GOLDEN FIELD 550W SFX Power Supply
4.4Editor score
80 Plus Platinum efficiency
Japanese capacitors inside
Ten year warranty
In this guide
Building a compact PC requires careful attention to thermal and acoustic performance. A low noise SFX power supply ensures your system runs quietly without sacrificing wattage or reliability for demanding tasks.
We evaluated ten leading models based on fan quality, efficiency ratings, and build standards. Each unit offers unique features tailored for mini ITX cases or space-conscious workstations needing silent operation.
Every pick highlights key strengths like modular cabling or advanced connectors. Prices fluctuate frequently, so verify current deals before purchasing to secure the best value for your specific setup needs.
Top 3 Picks for Best Low Noise Sfx Power Supply
LIAN LI SP750 V2 750W SFX Power Supply
4.5Editor score
ATX 3.1 certified
Native 12V-2×6 connector
Fully modular cabling
ASUS ROG Loki SFX-L 850W Platinum
4.6Editor score
Lambda A noise certified
120mm ARGB PWM fan
ROG heatsink protection
Top 10 Best Low Noise Sfx Power Supply in 2026 Compared
This side-by-side comparison highlights critical specifications across all ten units. Review efficiency ratings, fan sizes, connector types, and warranty terms to find the ideal match for your specific case constraints.
ProductsSpecificationsEditor scorePrice
Editor's Choice
LIAN LI SP750 V2
750 Watts Output
80 Plus Gold
92mm FDB Fan
10 Year Warranty
4.5Editor score
Editor's Choice
CORSAIR SF850 (2024)
850 Watts Output
80 Plus Platinum
92mm PWM Fan
Japanese Capacitors
4.3Editor score
Best Premium
CORSAIR SF850 (2024) Renewed
850 Watts Output
80 Plus Platinum
92mm PWM Fan
Japanese Capacitors
5.0Editor score
be quiet! SFX L Quiet Performance Power
600 Watts Output
80 Plus Gold
120mm Fan
Modular Cables
4.2Editor score
Cooler Master V850 SFX Gold
850 Watts Output
PCIe 5.1 Ready
90 Degree Cables
Enhanced Dissipation
4.4Editor score
GOLDEN FIELD 550W SFX
550 Watts Output
80 Plus Platinum
Japanese Capacitors
10 Year Warranty
4.4Editor score
Thermaltake Toughpower SFX
1000 Watts Output
80 Plus Platinum
90mm FDB Fan
ATX 3.1
4.1Editor score
Silverstone ST30SF V2
300 Watts Output
80 Plus Bronze
92mm Silent Fan
24/7 Operation
4.4Editor score
ASUS ROG Loki SFX-L 850W Platinum
850 Watts Output
Lambda A Certified
120mm ARGB Fan
10 Year Warranty
4.6Editor score
Silverstone SST-SX700-G
700 Watts Output
80 Plus Gold
92mm FDB Fan
Japanese Capacitors
4.2Editor score
1. LIAN LI SP750 V2 – Best Low Noise Sfx Power Supply
LIAN LI SP750 V2 750W SFX Power Supply
92mm FDB Fan
ATX 3.1 Certified
Fully Modular Design
Native 12V-2×6
The LIAN LI SP750 V2 stands out with robust compliance to modern power standards. It scores a solid 4.5 rating among users who prioritize stability and acoustic performance in small chassis.
Pros
- Compliant with latest ATX 3.1 standard
- Visual cues on new connector
- Upgraded standby power rail
- Quiet fluid dynamic bearing fan
- Reliable ten year protection
Cons
- High price for entry level
- Requires specific case fitment
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Its native 12V-2×6 connector features a distinct two-tone design that ensures safe and clear connections for high-performance graphics cards. The upgraded standby rail supports power-hungry peripherals effectively.
While it is not the cheapest option available, the build quality justifies the investment for those seeking longevity. The fully modular design reduces clutter significantly within tight internal spaces.
This unit is ideal for builders planning next-generation GPU upgrades. You should choose it if you value safety features and efficient cooling without compromising on silence.
Safe Connections with Visual Cues
The two-tone cable design prevents misalignment issues during installation for critical power delivery.
Efficient Thermal Management
Fluid dynamic bearings reduce friction and noise while maintaining optimal internal temperatures for components.
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2. CORSAIR SF850 (2024) – Low Noise Sfx Power Supply
CORSAIR SF850 (2024) Fully Modular Low Noise ATX Power Supply – Black
80 Plus Platinum Rated
ATX 3.0 Compliant
92mm PWM Fan
Japanese Capacitors
This 2024 model delivers massive Platinum power in a small footprint. It holds a 4.3 rating from enthusiasts who need high wattage without using standard ATX dimensions.
Pros
- Platinum efficiency saves energy
- High power in compact size
- Flexible Type-5 connectors
- Reliable Japanese capacitors
- Quiet cooling performance
Cons
- Higher price than competitors
- Limited to 850 watt output
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Its Type-5 Micro-Fit connectors allow for tidy cable management in restricted spaces. The 92mm PWM fan provides powerful cooling while maintaining low-noise operation thanks to fluid dynamic bearings.
Cost may be a consideration for budget-conscious builders. However, the reliability offered by 105°C rated capacitors ensures unwavering power stability over many years of use.
Select this unit if you need maximum power density. It suits users who value efficiency and quiet operation in a compact SFX package.
High Density Power Delivery
Platinum rating ensures minimal energy loss and heat generation during intensive computing tasks.
Compact Cooling Solution
PWM control adjusts fan speed intelligently to balance airflow with acoustic comfort effectively.
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3. CORSAIR SF850 (2024) Renewed – Low Noise Sfx Power Supply
CORSAIR SF850 (2024) Fully Modular Low Noise 80 Plus Platinum ATX Power Supply – 3.0 Compliant – PCIe 5.0 Ready – SFX-to-ATX Bracket Included – Black (Renewed)
80 Plus Platinum Rated
PCIe 5.0 Ready
Fully Modular Connectors
Japanese Capacitors
This renewed model offers exceptional value for buyers seeking top-tier performance. It has achieved a perfect 5.0 rating, indicating high satisfaction among users who selected this option.
Pros
- Excellent value for renewed unit
- Perfect score in reviews
- Platinum rated efficiency
- High power compact design
- Quiet fluid dynamic bearing
Cons
- Renewed status lacks warranty
- Limited availability stock
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Like its new counterpart, it features robust Japanese capacitors and a 92mm PWM fan. These elements ensure unwavering power stability and quiet operation even under heavy system loads.
Buying renewed means potentially shorter protection periods compared to new items. Despite this, the cost savings can be significant for those comfortable with refurbished electronics.
This choice is ideal for cost-effective high performance. You should pick it if you want Platinum reliability in a small form factor at a lower price point.
Cost Effective Performance
Renewed units offer the same technical specs as new ones at a reduced cost significantly.
Quiet Operational Profile
Fluid dynamic bearing technology minimizes noise while providing necessary thermal cooling internally.
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4. be quiet! SFX L Quiet Performance Power – Low Noise Sfx Power Supply
be quiet! SFX L Quiet Performance Power 600W 80 Plus Gold Quiet Performance Power Supply for Mini ITX Pcs and Compact Gaming Systems | BN639
80 Plus Gold
4 PCIe Connectors
120mm High Quality Fan
Modular Cables
be quiet! focuses heavily on acoustic performance with this 600W unit. It earns a 4.2 rating for those needing multi GPU support within a compact SFX frame.
Pros
- Temperature controlled 120mm fan
- High efficiency Gold certification
- Multi GPU support included
- Modular cables for build
- Includes SFX to ATX adapter
Cons
- Smaller wattage than others
- Warranty limited to three years
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The temperature-controlled 120mm high-quality fan allows for flexible cooling. Modular cables ensure maximum build flexibility while maintaining a tidy internal layout for small PC chassis.
Its Gold efficiency helps reduce heat generation effectively. However, the three-year warranty is shorter than some competitors offering longer protection plans.
This unit fits compact gaming needs well. Choose it if you prioritize silence and flexible cabling in a Mini ITX case without needing extreme wattage.
Temperature Controlled Cooling
The fan adjusts speed based on load to ensure quiet operation during lighter daily tasks.
Versatile Mounting Options
The included adapter bracket makes this unit usable in larger cases requiring ATX dimensions.
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5. Cooler Master V850 SFX Gold – Low Noise Sfx Power Supply
Cooler Master V850 SFX Gold ITX SFF Power Supply, PCIe 5.1 Ready
PCIe 5.1 Ready
90 Degree Durable Cables
600W Power Delivery
Enhanced Dissipation
This V850 SFX Gold offers a mini design that is powerful for gamers. It holds a 4.4 rating, reflecting its suitability for professionals and creators needing robust power.
Pros
- Improved electrical durability cables
- Delivers up to 600W to GPU
- Top performance and cooling
- Flexible cable design
- Reduces internal clutter
Cons
- Longer cables might be needed
- Price point is higher
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The 90° durable cables offer improved electrical durability and safety. Enhanced dissipation ensures top performance while keeping critical components cool under sustained usage conditions.
Users may find that extended cables are needed for larger cases. The premium price reflects the advanced technology used in the transformer and rectifier design.
This unit suits creators and pros well. Select it if you require durable connectors and high efficiency in a compact ITX power supply package.
Durable Connector Design
The 90-degree orientation protects the connector from bending and improves electrical safety over time.
Cooling Efficiency
Integrated design ensures heat is dissipated effectively to maintain stable operation under load.
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6. GOLDEN FIELD 550W SFX – Low Noise Sfx Power Supply
GOLDEN FIELD 550W SFX Power Supply
80 Plus Platinum
100% Japanese Capacitors
ATX 3.1 Ready
10 Year Warranty
GOLDEN FIELD delivers exceptional energy savings with this 550W unit. It has earned a strong 4.4 rating for reducing heat and electricity costs effectively in small builds.
Pros
- Delivers up to 93% efficiency
- Pure copper transformer
- Fully modular design
- Low noise PWM fan
- Excellent warranty coverage
Cons
- No 12V-2×6 cable included
- Brand less known than others
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Using 100% Japanese capacitors ensures stability and longevity. The fully modular design simplifies cable management while tinned copper cores offer superior conductivity.
Notably, this model does not include the 12V-2×6 cable yet. Despite this limitation, the long warranty provides peace of mind for your investment over time.
This budget-friendly choice is ideal for ITX builds. You should pick it if you value efficiency and reliability without paying premium brand pricing.
Exceptional Energy Efficiency
Platinum efficiency reduces wasted energy and heat compared to lower tier power supply options available.
Superior Conductivity
Tinned copper cores resist oxidation and ensure reliable power delivery for your components.
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7. Thermaltake Toughpower SFX – Low Noise Sfx Power Supply
Thermaltake Toughpower SFX Form Factor 1000W 80+ Platinum Power Supply (PCI-E 5.1/ATX 3.1 Standard); 600W 12V-2×6 Connector Included; Full Modular; 90mm FDB Fan; 7 Year Warranty; PS-STP-1000FNFAPU-1
1000 Watts Output
Native 12V-2×6
Low Ripple Noise
Strict Voltage Regulation
This unit brings limitless performance in a compact SFX size. It holds a 4.1 rating from users needing extreme power density without using a large ATX chassis.
Pros
- Massive 1000 watt capacity
- Fully compatible ATX 3.1
- Very low ripple noise
- Flexible compact size
- Includes 600W connector
Cons
- Higher price point
- Heavy for small cases
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It features a native 12V-2×6 connector and strict voltage regulation under 2%. The 90mm FDB fan balances cooling needs while maintaining a quiet operational profile.
It may be heavier than other options available. This added weight reflects the high-end components inside designed to handle massive spikes reliably.
This PSU fits high-end needs perfectly. Select it if you need 1000W in an SFX package and prioritize strict voltage stability.
Limitless Performance Density
Compact form factor provides high power outputs suitable for demanding professional workstation setups.
Stability Under Load
Strict voltage regulation ensures components receive consistent power even during high stress usage scenarios.
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8. Silverstone ST30SF V2 – Low Noise Sfx Power Supply
Silverstone ST30SF V2 80 Plus Bronze 300W SFX Power Supply, SST-ST30SF V2
300 Watts Output
80 Plus Bronze
Single 12V Rail
24/7 Operation Rated
This Silverstone model provides reliable power for basic mini ITX builds. It scores a 4.4 rating for its continuous output capability at standard operating temperatures.
Pros
- Continuous power at 40°C
- Silent running 92mm fan
- Single 12V rail
- Includes ATX bracket
- Budget friendly price
Cons
- Lower Bronze efficiency rating
- 300W limits GPU choice
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The single 12V rail ensures stable power delivery. Its silent running 92mm fan supports 24/7 operation without excessive noise in quiet environments.
Bronze efficiency is lower than Platinum options. However, the low cost makes it a viable choice for systems with low power consumption needs.
This unit suits entry-level builds well. Choose it if you need a small PSU for basic office PCs or older gaming systems.
Reliable Continuous Operation
Rated for continuous operation at 40 degrees Celsius, ensuring reliability in enclosed case environments.
Compact Cooling Design
The silent 92mm fan keeps noise low while moving enough air for standard usage loads.
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9. ASUS ROG Loki SFX-L 850W Platinum – Low Noise Sfx Power Supply
ASUS ROG Loki SFX-L 850W Platinum (Fully Modular Power Supply, 80+ Platinum, Lambda A Certified, 120mm PWM ARGB Fan, Aura Sync, ATX 3.0 Compatible, PCIe 5.0 Ready, 10 Year Warranty)
Lambda A Certified
120mm PWM ARGB Fan
Below 25 dB Noise
80 Plus Platinum
ASUS ROG Loki sets the standard for high-end SFX solutions. It achieves a 4.6 rating for those needing absolute low noise and maximum reliability for serious setups.
Pros
- Lambda A noise certification
- Below 25 dB acoustic levels
- Lower temps from heatsinks
- Full ATX 3.0 compatible
- Aura Sync RGB support
Cons
- Highest price in list
- ARGB adds extra wiring
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Its Lambda A certification confirms acoustic performance below 25 dB. ROG heatsinks cover critical components to lower temps and reduce noise further.
The price is high compared to others. But the Aura Sync support and 120mm fan provide aesthetic and acoustic benefits worth the premium for enthusiasts.
This unit suits elite builders perfectly. You should pick it if you value silence and aesthetic integration in a high performance compact build.
Absolute Quiet Operation
Lambda A certification guarantees acoustic levels below 25 dB for truly silent PC environments.
Advanced Thermal Control
ROG heatsinks protect critical components to lower operating temperatures and extend unit lifespan.
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10. Silverstone SST-SX700-G – Low Noise Sfx Power Supply
Silverstone Technology SST-SX700-G 700W SFX Fully Modular 80 Plus Gold PSU with Improved 92mm Fan and Japanese Capacitors.
700 Watts Output
80 Plus Gold
18 dBA minimum Fan
100% Modular Cables
This Silverstone model offers robust 700W output for compact systems. It holds a 4.2 rating for users seeking Gold efficiency and reliable voltage regulation.
Pros
- 100% modular cables
- Silent 92mm FDB fan
- Single 12V rail
- Japanese capacitors included
- Strict voltage regulation
Cons
- Not compatible with ATX holes
- Fixed mounting style
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All cables are flexible flat arrays making them easy to manage. The fan operates with a silent minimum of 18 dBA for quiet daily use.
It is not compatible with ATX mounting holes which limits case options. Its single 12V rail ensures stable power for components.
This unit fits mid-range builds well. Choose it if you want silent operation and modular convenience in a standard SFX case.
Quiet FDB Fan Design
Fluid dynamic bearings reduce noise significantly for minimal acoustic disruption during normal system tasks.
Strict Regulation
Strict voltage regulation and low ripple ensure components receive stable power for longer life.
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Buying Guide – How to Choose the Best Low Noise Sfx Power Supply
Selecting a compact PSU requires balancing size, wattage, and acoustic comfort. Consider these factors to match the unit to your specific case and system needs.
Form Factor Compatibility
Ensure your case supports SFX or SFX-L dimensions. Some models include brackets for ATX cases but may still face clearance issues with large fans.
Always verify case dimensions before purchasing to avoid assembly problems.
Wattage Requirements
Calculate your GPU and CPU power needs. SFX units typically max out at 1000W, so high-end dual GPU setups may require larger solutions.
Choose a unit with headroom to handle transient spikes effectively.
Noise Levels and Fan Size
Look for larger fans like 120mm in SFX-L designs. These spin slower at the same airflow, reducing audible noise compared to smaller 90mm alternatives.
Units with Lambda A or similar certifications guarantee lower acoustic performance.
Connector Standards
Modern GPUs need 12V-2×6 or PCIe 5.1 connectors. Check if the PSU includes these native cables to avoid adapters that add clutter.
Verify cable types match your motherboard and peripheral requirements.
Modularity
Fully modular cables let you plug in only what you need. This reduces clutter and improves airflow in small cases with limited space.
Semi-modular units have fixed cables that might interfere with compact builds.
Efficiency Ratings
Higher efficiency like Platinum or Titanium saves energy and reduces heat output. Less heat means less need for the internal fan to spin aggressively.
Look for 80 Plus Platinum to minimize electrical losses.
Capacitor Quality
Japanese capacitors ensure better stability and longevity. They handle heat and electrical stress better than cheaper alternatives often found in budget units.
Prioritize units listing 100% Japanese capacitors for reliability.
Warranty and Support
A ten-year warranty often reflects high build quality. Check what coverage the manufacturer offers for defects or failures in your region.
Ensure support channels are accessible before purchasing.
How to Use and Care for Your Low Noise Sfx Power Supply
Always use the included mounting screws to secure the PSU firmly. A loose unit can vibrate and create unwanted noise inside the chassis.
Route cables cleanly to maximize airflow. Ensure no cables block the fan intake to maintain acoustic performance and cooling efficiency.
Keep the vents clear of dust regularly. Dust buildup reduces airflow and forces the fan to spin louder, increasing noise levels over time.
Frequently Asked Questions
What makes a power supply truly low noise?
A truly low noise PSU uses high-quality fans with fluid dynamic bearings. It also features good thermal design so the fan runs slower or stays off under light loads.
Are SFX power supplies loud?
SFX units can be loud if they lack quality fans. However, premium models use 120mm fans or high-quality 92mm fans to keep noise levels below 25 dB effectively.
Does higher efficiency mean quieter operation?
Yes, higher efficiency units generate less heat. This allows the fan to run at lower speeds, which significantly reduces acoustic noise during daily usage.
What size fan is best for quiet SFX PSUs?
A 120mm fan in an SFX-L case is ideal because it moves air at lower RPMs. Smaller 90mm fans must spin faster to cool the same internal components.
Should I choose a modular power supply?
Yes, fully modular options are best for small builds. You only connect necessary cables which improves airflow and reduces clutter inside tight chassis cases.
How do I know if my case fits SFX?
Check your case manual for supported power supply dimensions. Most Mini ITX cases support SFX standard, while SFX-L requires extra clearance for longer units.
Do modern GPUs need special power connectors?
Yes, new high-performance GPUs require 12V-2×6 connectors. Ensure your PSU has native support to avoid using bulky adapters that add heat and noise.
Is Platinum efficiency worth the extra cost?
Platinum efficiency saves energy and reduces heat output. For silent builds, this means less fan activity and lower noise levels over the lifespan of the unit.
Final Thoughts on Choosing the Best Low Noise Sfx Power Supply
Our top picks include the LIAN LI SP750 V2 for overall value and the ASUS ROG Loki for premium silence. These units balance efficiency, power, and acoustic comfort effectively.
Prioritize native connector support and fan quality for the best acoustic results. Ensure your case supports the chosen SFX standard before finalizing any purchase decision.
Always verify current deals as prices fluctuate frequently. This guide covers the best current options for quiet and reliable small form factor computing needs.