CORSAIR SF850 (2024)
4.3Editor score
80 PLUS Platinum Rated
ATX 3.0 Compliant
105 Degree C Capacitors
In this guide
Choosing the right 850W SFX power supply is crucial for small form factor builds. These compact units deliver high wattage in a tiny footprint, perfect for ITX cases where space is limited.
We evaluated ten leading models based on efficiency ratings, cable management, noise levels, and compliance with ATX 3.1 standards. Each product offers unique benefits for different build needs.
Every pick below highlights specific strengths like cooling technology or connector compatibility. Prices fluctuate frequently, so verify current listings before purchasing your next high-performance power unit.
Top 3 Picks for Best 850W Sfx Power Supply
Cooler Master V850 SFX Gold
4.4Editor score
ATX 3.1 Cables
90 Degree Durable Cables
Enhanced Dissipation Design
GAMEMAX SFX Power Supply
4.2Editor score
80 Plus Gold Certified
ATX 3.0 Ready
Robust Protection Features
Top 10 Best 850W Sfx Power Supply in 2026 Compared
This side-by-side comparison highlights the key specifications and unique features of every reviewed unit to help you decide which power supply fits your specific build requirements.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Cooler Master V850 SFX
850W Output Power
ATX 3.1 Ready
Gold Efficiency Rating
90 Degree Cables
4.4Editor score
Editor's Choice
CORSAIR SF850 (2024)
Platinum Efficiency Rating
ATX 3.0 Compliant
92mm PWM Fan
Japanese Capacitors
4.3Editor score
Best Budget
Vetroo 850W Black SFX
PCIe 5.1 Support
Full Modular Design
SFX to ATX Bracket
80 Plus Gold
4.6Editor score
GAMEMAX SFX Power Supply
90% Efficiency
Ultra Quiet FDB Fan
12VHPWR Connector
Multi Protection
4.2Editor score
Lian Li SP0850P Platinum
Smart Cooling Mode
SFX to ATX Bracket
Platinum Efficiency
100% Japanese Caps
4.1Editor score
be quiet! Pure Power 13 M
94.4% Efficiency
ATX 3.1 Standard
Semi-Passive Cooling
12V-2×6 Connector
4.6Editor score
Thermaltake Toughpower SFX
Platinum Certified
ATX 3.1 Standard
90mm FDB Fan
7 Year Warranty
4.2Editor score
Super Flower Combat SFX FG
Full Modular Design
Cybenetics Gold Certified
ATX 3.1 Compliant
Ribbon Cables
4.5Editor score
CORSAIR SF850 Renewed
80 PLUS Platinum
ATX 3.0 Ready
Fluid Dynamic Bearing
Type-5 Connectors
5.0Editor score
Lian Li SX0850P Platinum
Smart Cooling Tech
ATX 3.1 Standard
Flexible Braided Cables
120mm FDB Fan
4.5Editor score
1. Cooler Master V850 SFX Gold – Best Overall 850W Sfx Power Supply
Cooler Master V850 SFX Gold
ATX 3.1 Ready
90 Degree Cables
PCIe 5.1 Ready
Enhanced Cooling Design
The Cooler Master V850 SFX Gold is the top-rated unit for small form factor builds. It balances powerful performance with a mini design that fits tight ITX chassis.
Pros
- Compact SFX Design
- 90 Degree Connectors
- Supports PCIe 5.1
- Enhanced Cooling
- Full Modular Cables
Cons
- May need extender
- Premium price
We may earn a commission when you buy through this link, at no additional cost to you.
Its standout feature is the 90 degree durable cables which improve electrical safety. ATX 3.1 cables deliver up to 600W to your GPU for next gen support.
Enhanced dissipation ensures top performance and cooling under load. Customized cable length reduces clutter though extended cables might be needed for larger cases.
Gamers and professionals seeking reliable power should choose this supply. It offers the best blend of modern standards and build quality for SFX requirements.
Improved Electrical Durability
The 90 degree 12VHPWR PCIe 5.1 connector enhances safety and durability.
Efficient Heat Management
Integrated transformer and metal design ensure optimal thermal performance.
We may earn a commission when you buy through this link, at no additional cost to you.
2. CORSAIR SF850 (2024) – Best Premium 850W Sfx Power Supply
CORSAIR SF850 (2024)
80 PLUS Platinum
ATX 3.0 Compliant
92mm PWM Fan
105C Capacitors
The CORSAIR SF850 delivers massive power in a compact SFX form-factor. It is perfect for dense small-form-factor PCs or saving space in larger cases.
Pros
- High Platinum Efficiency
- Fully Modular Design
- Low Noise Operation
- High Temp Caps
- ATX 3.0 Ready
Cons
- Higher price point
- Type-5 connectors
We may earn a commission when you buy through this link, at no additional cost to you.
Compliance with ATX 3.0 and PCIe 5.0 ensures transient power spikes are resisted. Fully modular Type-5 connectors allow flexible cabling for tidy management.
The 92mm PWM cooling fan delivers powerful cooling with low-noise operation. Japanese capacitors rated at 105 degrees C ensure unwavering power reliability.
High-end builders wanting premium efficiency and quiet operation should choose this. It stands out for reliability in demanding computing environments.
Power Density Excellence
This unit provides massive power in a compact SFX form-factor for dense builds.
Superior Durability
105 degree C rated Japanese capacitors provide unwavering power and reliability.
We may earn a commission when you buy through this link, at no additional cost to you.
3. Vetroo 850W Black SFX – Best Budget 850W Sfx Power Supply
Vetroo 850W Black SFX
ATX 3.1 Ready
PCIe 5.1 Support
Full Modular Design
80 Plus Gold
The Vetroo 850W Black SFX brings the latest ATX 3.1 standard to budget buyers. It supports PCIe 5.1 for improved performance and efficiency in modern systems.
Pros
- Affordable Price
- ATX 3.1 Ready
- Full Modular
- SFX to ATX Bracket
- PCIe 5.1
Cons
- Newer brand
- Limited availability
We may earn a commission when you buy through this link, at no additional cost to you.
Full modular design lets you install only the cables you need to reduce clutter. The unit is compatible with mini ITX chassis or ATX cases with the bracket.
It meets 80 Plus Gold certification standards for reliable performance and energy savings. This makes it perfect for any PC builder seeking cost effective modern power.
Gaming PCs needing high wattage without premium costs should consider this option. It offers a strong entry into high spec small form factor power.
Future Ready Connectivity
Supports PCIe 5.1 and ATX 3.1 for next-gen component compatibility.
Versatile Fit
Includes bracket for expansion to ATX size when needed.
We may earn a commission when you buy through this link, at no additional cost to you.
4. GAMEMAX SFX Power Supply – Value 850W Sfx Power Supply
GAMEMAX SFX Power Supply
80 Plus Gold
ATX 3.0 Ready
Ultra Quiet FDB Fan
12VHPWR Connector
The GAMEMAX SFX Power Supply combines efficiency with robust protection against voltage issues. It features main Japanese capacitors for product quality and stability.
Pros
- Solid Protection
- 90% Efficiency
- 12VHPWR Included
- Japanese Capacitors
- Full Modular
Cons
- Average ratings
- Fan size
We may earn a commission when you buy through this link, at no additional cost to you.
Compliance with ATX 3.0 and PCIe 5.0 includes a 12VHPWR connector. This can provide up to 600W for power hungry graphics cards in compact chassis.
An ultra quiet FDB fan provides high performance heat dissipation without noise. Trust in the heavy-duty protection suite for worry-free operation of sensitive parts.
Builders needing reliable power with strong protection features will appreciate this unit. It offers great value with modern connectivity standards.
Robust Protection
Heavy-duty protection against OVP, UVP, OPP, and other issues.
Modern GPU Support
Comes with a 12VHPWR connector for up to 600W GPU power.
We may earn a commission when you buy through this link, at no additional cost to you.
5. Lian Li SP0850P Platinum – Quiet 850W Sfx Power Supply
Lian Li SP0850P Platinum
Smart Cooling Mode
Platinum Efficiency
Super Flexible Cables
100% Japanese Caps
The Lian Li SP0850P Platinum features smart cooling with a fanless mode at low load. This ensures silent operation and extended fan life for quiet systems.
Pros
- Fanless Low Load
- Flexible Cables
- Platinum Rated
- Compact Size
- Brackets Included
Cons
- Lower rating
- Price
We may earn a commission when you buy through this link, at no additional cost to you.
Flexible DC cables simplify routing for a clean, clutter-free build. The included SFX-to-ATX bracket allows seamless installation in both compact and standard cases.
Up to 92% efficiency ensures a cooler and more energy-efficient system. Premium 105 degree C Japanese capacitors are used for superior durability.
Gamers and creators prioritizing silence and cable management should select this PSU. It is engineered for high performance and silent operation in SFX builds.
Silent Operation
Fanless mode activates at 40 percent load for silent operation.
Flexible Installation
Included bracket enables installation in SFX or ATX cases.
We may earn a commission when you buy through this link, at no additional cost to you.
6. be quiet! Pure Power 13 M – Efficient 850W Sfx Power Supply
be quiet! Pure Power 13 M
80 Plus Gold
ATX 3.1 Standard
Semi-Passive Cooling
12V-2×6 Connector
The be quiet! Pure Power 13 M offers up to 94.4 percent efficiency. This lower power consumption results in cooler and quieter operation for any gaming PC.
Pros
- 94.4% Efficiency
- ATX 3.1 Ready
- Zero RPM Mode
- 12V Rail
- Full Modular
Cons
- Brand availability
- No 12VHPWR
We may earn a commission when you buy through this link, at no additional cost to you.
It includes the 12V-2×6 connector for next-generation PCIe 5.1 graphics cards. It handles power excursions up to double its rated power with ease.
Semi-passive cooling turns the fan off completely under low load for silence. LLC topology provides best-in-class voltage regulation and efficiency.
Builders of quiet systems or media creation PCs will find this unit ideal. It combines high efficiency with reliable power standards.
High Efficiency
Up to 94.4 percent efficiency ensures low power consumption.
Zero RPM Cooling
Fan turns off completely under low load for silence.
We may earn a commission when you buy through this link, at no additional cost to you.
7. Thermaltake Toughpower SFX – Durable 850W Sfx Power Supply
Thermaltake Toughpower SFX
Platinum Efficiency
ATX 3.1 Standard
Full Modular Cables
7 Year Warranty
The Thermaltake Toughpower SFX offers compact power with limitless performance. It is certified Platinum and fully compatible with ATX 3.1 standards.
Pros
- Low Ripple Noise
- PCIe 5.1 Ready
- Platinum Certified
- Long Warranty
- Full Modular
Cons
- Fan size
- Price
We may earn a commission when you buy through this link, at no additional cost to you.
It includes a 12V-2×6 connector and delivers low ripple noise below 30mV. Voltage regulation remains extremely strict at less than plus minus 2 percent.
A 7 year warranty provides long-term peace of mind for builders. Fully modular low-profile cables help with cable management in tight spaces.
Enthusiasts needing proven reliability and low noise will value this unit. It stands out for its rigorous standards and support warranty.
Low Ripple Noise
Delivers less than 30mV low ripple noise for clean power.
Strict Regulation
Extremely strict voltage regulation under plus minus 2 percent.
We may earn a commission when you buy through this link, at no additional cost to you.
8. Super Flower Combat SFX FG – Reliable 850W Sfx Power Supply
Super Flower Combat SFX FG
Full Modular Design
ATX 3.1 Standard
Cybenetics Gold
Ribbon Cables
The Super Flower Combat SFX FG uses a full modular design with all ribbon cables. This maximizes flexibility and efficiency through Cybenetics Gold certification.
Pros
- Full Modular
- ATX 3.1 Ready
- Modern Standby
- Ribbon Cables
- Gold Certified
Cons
- New model
- Limited info
We may earn a commission when you buy through this link, at no additional cost to you.
It is compliant with ATX 3.1 standard and resists transient power spikes. Modern Standby compatibility ensures it works with modern power management protocols.
Full range auto voltage detection supports 100V to 240V inputs reliably. This allows use across different power standards worldwide without extra adapters.
Builders seeking flexible cabling and modern specs will appreciate this model. It offers a clean look with high standard compliance.
Cable Flexibility
All ribbon cables maximize flexibility in tight SFX builds.
Modern Standby
Modern Standby Compatible for improved energy management.
We may earn a commission when you buy through this link, at no additional cost to you.
9. CORSAIR SF850 Renewed – Value Premium 850W Sfx Power Supply
CORSAIR SF850 Renewed
Platinum Efficiency
ATX 3.0 Ready
SFX to ATX Bracket
Type-5 Connectors
This renewed CORSAIR SF850 offers massive Platinum-rated power in a compact form. It supports ATX 3.0 and PCIe 5.0 for modern platforms.
Pros
- Platinum Rated
- Included Bracket
- Fully Modular
- Fluid Bearing
- High Rating
Cons
- Renewed product
- Older standard
We may earn a commission when you buy through this link, at no additional cost to you.
The included SFX-to-ATX bracket allows versatility in both compact and standard cases. Type-5 connectors enable flexible cabling that takes up less space.
92mm PWM cooling delivers powerful low-noise operation thanks to fluid dynamic bearings. Japanese capacitors ensure unwavering power and reliability under load.
Budget conscious users seeking premium specs should consider this renewed option. It brings high-end features to a more accessible tier.
Versatility Included
SFX-to-ATX bracket included for seamless installation options.
Cooling Performance
Fluid dynamic bearing fan ensures low noise operation.
We may earn a commission when you buy through this link, at no additional cost to you.
10. Lian Li SX0850P Platinum – Compact ATX 850W Sfx Power Supply
Lian Li SX0850P Platinum
Smart Cooling Tech
ATX 3.1 Standard
Flexible Braided Cables
120mm FDB Fan
The Lian Li SX0850P Platinum combines compact ATX form with advanced features. It achieves up to 92% efficiency ensuring cooler and energy-efficient operation.
Pros
- Smart Cooling
- Braided Cables
- ATX 3.1 Ready
- 120mm Fan
- RMA Support
Cons
- Larger size
- Complexity
We may earn a commission when you buy through this link, at no additional cost to you.
Flexible braided cables facilitate effortless cable management reducing clutter. It supports fanless mode at 40% load for silent operation under light use.
A 120mm FDB fan with max speed of 2000 RPM handles high loads. RMA support is available for missing parts or issues quickly.
Creators needing versatile connectivity and high efficiency should pick this unit. It bridges compact ATX with high-performance features.
Silent Fanless Mode
Fanless mode at 40 percent load enables silent operation.
Effortless Management
Flexible braided cables reduce clutter in complex builds.
We may earn a commission when you buy through this link, at no additional cost to you.
Buying Guide – How to Choose the Best 850W Sfx Power Supply
Selecting a power supply for small form factor builds requires careful attention to efficiency, noise, and connectivity standards.
ATX 3.1 and PCIe 5.1 Compatibility
Modern builds benefit from ATX 3.1 and PCIe 5.1 support which provides native cables for next gen graphics cards. This prevents adapter needs and improves transient power spike resistance.
Always verify if the unit includes native 12VHPWR connectors for future proofing.
Efficiency Ratings
Efficiency ratings like 80 Plus Gold or Platinum indicate energy efficiency. Higher ratings mean less wasted electricity and cooler operation which is vital in compact cases.
Choose at least Gold certification to ensure reliable performance and lower heat output.
Modular Cable Design
Fully modular designs allow you to connect only necessary cables reducing clutter. In tight ITX cases this improves airflow and aesthetic appeal significantly.
Ensure the cables are high quality and flexible to simplify routing inside small chassis.
Cooling Solutions
Look for fluid dynamic bearing fans or semi-passive modes that stop fans at low load. Silent operation is a major factor in compact builds where fans are close to ears.
Fanless modes at lower loads extend fan life and keep the build quieter overall.
Physical Dimensions and Brackets
Check if the unit fits your specific SFX case or includes a bracket for ATX conversion. Some units are slightly longer or wider which may limit compatibility.
A included SFX to ATX bracket adds versatility if you plan to upgrade cases later.
Capacitor Quality and Reliability
Japanese capacitors rated for high temperatures provide superior durability. They maintain stable voltage under thermal stress ensuring system longevity and performance.
Prioritize models that specify high grade internal components for long term use.
Protection Features
Robust protection against over voltage under voltage and short circuits is critical. It safeguards your expensive hardware from unstable power conditions.
Verify the presence of standard protections like OVP and OTP before purchasing.
Warranty and Support
Warranty length indicates manufacturer confidence in their product. Longer warranties reduce risk and offer peace of mind for expensive power units.
Consider units with at least a 5 to 7 year warranty for better protection.
How to Use and Care for Your 850W Sfx Power Supply
Ensure proper ventilation by installing the PSU in a location with sufficient airflow. Dust accumulation can restrict cooling so clean filters regularly with compressed air.
Connect all necessary power cables firmly to avoid loose connections that may cause instability. Use cable ties to manage excess length and keep air paths clear.
Monitor system stability after installation. If you experience power drops or shutdowns check connections and ensure load stays within rated limits.
Frequently Asked Questions
Does 850W SFX power supply support latest GPUs?
Yes models with ATX 3.1 and PCIe 5.1 support include native 12VHPWR connectors. This allows direct connection to the newest graphics cards without needing adapters.
What is the difference between SFX and ATX units?
SFX units are much smaller than standard ATX units designed for compact ITX cases. They offer similar power in a reduced footprint but may cost more per watt.
Can I use an SFX unit in a larger case?
Yes you can use an SFX unit in an ATX case often with a bracket. This saves space inside the case and leaves room for other components.
Is platinum efficiency better than gold?
Platinum efficiency means less energy is wasted as heat and can be quieter. However gold is sufficient for most builds so choose based on your cooling and budget needs.
Are modular cables worth the extra cost?
Modular cables improve airflow and aesthetics by removing unused wires. For SFX builds where every inch matters this is highly recommended for easier cable management.
How do I know if a unit fits my case?
Check your case manual for PSU dimensions. SFX units generally fit ITX cases but verify exact measurements to ensure clearance for cables and brackets.
Final Thoughts on Choosing the Best 850W Sfx Power Supply
The Cooler Master V850 SFX Gold leads our list with excellent ATX 3.1 readiness and build quality. CORSAIR SF850 offers premium features for those seeking top performance.
For budget-conscious buyers the GAMEMAX SFX model provides strong protection and modern support at a lower cost. Consider your cooling needs and case type before buying.
Prices change frequently so verify current listings for any specific model before making your final decision. Choose the unit that aligns with your build goals today.