GAMEMAX SFX Power Supply 850W
4.2Editor score
80 Plus Gold Certified Efficiency
Full Modular Cabling System
ATX 3.0 Compliant Design
In this guide
Finding the right power supply for a compact build requires careful attention to wattage and form factor. The 850W Sfx Power Supply category offers high performance in a small footprint, ideal for gaming and professional workstations.
We evaluated ten leading models based on efficiency ratings, cable management, and compliance with modern standards like ATX 3.1. Our analysis highlights units that balance power delivery with silent operation and robust protection features.
Each pick demonstrates unique strengths for different builders and system requirements. Prices and availability fluctuate frequently, so check current listings before purchasing to ensure you get the best value for your specific build needs.
Top 3 Picks for Best 850W Sfx Power Supply
be quiet! Pure Power 13 M 850W
4.6Editor score
80 Plus Gold Rated Performance
Native 12V-2×6 Connector
Semi-Passive Zero RPM Cooling
CORSAIR SF850 (2024)
4.3Editor score
80 PLUS Platinum Rated Power
ATX 3.0 Compliant Standard
Japanese Capacitors for Reliability
Top 10 Best 850W Sfx Power Supply in 2026 Compared
The following table provides a side-by-side comparison of all ten selected power supplies. It highlights key specifications such as efficiency ratings, connector types, and warranty details to help you make an informed decision.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Cooler Master V850 SFX Gold
80 Plus Gold Certified
ATX 3.1 Ready
12VHPWR Connector Included
Enhanced Dissipation Design
4.4Editor score
Editor's Choice
CORSAIR SF850 (2024)
80 PLUS Platinum Rated
ATX 3.0 Compliant
Type-5 Micro-Fit Connectors
105°C Japanese Capacitors
4.3Editor score
Best Premium
Vetroo 850W Black SFX
80 Plus Gold Certified
ATX 3.1 Ready
Full Modular Design
PCIe 5.1 Supported
4.6Editor score
GAMEMAX SFX Power Supply 850W
80 Plus Gold Certified
APFC+LLC+DC-DC Design
Ultra Quiet FDB Fan
Heavy-Duty Protection
4.2Editor score
Lian Li SP0850P Platinum
80Plus Platinum Certified
Smart Cooling Fanless Mode
Flexible DC Cables
100% Japanese Capacitors
4.1Editor score
be quiet! Pure Power 13 M 850W
80 PLUS GOLD Certified
ATX 3.1 PSU Standard
Semi-Passive Cooling
LLC Topology Tech
4.6Editor score
Thermaltake Toughpower SFX 850W
80Plus Platinum Certified
ATX 3.1 Standard
Low Ripple Noise
7 Year Warranty
4.2Editor score
Super Flower Combat SFX FG 850W
Cybenetics Gold Certified
ATX 3.1 Compliant
Full Modular Design
Auto Voltage Detection
4.5Editor score
CORSAIR SF850 (2024) Renewed
80 PLUS Platinum Rated
ATX 3.0 Compliant
Fluid Dynamic Bearing Fan
Type-5 Micro-Fit Connectors
5.0Editor score
Lian Li SX0850P Platinum
80 Plus Platinum Certified
Smart Cooling Technology
Flexible Braided Cables
105°C Rated Capacitors
4.5Editor score
1. Cooler Master V850 SFX Gold – Best Overall 850W Sfx Power Supply
Cooler Master V850 SFX Gold
ATX 3.1 Ready
12VHPWR Connector
Enhanced Cooling System
Customized Cable Length
The Cooler Master V850 SFX Gold stands out as a leading choice for small form factor builds. With a rating of 4.4 stars, it delivers powerful performance in a mini design suitable for gamers and professionals.
Pros
- Mighty ITX Design
- ATX 3.1 Cables
- Enhanced Dissipation
- Durable Cables
- PCIe 5.1 Ready
Cons
- Extended cables needed for large cases
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It features a 90° durable 12VHPWR PCIe 5.1 connector for improved safety. The ATX 3.1 cables support up to 600W for your GPU. Enhanced dissipation ensures top performance and cooling during heavy workloads.
While the design is compact, users might need extended cables for larger cases. The customized cable length reduces clutter but requires planning. This trade-off is acceptable for the high power and compact size it offers.
If you need a powerful ITX power supply, this is a top recommendation. Its features make it ideal for high-end small PCs. Choose it for reliability and future-ready connectivity.
Future Ready Connectivity
The PCIe 5.1 readiness ensures your system supports the latest graphics cards without needing adapters.
Efficient Cooling Design
Integrated transformer and rectifier design ensures efficient heat management even in tight chassis.
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2. CORSAIR SF850 (2024) – Best Premium 850W Sfx Power Supply
CORSAIR SF850 (2024)
80 PLUS Platinum Rated
ATX 3.0 Compliant
Type-5 Micro-Fit Connectors
105°C Japanese Capacitors
The CORSAIR SF850 (2024) offers massive Platinum-rated power in a compact SFX form-factor. It is perfect for power-dense small-form-factor PCs or saving space in larger cases with high performance needs.
Pros
- Massive Platinum Power
- ATX 3.0 Compliant
- Fully Modular Cabling
- Low Noise Operation
- Japanese Capacitors
Cons
- Higher price point
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It is ATX 3.0 Compliant and PCIe 5.0 Ready, supporting the latest platform and resisting transient power spikes. The Type-5 Micro-Fit connectors allow for flexible cabling and tidy cable management in small cases.
The 92mm PWM cooling fan delivers powerful cooling with low noise. Japanese capacitors rated at 105°C ensure unwavering power and reliability over time. It is a premium choice for those who want the best.
For builders seeking top-tier quality and future-proofing, this unit is excellent. The cost is higher but justified by the features. Choose this for a quiet, reliable, and powerful SFX experience.
Quiet Operation
The fluid dynamic bearing fan ensures quiet operation even under load, ideal for silent builds.
Premium Components
Japanese capacitors provide superior stability and longevity for your system's power delivery.
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3. GAMEMAX SFX Power Supply 850W – Best Budget 850W Sfx Power Supply
GAMEMAX SFX Power Supply 850W
80 Plus Gold Certified
Full Modular Design
Ultra Quiet FDB Fan
ATX 3.0 Ready
The GAMEMAX SFX Power Supply 850W offers excellent value with 80 Plus Gold certification. It features a full modular design that makes cable management easier and helps maintain a tidy build.
Pros
- 80 Plus Gold Certified
- Full Modular Design
- Japanese Capacitors
- ATX 3.0 Ready
- Robust Protection
Cons
- 4 rating
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It uses Japanese 105°C capacitors and solid capacitors for quality and stability. The unit is ATX 3.0 and PCIe 5.0 ready, supporting power-hungry graphics cards up to 600W. An ultra-quiet FDB fan ensures low noise.
Robust protection against over-voltage and short-circuit ensures worry-free operation. While its rating is lower than some competitors, it offers great performance for the price. It is a reliable choice for budget-conscious builders.
If you need a dependable power supply without breaking the bank, this is a great pick. It meets modern standards and keeps costs down. Choose it for solid efficiency and protection features.
Cost Effective Performance
80 Plus Gold efficiency means lower power bills without sacrificing performance or features.
Safe Operation
Multiple protection systems keep your components safe from electrical issues and surges.
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4. Vetroo 850W Black SFX – Best Value 850W Sfx Power Supply
Vetroo 850W Black SFX
80 Plus Gold Certified
Full Modular Design
ATX 3.1 Ready
PCIe 5.1 Supported
The Vetroo 850W Black SFX is a strong contender with 80 Plus Gold certification. It is ATX 3.1 and PCIE 5.1 ready, making it a perfect choice for any PC builder or gamer looking for future-proof power.
Pros
- 80 Plus Gold Certified
- Full Modular Design
- ATX 3.1 Ready
- PCIe 5.1 Supported
- Compact SFX Size
Cons
- Limited brand reputation
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It features a full modular design allowing you to install only the cables you need. This reduces clutter significantly in tight spaces. The SFX size fits mini ITX chassis and expands to ATX with a bracket.
Support for PCIe Gen 5.1 improves performance and efficiency while remaining backward compatible with older standards. The efficiency rating ensures energy savings and reliable performance. It is a well-balanced option for many builds.
For those who want modern standards without a high price, this unit fits well. It offers excellent versatility and cabling management. Choose it for efficient and compact power delivery.
Compact Flexibility
The SFX size works for mini ITX but can expand to ATX with a bracket for versatility.
Next Gen Support
PCIe 5.1 support ensures you are ready for the latest graphics card innovations.
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5. Lian Li SP0850P Platinum – Best Silent 850W Sfx Power Supply
Lian Li SP0850P Platinum
80Plus Platinum Certified
Smart Cooling Fanless Mode
Flexible DC Cables
100% Japanese Capacitors
The Lian Li SP0850P Platinum delivers up to 92% efficiency with 80Plus Platinum certification. It is ideal for gamers and creators needing powerful performance in a compact form that measures 125mm wide.
Pros
- 80Plus Platinum Certified
- Smart Cooling Fanless Mode
- Flexible DC Cables
- 100% Japanese Capacitors
- Included SFX Bracket
Cons
- Fanless mode only at low load
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Smart Cooling activates fanless mode at ≤40% load for silent operation and extended fan life. The flexible DC cables simplify routing for a clean, clutter-free build. The included SFX-to-ATX bracket ensures versatile compatibility.
100% Japanese capacitors rated at 105°C provide superior durability and stable performance. While fanless mode is limited to low loads, the fan engages only when needed. This balance ensures quiet and efficient operation.
If silent operation is a priority, this unit is a great fit. The flexible cables and bracket add value to the build process. Choose it for quiet and reliable power in small cases.
Silent Operation
Fanless mode at low load ensures your PC stays quiet during light tasks.
Build Quality
Japanese capacitors and flexible cables ensure a durable and tidy installation experience.
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6. be quiet! Pure Power 13 M 850W – Best Efficient 850W Sfx Power Supply
be quiet! Pure Power 13 M 850W
80 PLUS GOLD Certified
ATX 3.1 PSU Standard
Semi-Passive Zero RPM Cooling
LLC Topology
The be quiet! Pure Power 13 M 850W is certified 80 PLUS Gold with up to 94.4% efficiency. It is an ATX 3.1 PSU with native integration of the 12V-2×6 connector for next-gen PCIe 5.1 graphics cards.
Pros
- 80 PLUS GOLD Certified
- ATX 3.1 PSU
- Semi-Passive Zero RPM Cooling
- Handles Power Excursions
- Native 12V-2×6 Connector
Cons
- Fan can spin at high load
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It offers 850W of continuous power with one massive 12V rail. It handles power excursions up to double its rated power with ease. The semi-passive Zero RPM cooling ensures exceptional silence in low-load scenarios.
The LLC topology provides best-in-class voltage regulation and efficiency. It is perfect for building very quiet systems or upgrading gaming and media creation PCs. A reliable choice for future proof power needs.
If you need a quiet and efficient power supply, this is an excellent choice. It supports the latest standards and ensures system stability. Choose it for clean and silent performance.
Voltage Stability
LLC topology ensures precise voltage regulation for safe component operation.
Low Noise Design
Zero RPM cooling mode eliminates noise during idle and light use periods.
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7. Thermaltake Toughpower SFX 850W – Best Endurance 850W Sfx Power Supply
Thermaltake Toughpower SFX 850W
80Plus Platinum Certified
Full Modular Cables
Low Ripple Noise
7 Year Warranty
The Thermaltake Toughpower SFX 850W is 80Plus Platinum certified compact power with limitless performance. It is PCIe Gen 5.1 ready and fully compatible with ATX 3.1 standards for future systems.
Pros
- 80Plus Platinum Certified
- ATX 3.1 Standards
- Full Modular Cables
- Low Ripple Noise
- 7 Year Warranty
Cons
- Price point higher
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Features include fully modular low-profile cables and low ripple noise under 30mV. Extremely strict voltage regulation and 17ms hold up time ensure system stability. A 7 Year Warranty adds peace of mind for buyers.
The 90mm FDB fan keeps temperatures controlled efficiently. While the price is higher, the warranty and performance justify the cost. It is designed for high-performance systems needing reliability.
If you want long-term reliability and modern standards, this is a strong pick. The warranty coverage is excellent for peace of mind. Choose it for consistent power and durability.
Power Stability
Low ripple noise ensures clean power delivery to your sensitive components.
Long Term Warranty
A 7 Year warranty shows confidence in the build quality and longevity.
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8. Super Flower Combat SFX FG 850W – Best Flexible 850W Sfx Power Supply
Super Flower Combat SFX FG 850W
Cybenetics Gold Certified
Full Modular Design
ATX 3.1 Compliant
Auto Voltage Detection
The Super Flower Combat SFX FG 850W features a full modular design with all ribbon cables to maximize flexibility. It is Cybenetics Gold Certified and compliant with ATX 3.1 standard for modern systems.
Pros
- Cybenetics Gold Certified
- Full Modular Design
- ATX 3.1 Compliant
- Modern Standby Compatible
- Ribbon Cables
Cons
- Ribbon cables may be too thin
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It is PCIe 5.1 ready to resist transient power spikes. The unit supports Modern Standby and features Full Range Auto Voltage Detection from 100V to 240V. This makes it versatile for different regions.
Ribbon cables improve airflow and reduce clutter in tight cases. While some may prefer thicker cables, this design helps with cable management. It is a solid choice for versatile and clean builds.
If you need a power supply that works globally and supports modern features, this is it. The ribbon cables are a distinct benefit for airflow. Choose it for flexible and efficient operation.
Global Voltage Support
Auto voltage detection ensures it works worldwide without manual switches.
Airflow Optimization
Flat ribbon cables allow better air movement inside your case.
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9. CORSAIR SF850 (2024) Renewed – Best Value Rebuild 850W Sfx Power Supply
CORSAIR SF850 (2024) Renewed
80 PLUS Platinum Rated
ATX 3.0 Compliant
Fluid Dynamic Bearing Fan
Type-5 Micro-Fit Connectors
The CORSAIR SF850 (2024) Renewed offers Platinum-rated power in a compact SFX form-factor. It is ATX 3.0 Compliant and PCIe 5.0 Ready, supporting the latest Gen 5 platform and resisting power spikes.
Pros
- 80 PLUS Platinum Rated
- ATX 3.0 Compliant
- Type-5 Micro-Fit Connectors
- 92mm PWM Fan
- Renewed Rating
Cons
- Renewed status may concern some
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It uses Type-5 Micro-Fit connectors for flexible cabling and space-saving in small cases. The 92mm PWM cooling fan provides low-noise operation thanks to a fluid dynamic bearing. Japanese capacitors ensure unwavering reliability.
A 5.0 rating reflects high customer satisfaction with this renewed unit. It includes the SFX-to-ATX bracket for versatile installation. The savings compared to new models make it an attractive option.
If you want a top-tier power supply at a better price, this is worth considering. The features match the new version. Choose it for premium performance with a value price.
Cost Savings
Renewed units offer high performance at a more accessible price point.
Same Core Features
Core performance matches the new model with standard warranty support.
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10. Lian Li SX0850P Platinum – Best Compact 850W Sfx Power Supply
Lian Li SX0850P Platinum
80 Plus Platinum Certified
Smart Cooling Technology
Flexible Braided Cables
105°C Rated Capacitors
The Lian Li SX0850P Platinum achieves up to 92% efficiency with 80 Plus Platinum certification. It features Smart Cooling Technology with fanless mode at ≤40% load for silent operation in quiet environments.
Pros
- 80 Plus Platinum Certified
- Smart Cooling Technology
- Flexible Braided Cables
- 105°C Rated Capacitors
- Ample Connectors
Cons
- Compact size limits cable length
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Flexible braided cables facilitate effortless cable management and reduce clutter. It has ample PCIe 6+2 connectors for multiple accessories. 100% Japanese 105°C-rated capacitors ensure exceptional durability under thermal stress.
The 120 mm FDB fan has a maximum speed of 2,000 RPM for cooling. It is designed for complex builds needing stable voltage regulation. This compact unit is ideal for small cases needing high power.
If you need a compact and efficient unit with flexible cables, this works well. The cooling tech ensures quiet low-load performance. Choose it for efficient and tidy power.
Efficient Operation
Platinum efficiency ensures less wasted energy and cooler system temperatures.
Cable Management
Flexible braided cables make routing easier in cramped builds.
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Buying Guide – How to Choose the Best 850W Sfx Power Supply
Selecting the right power supply involves checking several technical and practical factors. This guide walks you through the key elements to ensure you pick a unit that fits your system and budget.
Efficiency Rating
Efficiency ratings like 80 Plus Gold or Platinum indicate how much power is converted effectively. Higher efficiency reduces heat and electricity bills while ensuring stable power delivery to your components.
Look for at least Gold certification for good balance and Platinum for top performance.
Form Factor Compatibility
SFX power supplies are designed for small cases but can often fit in ATX cases with brackets. Always check if your case supports SFX and if a bracket is included or sold separately.
Ensure the power supply dimensions match your case specifications for a proper fit.
Cabling and Modularity
Fully modular designs allow you to use only necessary cables, reducing clutter and improving airflow. This is crucial in compact builds where space is limited.
Choose a fully modular unit for cleaner and more organized cable management.
Connector Types
Modern GPUs require PCIe 5.0 or 5.1 connectors such as 12VHPWR. Ensure your power supply has native support to avoid using adapters.
Check that the unit includes the required connectors for your GPU.
Protection Features
Reliable power supplies include protection against over-voltage, short-circuit, and over-temperature. These safeguards prevent damage to your components during electrical surges.
Prioritize units with comprehensive protection systems for safe operation.
Noise and Cooling
A quiet system requires a PSU with efficient cooling and low noise fans. Features like fanless modes at low loads can help maintain silence.
Look for models with fluid dynamic bearing fans and smart cooling technologies.
Warranty and Reliability
A longer warranty period indicates confidence in the product quality and durability. It also provides peace of mind for your investment.
Choose units with at least a seven-year warranty if possible.
Brand Reputation
Established brands often provide better support and quality control. Research customer reviews and ratings to ensure reliability.
Stick with reputable manufacturers for better long-term reliability.
How to Use and Care for Your 850W Sfx Power Supply
Install the power supply first by mounting it securely in the case. Ensure all screws are tightened to prevent vibration noise and movement.
Connect cables carefully matching colors and labels to the components. Start with the 24-pin and CPU connectors before moving to GPU and peripherals.
Regularly clean dust from the fan vents using compressed air. This maintains airflow and prevents overheating and damage to internal components.
Frequently Asked Questions
Is 850W enough for high-end gaming PCs?
Yes, 850W is sufficient for most high-end gaming PCs with top-tier GPUs and CPUs. It provides enough headroom for power spikes and future upgrades without needing a larger unit.
What is the difference between SFX and ATX power supplies?
SFX power supplies are smaller than ATX units designed for compact cases. They often require adapters to fit standard cases but offer the same power in a smaller form factor.
Do all SFX power supplies support ATX 3.1?
Not all, but many modern units do. Check the product specifications to confirm ATX 3.1 compliance if you need the latest connector standards.
How important is 80 Plus certification?
It is important for efficiency and heat management. Higher certifications mean less wasted energy and cooler operation which improves component lifespan.
Can I use an SFX PSU in an ATX case?
Yes, with an SFX-to-ATX mounting bracket. These brackets adapt the smaller unit to fit the larger mounting holes of standard ATX cases.
What are fully modular power supplies?
Fully modular units allow you to connect only the cables you need. This improves cable management and airflow compared to non-modular or semi-modular options.
Final Thoughts on Choosing the Best 850W Sfx Power Supply
Choosing the right 850W Sfx Power Supply depends on your specific build needs and budget. The units listed above offer excellent performance for small form factor systems.
Prioritize features like ATX 3.1 compatibility and efficiency ratings for future proofing. A reliable PSU ensures your system runs smoothly and safely.
Remember to check current prices and stock availability before purchasing. Prices can fluctuate so finding the best deal requires monitoring.