10 Best SFX Computer Power Supplies for Compact, High-Performance PCs in 2026

Choosing a power supply for a small-form-factor PC means balancing wattage, compatibility, noise, efficiency, and physical clearance. The right SFX unit can support a powerful gaming or workstation build without overwhelming a compact case.

We compared 10 SFX and SFX-L computer power supplies across output capacity, modular cabling, efficiency ratings, modern GPU support, and practical build requirements. Use the guide below to narrow the list based on your hardware and upgrade plans.

Best 10 Sfx Computer Power Supplies Picks for 2026

Best High-Wattage SFX – Cooler Master V850 Gold

For builders comparing sfx computer power supplies, the Cooler Master V850 SFX Gold combines an 850W output with a compact SFX form factor. Its fully modular design, ATX 3.1 support, and 12V-2×6 connector make it a practical fit for powerful mini-ITX and small-form-factor systems.

Best For: Gamers, creators, and professionals building high-performance ITX or SFF PCs.

Pros:

• 850W capacity in a compact SFX design
• ATX 3.1 and PCIe 5.1-ready 12V-2×6 cable supports up to 600W to a GPU
• Fully modular cables help reduce clutter
• 10-year manufacturer warranty

Cons:

• Included cables may be short for larger cases
• Uses air cooling with a single fan

The V850 is a strong choice when a small case needs substantial power and modern GPU connectivity. Confirm cable reach and case compatibility before buying.

Best Quiet Platinum SFX – CORSAIR SF850

The CORSAIR SF850 is one of the more efficiency-focused sfx computer power supplies, pairing 850W of output with an 80 PLUS Platinum rating. Its fully modular Type-5 Micro-Fit cables, zero-RPM mode, and 92mm PWM fan are designed for compact builds where space and noise matter.

Best For: Power-dense small-form-factor PCs and builders prioritizing efficiency and low noise.

Pros:

• 80 PLUS Platinum-rated 850W SFX power
• ATX 3.0 compliant and PCIe 5.0 ready
• Zero-RPM mode and fluid dynamic bearing fan support quieter operation
• 105°C-rated Japanese capacitors

Cons:

• Seven-year warranty is shorter than some alternatives in this group
• Specifications list a 12V minimum input, so verify regional compatibility

Choose the SF850 when compact dimensions, cable flexibility, and efficient low-noise operation are more important than maximum wattage. An SFX-to-ATX bracket is included for broader case compatibility.

Best Low-Noise SFX-L – ASUS ROG Loki 750W

The ASUS ROG Loki SFX-L 750W stands out among sfx computer power supplies for its Platinum efficiency, 120mm PWM fan, and Lambda A noise certification. The SFX-L chassis is slightly larger than standard SFX, so check your enclosure’s clearance before installation.

Best For: Premium desktop and personal-computer builds where low noise, efficiency, and modern GPU support are priorities.

Pros:

• 80 PLUS Platinum efficiency rated up to 92%
• 120mm Axial-tech PWM fan supports controlled cooling
• ATX 3.0 compatible with a 16-pin PCIe cable supporting up to 600W
• 10-year core product warranty

Cons:

• SFX-L form factor requires more space than standard SFX
• 750W output is lower than the 850W alternatives here
• RGB fan features may be unnecessary in a closed case

The Loki is a premium option for compact systems that need quiet operation and a modern power-delivery platform. Its SFX-L dimensions and four-pound weight make case fit especially important.

Best Value ATX 3.1 SFX – Vetroo 850W SFX

The Vetroo 850W gives builders a straightforward option among sfx computer power supplies, with an 850W capacity, 80 Plus Gold certification, and support for current ATX 3.1 and PCIe 5.1 standards. Its SFX-to-ATX bracket also allows installation in compatible larger cases.

Best For: Budget-conscious builders who want high output and current GPU connectivity in a flexible SFX package.

Pros:

• 850W output with 80 Plus Gold certification
• ATX 3.1 and PCIe 5.1 support with backward compatibility for PCIe 4.0 and 3.0
• Fully modular cabling simplifies cable management
• 90mm FDB fan and 10-year warranty

Cons:

• Gold efficiency is below the Platinum-rated models in this roundup
• Product notes do not specify a detailed connector count
• Confirm the SFX dimensions and included bracket suit your case

Vetroo’s 850W model is appealing when you want modern standards and broad mounting flexibility without moving to a larger PSU. Verify the available cables and case clearances for your planned hardware.

Maximum SFX Power – Thermaltake Toughpower SFX 1000W

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For demanding small-form-factor systems, this is one of the more powerful sfx computer power supplies available. Thermaltake combines a compact SFX design with 1000W output, 80 Plus Platinum efficiency, ATX 3.1 compatibility, and a native 12V-2×6 connector. An included SFX-to-ATX bracket also supports standard ATX case installations.

Best For: High-performance SFF or ATX builds needing substantial GPU power in a compact, fully modular PSU.

Pros:

• 1000W SFX output with 80 Plus Platinum certification.
• ATX 3.1 and PCIe Gen 5.1 ready with a native 600W 12V-2×6 connector.
• Fully modular low-profile cables and an SFX-to-ATX adapter bracket are included.
• Specified voltage regulation of ±2% and a 7-year manufacturer warranty.

Cons:

• Its 1000W capacity may be unnecessary for modest SFF systems.
• The compact SFX design still requires careful cable routing in tight cases.

This Thermaltake model is a strong choice when compact dimensions and high power matter equally. Its modern GPU connector and included adapter add flexibility, while the Platinum rating and modular cabling suit premium builds.

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Balanced ITX Value – Cooler Master V750 SFX Gold

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The Cooler Master V750 SFX Gold is a practical middle-ground option among sfx computer power supplies. Its 750W output fits many gaming and mini-ITX systems, while the fully modular design, ATX 3.1 cabling, and PCIe 5.1-ready 12V-2×6 connector help support newer graphics cards without taking up ATX-sized case space.

Best For: Mini-ITX and SFF gaming PCs that need modern GPU support without stepping up to a 1000W unit.

Pros:

• Compact SFX form factor with 750W output and 80 Plus Gold certification.
• PCIe 5.1-ready 12V-2×6 connector can deliver up to 450W to a GPU.
• Fully modular design and customized short cables help reduce clutter.
• Includes a 10-year manufacturer warranty.

Cons:

• Short cables may require extensions in larger cases.
• Gold efficiency is below the Platinum rating offered by some competing models.

Choose this Cooler Master when 750W is enough for your components and clean routing is a priority. The short-cable layout is especially well matched to compact builds, though larger cases may need additional cable length.

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Quiet Premium Build – LIAN LI SP1000P 1000W SFX

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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The LIAN LI SP1000P focuses on quiet operation and flexible installation, making it a compelling option among sfx computer power supplies. This fully modular 1000W SFX unit uses fanless operation at loads of 40% or less, includes flexible cables and an SFX-to-ATX bracket, and supports ATX 3.1 and PCIe 5.1 systems.

Best For: Gamers and creators building quiet, high-performance systems in either SFX or standard ATX cases.

Pros:

• 1000W SFX output with 80 Plus Platinum efficiency.
• Fanless mode activates at loads of 40% or less for quieter operation.
• Flexible cables simplify routing, and the included bracket supports ATX cases.
• Uses 105°C-rated Japanese capacitors and includes a 10-year warranty.

Cons:

• At 4.9 pounds, it is heavier than the other listed units.
• Its stated input range is 120V AC, which may limit suitability in some regions.

The SP1000P is a particularly appealing pick for users who want high capacity without constant fan noise. Its Platinum efficiency, flexible cabling, and dual SFX/ATX installation support make it versatile for premium builds.

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Compact Value Pick – Apevia SFX-AP500W 500W

For builders comparing sfx computer power supplies for Mini-ITX or Micro ATX systems, the Apevia SFX-AP500W offers 500 watts in a compact, non-modular design. Its split motherboard, CPU, and PCIe connectors support a range of common component configurations.

Best For: Budget-conscious small-form-factor builds using compatible mainstream components.

Pros:

• Compact SFX dimensions with an 80mm auto-thermal fan
• 500W output for Mini-ITX and Micro ATX systems
• Includes SATA, Molex, CPU, and PCIe connectivity
• Split connectors support 20-pin, 4-pin CPU, and 6-pin GPU requirements

Cons:

• Non-modular cables can make compact-case cable management more difficult
• Limited to 115V input according to the supplied specifications
• Requires all necessary PC cables to be connected before powering on

The Apevia is a straightforward choice when the priority is affordable SFX capacity and broad basic connector support. Confirm your case fit, voltage requirements, and graphics-card power needs before buying.

Quiet Modular Upgrade – Redragon PSU015 750W Platinum

The Redragon PSU015 stands out among sfx computer power supplies with 750 watts, 80 Plus Platinum certification, and a fully modular cable set. Its zero-RPM fan mode and ATX-compatible panel make it suited to compact builds where noise and cable organization matter.

Best For: High-performance small-form-factor PCs needing modular cabling, quiet operation, and broad input compatibility.

Pros:

• 80 Plus Platinum efficiency and 100% Japanese capacitors
• Zero-RPM fan mode until the unit reaches 60°C
• Fully modular flat white cables help reduce clutter
• Supports 100–240V input and includes ATX 3.0 and PCIe 5.0 readiness

Cons:

• 12VHPWR cable is not included
• 750W capacity and premium features may be unnecessary for modest systems
• Its listed dimensions are larger than a typical compact SFX specification, so case clearance should be verified

With strong efficiency, modular installation, and a smart fan mode, the PSU015 is a feature-rich option for demanding compact systems. Check the included cable requirements carefully, especially if your graphics card needs a 12VHPWR connection.

Next-Gen SFX Choice – Thermaltake Toughpower 750W

For modern graphics cards and compact workstations, the Thermaltake Toughpower SFX 750W is one of the more forward-looking sfx computer power supplies. It combines 80 Plus Platinum certification with ATX 3.1 compliance, PCIe Gen 5.1 readiness, and a supplied 300W 12V-2×6 connector.

Best For: Enthusiast small-form-factor builds using current-generation GPUs and fully modular cable management.

Pros:

• 750W SFX output with 80 Plus Platinum certification
• ATX 3.1 and PCIe Gen 5.1 compatible
• Includes a 300W 12V-2×6 connector
• Fully modular low-profile cables and a 90mm fluid dynamic bearing fan

Cons:

• Higher-end specifications may exceed the needs of basic compact systems
• Power-supply fit and cable routing should be checked in especially tight cases
• No modular cabling convenience if your build does not benefit from it

The Toughpower SFX 750W is a strong match for builders planning around newer GPU power standards and long-term platform compatibility. Its seven-year warranty and stated voltage, ripple, and hold-up-time targets add appeal for an enthusiast-focused build.

How We Picked the Best Sfx Computer Power Supplies

We focused on models suited to compact ITX and small-form-factor systems, comparing rated output, form factor, efficiency certification, modular cable design, cooling features, and current connectivity standards. ATX 3.1 support and PCIe 5.1 or 12V-2×6 connections received extra weight because they can simplify installation with newer graphics cards.

We also considered the range of systems each unit can serve. A 500W supply may be appropriate for a basic mini PC or modest gaming build, while 750W to 850W models offer more flexibility for modern CPUs and discrete GPUs. The 1,000W options are intended for especially demanding compact workstations and gaming systems.

Quick Comparison

• 500W: Best for efficient entry-level systems, integrated graphics, and modest dedicated GPUs.
• 750W: A balanced choice for many high-performance ITX gaming builds.
• 850W: Better suited to power-hungry CPUs, flagship GPUs, and future upgrades.
• 1,000W: Designed for demanding GPUs, workstation workloads, and maximum headroom.
• SFX-L: May provide additional capacity or quieter cooling, but verify case clearance before buying.

Key Buying Factors for Sfx Computer Power Supplies

Wattage and Upgrade Headroom

Estimate the sustained requirements of the CPU and GPU, then leave reasonable overhead for transient spikes and future upgrades. Avoid choosing solely by the graphics card’s minimum recommendation; the complete system load and the manufacturer’s guidance both matter.

Size and Case Compatibility

Standard SFX units are compact, but SFX-L models can be longer. Check your case’s supported power-supply dimensions, cable-routing space, and mounting bracket requirements before ordering. Also confirm whether included cables are long enough for your layout.

Connectors and ATX Generation

Newer ATX 3.1 supplies with PCIe 5.1 or 12V-2×6 support can reduce adapter clutter and provide a more suitable connection for newer GPUs. Confirm the exact connector and cable configuration rather than assuming every listed standard includes the same accessories.

Efficiency, Noise, and Modularity

Higher 80 Plus ratings can reduce wasted power and heat, although efficiency varies with load. Fully modular cabling is particularly useful in small cases because unused cables can be removed. Fan size, semi-passive modes, and the manufacturer’s noise design also affect everyday comfort.

Who Should Buy Which Sfx Computer Power Supplies?

Choose a 500W model for a cost-conscious, low-to-mid-power compact computer. Choose 750W if you want a versatile gaming or creative-workstation supply without excessive capacity. Choose 850W for high-end GPUs, power-hungry processors, or longer upgrade plans. Choose 1,000W when your compact system has demanding components and the case supports the unit’s dimensions.

Before buying, verify the power supply’s length, connector layout, included cables, and warranty. A technically powerful unit is not a good fit if it cannot physically fit your case or route cables cleanly.