Choosing a power supply for a compact PC involves more than finding the smallest unit that fits. The right SFX model must provide enough continuous wattage, suitable connectors, efficient cooling, and reliable compatibility with your case and graphics card.
This roundup compares 10 SFX and SFX-L power supplies across different performance levels, including efficient modular models, high-wattage options for demanding GPUs, and budget-friendly choices for modest mini-ITX systems.
Best 10 Sfx Computer Power Supplies Picks for 2026
Best Quiet Platinum Choice
- 1000W Platinum-certified output
- Fanless mode below 40% load
- Flexible cables and ATX bracket included
Best For: Quiet high-performance compact PCs
Compact Budget Pick
- 500W SFX power for compact builds
- Split CPU, PCIe, and motherboard connectors
- Non-modular design with SATA and Molex support
Best For: Budget Mini-ITX and Micro ATX systems
Quiet Modern Choice
- 750W 80 Plus Gold SFX output
- ATX 3.1 and native 12V-2x6 support
- Fully modular cables with a 92mm FDB fan
Best For: Modern high-performance SFX gaming builds
Maximum SFX Headroom
Thermaltake Toughpower SFX 850W
- 850W 80 Plus Platinum power
- ATX 3.1 and PCIe Gen 5.1 ready
- Fully modular design with 12V-2x6 cable
Best For: Demanding gaming PCs and compact workstations
Quiet Platinum Value
- 80 Plus Platinum efficiency
- Zero RPM mode below 60°C
- Fully modular with ATX panel
Best For: Quiet compact gaming PCs needing flexible 750W power
Premium Quiet RGB Choice
- 120mm PWM fan with low-noise rating
- Includes 600W-capable 16-pin cable
- 10-year core warranty and ARGB
Best For: Premium SFX-L gaming PCs with RGB lighting
Best High-Output Pick – Cooler Master V850 SFX Gold
For compact systems that need substantial graphics power, the Cooler Master V850 SFX Gold is one of the more capable sfx computer power supplies. It delivers 850W in a fully modular SFX design and includes ATX 3.1 support with a 12V-2×6 connector rated for up to 600W to a compatible GPU.
Best For: Mini-ITX and SFF gaming, creator, and professional PCs that need high power in a compact chassis.
Pros:
- 850W output in a compact SFX form factor
- ATX 3.1 and PCIe 5.1-ready 12V-2×6 cable
- Fully modular design with customized cable lengths
- 80 PLUS Gold and Cybenetics Gold certifications
Cons:
- Short customized cables may require extensions in larger cases
- Higher-output capacity may be unnecessary for modest builds
The V850 is a strong balance of compact dimensions, modern GPU connectivity, efficiency, and long-term support, especially when a small build needs more headroom than a typical 750W unit.
Best Maximum-Power Option – Thermaltake Toughpower SFX 1000W
The Thermaltake Toughpower SFX 1000W is designed for compact PCs that require desktop-class power capacity. Among sfx computer power supplies, it stands out with 1000W output, 80 PLUS Platinum certification, a native 12V-2×6 connector, and full ATX 3.1 compatibility.
Best For: High-end SFX gaming systems and compact builds with demanding modern GPUs.
Pros:
- 1000W output in an SFX form factor
- 80 PLUS Platinum efficiency certification
- Native 12V-2×6 connector and PCIe Gen 5.1 readiness
- Includes an SFX-to-ATX adapter bracket
Cons:
- 1000W capacity may be excessive for lower-power systems
- Seven-year warranty is shorter than some alternatives in this roundup
With its high capacity, strict voltage regulation, low ripple specification, and included ATX adapter, this Toughpower model is a versatile choice when compact dimensions and maximum power take priority.
Best Balanced SFX Value – Cooler Master V750 SFX Gold
The Cooler Master V750 SFX Gold provides a practical power level for many modern small-form-factor PCs. It combines 750W output with a fully modular design, ATX 3.1 cabling, and a 12V-2×6 connector that can deliver up to 450W to a compatible GPU.
Best For: Mini-ITX gaming PCs seeking a compact, efficient power supply without stepping up to 850W or 1000W.
Pros:
- 750W capacity suited to many SFF gaming builds
- Fully modular cables help reduce clutter
- ATX 3.1 and PCIe 5.1-ready connectivity
- 80 PLUS Gold and Cybenetics Gold certifications
Cons:
- Short cables may need extensions in larger cases
- Lower capacity than the 850W and 1000W options here
The V750 is a sensible middle ground for buyers comparing sfx computer power supplies: it offers current-generation GPU support and efficient operation while avoiding unnecessary wattage for a balanced compact build.
Best Quiet Platinum Choice – LIAN LI SP1000P 1000W SFX
The LIAN LI SP1000P combines 1000W of SFX power with a fanless mode that activates at loads of 40% or below. For shoppers comparing sfx computer power supplies, its Platinum efficiency, flexible cables, and included SFX-to-ATX bracket make it suitable for both compact and standard-sized cases.
Best For: High-performance gaming or creator PCs where quiet low-load operation and flexible installation matter.
Pros:
- 1000W output with 80 PLUS Platinum certification
- Fanless operation at loads of 40% or below
- Flexible DC cables simplify routing and airflow
- Includes an SFX-to-ATX bracket and 10-year warranty
Cons:
- Heavier than the other listed units at 4.9 pounds
- Listed input voltage is limited to 120V AC
The SP1000P is especially compelling for users who want high wattage without constant fan operation during lighter workloads. Its Japanese 105°C capacitors and adaptable mounting add to its long-term appeal.
Compact Budget Pick – Apevia SFX-AP500W
The Apevia SFX-AP500W is a straightforward 500W option for builders looking for compact sfx computer power supplies for Mini-ITX, Micro ATX, or SFX systems. Its small chassis and included PCIe, SATA, Molex, CPU, and motherboard connectors support a range of basic small-form-factor configurations.
Best For: Budget-conscious Mini-ITX and Micro ATX builds with moderate power requirements.
Pros:
- Compact SFX dimensions fit space-constrained builds.
- 500W output supports many mainstream small-form-factor systems.
- Split 4+4 CPU, 6+2 PCIe, and 20+4 motherboard connectors improve compatibility.
- Includes three SATA and two Molex connectors.
Cons:
- Non-modular cables can make cable management harder in compact cases.
- Uses an 80mm fan rather than the larger fan found on some newer SFX models.
- The supplied specifications list a 115V input range, so verify regional compatibility.
This Apevia model emphasizes basic compatibility and compact sizing rather than premium modularity. Confirm the case fit, connector requirements, and total system power needs before choosing it for a small-form-factor build.
Quiet Modern Choice – Lian Li SP750 V2 750W
The Lian Li SP750 V2 combines 750W of output with an 80 Plus Gold rating, fully modular cabling, and ATX 3.1 support. For shoppers comparing sfx computer power supplies, its native 12V-2×6 cable and quiet 92mm FDB fan make it a well-equipped choice for current performance-oriented small-form-factor systems.
Best For: High-performance SFX builds that need modern GPU power support and cleaner cable management.
Pros:
- Fully modular cables help reduce clutter in compact cases.
- ATX 3.1-ready design supports PCIe Gen 5.0 platforms.
- Native 12V-2×6 cable is included for compatible graphics cards.
- 92mm fluid dynamic bearing fan is designed for quieter operation.
Cons:
- Its 750W capacity may not suit systems with exceptionally high power demands.
- Gold efficiency is below the Platinum rating offered by some competing SFX units.
- Verify that the SFX dimensions and included cable lengths suit your case.
With modern connectivity, modular wiring, and a 10-year warranty, the SP750 V2 is aimed at builders who want a longer-term SFX platform. Check your graphics card’s connector requirements and your case’s clearance before installation.
Maximum SFX Headroom – Thermaltake Toughpower SFX 850W
The Thermaltake Toughpower SFX 850W targets demanding compact systems that need substantial power in a small chassis. Among sfx computer power supplies, it stands out with 80 Plus Platinum certification, full modularity, ATX 3.1 compatibility, and an included 450W 12V-2×6 connector.
Best For: Power-hungry SFX workstations and gaming systems requiring high wattage and modern GPU support.
Pros:
- 850W output provides strong headroom for demanding components.
- 80 Plus Platinum certification targets high efficiency.
- Fully modular low-profile cables simplify compact-case installation.
- Includes ATX 3.1, PCIe Gen 5.1, and 12V-2×6 support.
Cons:
- Its higher capacity may be unnecessary for modest small-form-factor systems.
- The listed warranty is seven years, shorter than some competing premium SFX models.
- Confirm clearance because compact cases can vary in cable-routing space.
This Thermaltake unit is best suited to builders who would rather have generous power overhead than minimize capacity. Its modular design and low-ripple, tight-voltage-regulation claims add to its appeal for demanding builds, but the system’s actual power requirements should still guide the purchase.
Quiet Platinum Value – Redragon PSU015 750W SFX
For compact builds seeking efficient sfx computer power supplies, the Redragon PSU015 combines 750W output, 80 Plus Platinum certification, and fully modular cabling. Its Zero RPM fan mode keeps the system quiet at lower temperatures, while the included ATX-compatible panel broadens chassis compatibility.
Best For: Compact gaming PCs that need efficient 750W power, quiet operation, and flexible cable management.
Pros:
- 80 Plus Platinum certification supports high efficiency and reduced heat.
- Zero RPM mode keeps the fan off until temperatures reach 60°C.
- Fully modular white cables help reduce clutter and improve airflow.
- ATX 3.0 and PCIe 5.0-ready design supports high-performance graphics cards.
Cons:
- A 12VHPWR cable is not included.
- The ATX-compatible panel may require checking case fit before installation.
The PSU015 is a practical choice when quiet, efficient power matters more than premium extras. Its five-year warranty and Japanese capacitors add confidence, but buyers using newer GPUs should account for the missing 12VHPWR cable.
Modern Standard Pick – Thermaltake Toughpower SFX 750W
The Thermaltake Toughpower SFX 750W is one of the more forward-looking sfx computer power supplies, pairing Platinum efficiency with ATX 3.1 and PCIe Gen 5.1 compatibility. Its full modular design, low-profile cables, and included 300W 12V-2×6 connector suit clean, current-generation compact builds.
Best For: New SFX systems using modern graphics hardware and requiring ATX 3.1 connectivity.
Pros:
- 80 Plus Platinum certification delivers efficient compact power.
- ATX 3.1 and PCIe Gen 5.1 compatibility support newer platforms.
- Includes a 300W 12V-2×6 connector.
- Fully modular low-profile cables simplify installation and routing.
Cons:
- Its minimum input voltage is listed as 115V, limiting low-voltage flexibility.
- The 90mm fan is smaller than the 120mm fan used by some alternatives.
With strict voltage regulation, low ripple noise, and a seven-year warranty, this Thermaltake model is a strong fit for a modern compact PC. Confirm your case and regional input requirements before buying.
Premium Quiet RGB Choice – ASUS ROG Loki SFX-L 750W
The ASUS ROG Loki SFX-L 750W targets premium compact systems that value low noise, cooling, and visual customization. Among sfx computer power supplies, it stands out with a 120mm PWM-controlled fan, Aura Sync-compatible ARGB lighting, Platinum efficiency, and a bundled 16-pin PCIe cable.
Best For: Premium SFX-L gaming PCs where quiet cooling, RGB integration, and long warranty coverage matter.
Pros:
- 80 Plus and Cybenetics Platinum certifications support efficient operation.
- 120mm PWM fan and Lambda A certification target low-noise performance.
- Includes a 16-pin PCIe cable capable of up to 600W.
- Ten-year core warranty provides extended coverage.
Cons:
- SFX-L sizing may not fit cases designed only for standard SFX units.
- The four-pound weight and premium feature set may be more than basic builds need.
- RGB LED warranty coverage is three years rather than ten.
The ROG Loki is a compelling choice for a high-end, quiet SFX-L build, especially when integrated lighting and a long warranty are priorities. Verify SFX-L clearance and account for the separate RGB warranty period.
How We Picked the Best Sfx Computer Power Supplies
We evaluated these Sfx Computer Power Supplies by comparing their wattage, efficiency certification, form factor, modular-cable design, current-generation GPU support, and likely use cases. ATX 3.1 compliance, PCIe 5.1 or 12V-2×6 connectivity, and transient-load handling received extra consideration because newer graphics cards can produce brief power spikes.
We also considered practical installation details, including cable flexibility, cooling design, fan behavior, connector availability, and whether the unit is true SFX or the slightly longer SFX-L format. Always confirm dimensions and cable-clearance requirements against your case before purchasing.
Quick Comparison
| Build type | Recommended capacity | Useful features |
|---|---|---|
| Basic office or entry-level gaming PC | 500W–650W | Compact size, dependable protections, efficient operation |
| Mainstream gaming SFF build | 750W–850W | Fully modular cables, Gold or Platinum efficiency, modern GPU connector |
| High-end gaming or workstation PC | 850W–1000W | ATX 3.1, PCIe 5.1, 12V-2×6 cable, strong transient handling |
Key Buying Factors for Sfx Computer Power Supplies
Wattage and Power Headroom
Choose capacity based on the complete system rather than the graphics card alone. A quality 750W unit suits many mainstream gaming systems, while high-end GPUs and heavily upgraded CPUs may justify 850W or 1000W. Leave reasonable headroom so the supply is not constantly operating near its limit.
SFX Versus SFX-L Dimensions
Standard SFX units are typically shorter and offer the broadest case compatibility. SFX-L models can provide more internal space for cooling or components, but their extra length may interfere with drive cages, radiators, or cable routing. Check the manufacturer’s exact measurements.
Connectors and Standards
For a new graphics card, look for ATX 3.1 support and a native PCIe 5.1 or 12V-2×6 cable. These features can simplify installation and reduce reliance on bulky adapters. Confirm that the included cable supports your GPU’s required power level.
Efficiency, Acoustics, and Modularity
Gold and Platinum ratings indicate efficiency under defined testing conditions, not overall build quality. A fully modular design makes compact installations easier by letting you omit unused cables. Fan-stop or low-noise modes can also improve acoustics, though cooling performance remains the priority.
Who Should Buy Which Sfx Computer Power Supplies?
Budget-focused builders with modest components can consider a reputable 500W model. For balanced gaming systems, 750W SFX power supplies offer a useful combination of capacity, availability, and manageable heat. Choose 850W when pairing a compact build with a demanding GPU or power-hungry processor. A 1000W model is best for premium small-form-factor workstations, flagship graphics cards, or users who want substantial upgrade headroom.
Before ordering, verify the case standard, motherboard and GPU connectors, total cable length, and warranty terms. In a cramped enclosure, installation fit and thermal behavior matter just as much as the headline wattage.