quality.

Pros:

• 1000W SFX capacity with 80 Plus Platinum efficiency
• Fanless mode activates at loads of 40% or less for quieter operation
• 100% Japanese 105°C-rated capacitors
• Fully modular, with flexible cables, a 12V-2×6 cable, and a ten-year warranty

Cons:

• Its 1000W capacity may exceed the needs of mainstream compact PCs
• The premium feature set may be unnecessary for budget builds

The SP1000P stands out when silence, efficient operation, and long-term support are priorities. Its included SFX-to-ATX bracket also makes it practical for builders who may move the power supply between compact and standard cases.

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How We Picked the Best Sfx Computer Power Supplies

We focused on models that fit compact PC builds and cover a useful range of capacities, from entry-level systems to demanding gaming workstations. Our comparison considers rated wattage, efficiency certification, modular cabling, modern ATX and PCIe standards, connector support, cooling design, and the practical needs of small cases.

Because SFX and SFX-L dimensions vary, physical compatibility matters as much as electrical capacity. Always check your case documentation before buying, particularly when choosing an SFX-L model or a power supply with a larger cable set.

Quick Comparison

Power range	Best suited to	What to prioritize
500W	Integrated graphics and entry-level GPUs	Case fit, protections, and value
750W–850W	Most compact gaming PCs	Efficiency, noise, modular cables, and GPU connectors
1000W	High-end GPUs and workstation builds	ATX 3.1 support, transient handling, and thermal headroom

Key Buying Factors for Sfx Computer Power Supplies

Wattage and Headroom

Estimate your system’s sustained power draw, then leave sensible headroom for transient spikes, future upgrades, and quieter operation. A 750W unit is often a strong middle ground for a modern gaming build, while 850W or 1000W makes more sense for flagship graphics cards and power-hungry processors.

SFX Versus SFX-L Fit

Standard SFX models are the safest choice for cases designed around compact power supplies. SFX-L units can offer larger fans or higher capacity, but they are longer and may interfere with drive cages, radiators, or cable routing. Confirm both mounting support and clearance.

ATX 3.1 and PCIe 5.1 Connectivity

For newer graphics cards, an ATX 3.1 power supply with a native 12V-2×6 connection can simplify installation and reduce adapter clutter. Check the included cable layout and connector rating rather than relying on wattage alone.

Efficiency, Acoustics, and Cables

Higher 80 Plus ratings can reduce wasted energy and heat, though they do not guarantee silence. Look for semi-passive or low-noise fan behavior, fully modular cables, and cable lengths that suit your case. In tight enclosures, flexible cables can be easier to manage than thick, rigid ones.

Who Should Buy Which Sfx Computer Power Supplies?

Choose a 500W model for a modest office, media, or entry-level gaming PC when your graphics card and processor have conservative power requirements. For most mainstream small-form-factor gaming systems, a 750W Gold or Platinum unit offers a practical balance of capacity, efficiency, and cost. Step up to 850W when using a higher-end GPU or when you want additional upgrade headroom.

Buy a 1000W model only when your components can use the capacity; otherwise, you may pay for headroom your system never needs. Builders prioritizing the newest graphics-card standards should favor ATX 3.1 and native PCIe 5.1 or 12V-2×6 support, while budget-focused buyers should first verify case compatibility, protections, and warranty coverage.