GAMEMAX SFX Power Supply 850W
4.2Editor score
80 Plus Gold certified
Full modular design
Robust protection suite
In this guide
Selecting the right power supply is critical for any small form factor build. You need a unit that delivers stable power without overheating or making excessive noise. The best 850W SFX power supply balances compact size with high wattage output.
We evaluated these models based on efficiency ratings, cable management, and compatibility with modern hardware. Our analysis focuses on units that support ATX 3.1 and PCIe 5.1 standards. This ensures your system handles next-generation graphics cards without issue.
Each pick highlights specific strengths like quiet operation or modular cabling. Prices and availability can change quickly so always verify details before buying. This guide helps you find the perfect power source for your compact gaming PC.
Top 3 Picks for Best 850W Sfx Power Supply
Cooler Master V850 SFX Gold
4.4Editor score
ATX 3.1 ready
90 degree durable cables
Enhanced heat dissipation
CORSAIR SF850 (2024)
4.3Editor score
80 PLUS Platinum rated
105C Japanese capacitors
92mm PWM cooling fan
Top 10 Best 850W Sfx Power Supply in 2026 Compared
The following table provides a side-by-side comparison of all ten top-rated units. We highlight key specifications like efficiency ratings, connector types, and cooling features to help you decide quickly.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Cooler Master V850 SFX Gold
80 PLUS Gold
ATX 3.1
Full Modular
SFX Form Factor
4.4Editor score
Editor's Choice
CORSAIR SF850 (2024)
80 PLUS Platinum
ATX 3.0
Type-5 Connectors
PWM Cooling Fan
4.3Editor score
Best Premium
Vetroo 850W Black SFX
80 PLUS Gold
ATX 3.1
Full Modular
SFX to ATX Bracket
4.6Editor score
GAMEMAX SFX Power Supply
80 PLUS Gold
ATX 3.0
12VHPWR Connector
FDB Fan
4.2Editor score
Lian Li SP0850P Platinum
80 PLUS Platinum
Fanless Mode
Japanese Capacitors
SFX to ATX Bracket
4.1Editor score
be quiet! Pure Power 13 M
80 PLUS Gold
ATX 3.1
Zero RPM Cooling
LLC Topology
4.6Editor score
Thermaltake Toughpower SFX
80 PLUS Platinum
ATX 3.1
Low Ripple Noise
7 Year Warranty
4.2Editor score
Super Flower Combat SFX FG
Cybenetics Gold
ATX 3.1
Full Modular
Active PFC
4.5Editor score
CORSAIR SF850 (2024) Renewed
80 PLUS Platinum
ATX 3.0
Type-5 Connectors
Japanese Capacitors
5.0Editor score
Lian Li SX0850P Platinum
80 PLUS Platinum
Smart Cooling
Flexible 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 Standard
90 Degree Cables
Amorphous Metal Design
600W GPU Power
The Cooler Master V850 SFX Gold stands out as a top choice for small form factor builds needing high power. With a solid 4.4 rating and PCIe 5.1 readiness it delivers robust performance for modern graphics cards. Its focus on durability and thermal management makes it a reliable pick.
Pros
- Supports latest PCIe 5.1
- Enhanced heat dissipation
- Durable 90 degree cables
- Customized cable lengths
- Strong performance reliability
Cons
- Premium price point
- Cables may need extension
We may earn a commission when you buy through this link, at no additional cost to you.
This unit features a unique transformer rectifier and LLC design paired with amorphous metal for improved efficiency. The 90 degree 12VHPWR connector ensures better electrical durability and safety compared to standard connectors. It can deliver up to 600W to your GPU supporting even the most power hungry systems.
While the performance is excellent the cables are customized which means you might need extensions for larger cases. The compact ITX design is powerful but requires careful planning to avoid clutter. These trade-offs are acceptable given the advanced tech and safety features included.
Gamers and professionals building ITX systems should consider this unit for its blend of power and safety. It is ideal for those wanting future proofing without sacrificing compact form. The enhanced dissipation ensures stable operation even under heavy loads.
Next Gen PCIe Support
The 90 degree 12VHPWR connector supports PCIe 5.1 allowing for safer and more efficient power delivery to latest GPUs.
Superior Thermal Design
Integrated design of transformer and rectifier with amorphous metal ensures top performance and cooling in a small package.
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
Type-5 Micro-Fit
105C Capacitors
The CORSAIR SF850 (2024) offers massive power in a compact SFX form factor ideal for power-dense PCs. Rated at 80 PLUS Platinum it ensures high efficiency and lower operating costs. Its fully modular design and low-noise fan make it a favorite for quiet builds.
Pros
- High Platinum efficiency
- Low noise operation
- Full modular design
- Fluid dynamic bearing fan
- Japanese capacitor quality
Cons
- Higher cost
- ATX 3.0 only
We may earn a commission when you buy through this link, at no additional cost to you.
It complies with ATX 3.0 and supports PCIe 5.0 platforms while resisting transient power spikes. The Type-5 Micro-Fit connectors take up less space aiding tidy cable management in tight cases. Japanese capacitors rated at 105C provide unwavering power reliability.
The main drawback is the higher price compared to other options in this category. It also supports ATX 3.0 rather than the newer 3.1 standard but remains highly capable. These factors are minor considering the build quality and performance stability.
This PSU is perfect for enthusiasts seeking a quiet reliable and efficient power source for small form factor systems. The 92mm PWM cooling fan delivers powerful cooling with minimal noise. It is a strong investment for long-term use.
Premium Efficiency
80 PLUS Platinum rating means up to 92% efficiency ensuring cooler quieter and more energy-efficient system operation.
Low Noise Cooling
The 92mm PWM cooling fan with fluid dynamic bearing delivers powerful cooling with low-noise operation.
We may earn a commission when you buy through this link, at no additional cost to you.
3. Vetroo 850W Black SFX – Top Value 850W Sfx Power Supply
Vetroo 850W Black SFX
80 PLUS Gold
ATX 3.1 Ready
Full Modular
SFX to ATX Bracket
The Vetroo 850W Black SFX has gained traction with a high 4.6 rating for its performance and features. It supports the latest ATX 3.1 and PCIe 5.1 standards making it a strong choice for future builds. Its full modular design helps reduce clutter significantly.
Pros
- High customer rating
- Supports PCIe 5.1
- Flexible sizing options
- Full modular design
- Competitive pricing
Cons
- Less known brand
- Cable quality varies
We may earn a commission when you buy through this link, at no additional cost to you.
This unit is compatible with mini ITX chassis and can expand to ATX size using the included bracket. The 80 Plus Gold certification ensures reliable performance and energy savings for your system. Backward compatibility with PCIe 4.0 and 3.0 adds versatility.
As a newer player in the market the brand may have less long term track record. The cables are manageable but users should check quality upon arrival. These issues are acceptable given the high rating and advanced features.
Gamers and builders looking for a balance of modern specs and price should consider this unit. It is ideal for those needing PCIe 5.1 support without breaking the bank. The modular cables simplify installation in compact cases.
Future Proof Connectivity
Supports latest PCIE 5.1 for improved performance and efficiency while remaining backward compatible with older standards.
Flexible Build Options
Suitable for mini ITX chassis but can expand to ATX size using included SFX-to-ATX bracket.
We may earn a commission when you buy through this link, at no additional cost to you.
4. GAMEMAX SFX Power Supply – Best Budget 850W Sfx Power Supply
GAMEMAX SFX Power Supply
80 PLUS Gold
ATX 3.0 Ready
12VHPWR Connector
Japanese Capacitors
The GAMEMAX SFX Power Supply 850W offers excellent value for those needing a compact high-wattage unit. With an 80 Plus Gold certification it meets high standards of efficiency. Its full modular design allows for neat cable management in small cases.
Pros
- Affordable price
- Full modular design
- Robust protection
- Japanese components
- Quiet fan operation
Cons
- Basic aesthetic
- Cable length limits
We may earn a commission when you buy through this link, at no additional cost to you.
It comes with a 12VHPWR 16pin connector to provide up to 600W for graphics cards. The main Japanese 105C capacitors aim for unwavering product quality and performance stability over time. Heavy-duty protection against over-voltage and short-circuit issues ensures safety.
The unit focuses on function over form which might appeal to pragmatic builders. While cable lengths are standard some users might need extensions for larger builds. These compromises are minor for the price point.
Budget-conscious gamers can rely on this PSU for stable power without overspending. It suits those who prioritize safety features and modular convenience. The ultra quiet FDB fan ensures low noise during typical use.
Comprehensive Protection
Heavy-duty protection against over-voltage under-voltage over-power short-circuit over-current and over-temperature issues.
High Quality Components
Main Japanese 105C capacitors and solid capacitors ensure quality and performance stability.
We may earn a commission when you buy through this link, at no additional cost to you.
5. Lian Li SP0850P Platinum – Top Silenced 850W Sfx Power Supply
Lian Li SP0850P Platinum
80 PLUS Platinum
Fanless Mode
Flexible DC Cables
SFX to ATX Bracket
The Lian Li SP0850P Platinum is engineered for high performance and silent operation. It features a fanless mode that activates at 40 percent load for quiet operation and extended fan life. This makes it ideal for users who prioritize noise reduction.
Pros
- Smart cooling mode
- Flexible DC cables
- Platinum efficiency
- Japanese capacitors
- Versatile bracket
Cons
- Moderate rating
- Size slightly larger
We may earn a commission when you buy through this link, at no additional cost to you.
Super flexible DC cables simplify routing for a clean clutter-free build and improved airflow. The included SFX-to-ATX bracket allows seamless installation in both compact SFX and standard ATX cases. 100 percent Japanese capacitors provide superior durability.
The fanless mode is a major benefit but it depends on load conditions to stay silent. Some users may find the design slightly larger than typical SFX units. These details are manageable given the cooling benefits.
Creators and gamers seeking quiet operation should find this unit appealing. The 92% efficiency ensures a cooler and more energy-efficient system. It is a strong choice for premium builds.
Smart Cooling
Fanless mode activates at 40% load for silent operation and extended fan life engaging the fan only when needed.
Flexible Cabling
Super flexible DC cables simplify cable routing for a clean clutter-free build and improved airflow.
We may earn a commission when you buy through this link, at no additional cost to you.
6. be quiet! Pure Power 13 M – Top Efficient 850W Sfx Power Supply
be quiet! Pure Power 13 M
80 PLUS Gold
ATX 3.1 Standard
Zero RPM Cooling
LLC Topology
The be quiet! Pure Power 13 M 850W is an excellent choice for quiet systems and gaming PCs. Certified 80 PLUS Gold it delivers up to 94.4 percent efficiency lowering power consumption and costs. It is always the correct choice for quiet systems.
Pros
- High efficiency rating
- ATX 3.1 ready
- Zero RPM cooling
- Single 12V rail
- Quiet operation
Cons
- Higher cost
- Cable management
We may earn a commission when you buy through this link, at no additional cost to you.
This PSU features an ATX 3.1 standard with native integration of the 12V-2×6 connector for next-gen GPUs. It handles power excursions up to double its rated power with ease ensuring reliable operation. Semi-passive zero-RPM cooling keeps it silent under low loads.
The 12V rail is massive providing ample power for demanding processors and graphics cards. Users must manage cables carefully though the design is fully modular. These trade-offs are acceptable given the performance.
Anyone building a very quiet system or upgrading a gaming PC should consider this unit. Its LLC topology provides best-in-class voltage regulation and efficiency. It is versatile for today and future systems.
Efficiency Rating
80 PLUS Gold certified with an outstanding efficiency rating of up to 94.4 percent for lower power consumption.
Zero RPM Cooling
Semi-passive zero-RPM cooling turns the fan off completely until its services are needed again.
We may earn a commission when you buy through this link, at no additional cost to you.
7. Thermaltake Toughpower SFX – Top Reliable 850W Sfx Power Supply
Thermaltake Toughpower SFX
80 PLUS Platinum
ATX 3.1 Standard
Low Ripple Noise
7 Year Warranty
The Thermaltake Toughpower SFX 850W is a compact power unit with limitless performance. It is 80Plus Platinum certified for high efficiency and low ripple noise below 30mV. The ATX 3.1 standard ensures compatibility with modern components.
Pros
- Platinum certified
- Low ripple noise
- ATX 3.1 standard
- Full modular cables
- Strong warranty
Cons
- Fan noise
- Cable length
We may earn a commission when you buy through this link, at no additional cost to you.
Fully modular low-profile cables help manage space in tight cases. It features extremely strict voltage regulation below plus or minus two percent for stability. A 7 year warranty offers peace of mind for long-term reliability.
The fan is small but may produce some noise under high loads. Cable lengths might require planning for larger ATX builds. These issues are minor given the technical specs.
This PSU suits those needing a reliable and efficient power source for small form factor builds. It handles power excursions well. The low ripple noise ensures clean power delivery.
Low Ripple Noise
Less than 30mV low ripple noise ensures extremely strict voltage regulation and clean power delivery.
Warranty Support
Comes with a comprehensive 7 year warranty providing long-term protection for your investment.
We may earn a commission when you buy through this link, at no additional cost to you.
8. Super Flower Combat SFX FG – Top Modular 850W Sfx Power Supply
Super Flower Combat SFX FG
Cybenetics Gold
ATX 3.1 Standard
Full Modular
Auto Voltage Detection
The Super Flower Combat SFX FG 850W Power Supply features a full modular design with ribbon cables. It is compliant with the ATX 3.1 standard and ready for PCIe 5.1. The Cybenetics Gold certification ensures efficiency and reliability.
Pros
- Full modular design
- Cybenetics Gold
- ATX 3.1 ready
- Modern standby
- Global voltage
Cons
- Price fluctuation
- Cable thickness
We may earn a commission when you buy through this link, at no additional cost to you.
Modern standby compatibility adds convenience for low power states. Full Range Auto Voltage Detection Design supports 100V to 240V for global use. This flexibility makes it suitable for international travelers.
The ribbon cables maximize flexibility and space management but may feel different to some users. Price changes might occur but the features remain solid. These are acceptable trade-offs.
This unit is a strong option for those needing versatile voltage support and modern standards. It helps resist transient power spikes effectively. The modular design aids in tidy builds.
Modern Standby
Modern standby compatible design allows for quick wake times and low power states.
Voltage Detection
Full Range Auto Voltage Detection supports 100V to 240V for seamless global use.
We may earn a commission when you buy through this link, at no additional cost to you.
9. CORSAIR SF850 (2024) Renewed – Top Eco 850W Sfx Power Supply
CORSAIR SF850 (2024) Renewed
80 PLUS Platinum
ATX 3.0 Ready
Type-5 Connectors
92mm PWM Fan
The CORSAIR SF850 (2024) Renewed offers a sustainable option with a perfect 5.0 rating. It is fully modular and low noise with an 80 PLUS Platinum certification. The ATX 3.0 compliant design supports PCIe 5.0 platforms effectively.
Pros
- Renewed sustainability
- Perfect rating
- Platinum efficiency
- Low noise fan
- Japanese capacitors
Cons
- Limited availability
- Short warranty
We may earn a commission when you buy through this link, at no additional cost to you.
Type-5 Micro-Fit PSU connectors take up less space for tidy cable management. The 92mm PWM cooling fan delivers powerful cooling with low-noise operation. Japanese capacitors rated at 105C ensure unwavering reliability.
The renewed status means potential limited availability and shorter warranty periods. However the perfect rating suggests high customer satisfaction. These factors are minor for eco-conscious buyers.
This unit is great for those seeking high performance at a sustainable value. It is ideal for saving space in larger cases or powering dense SFF PCs. The reliability is consistent with new models.
Renewed Quality
Renewed status offers sustainability without sacrificing performance or reliability.
Platinum Rating
80 PLUS Platinum rating delivers massive power in a compact SFX form-factor.
We may earn a commission when you buy through this link, at no additional cost to you.
10. Lian Li SX0850P Platinum – Top Compact 850W Sfx Power Supply
Lian Li SX0850P Platinum
80 PLUS Platinum
Smart Cooling
Flexible Braided Cables
120mm FDB Fan
The Lian Li SX0850P Platinum achieves up to 92 percent efficiency at 50 percent load. It features smart cooling technology with a fanless mode at 40 percent load for silent operation. Flexible braided cables facilitate effortless cable management.
Pros
- Platinum efficiency
- Smart cooling tech
- Flexible braided cables
- Multiple connectors
- Strong support
Cons
- Fan noise at max
- Price premium
We may earn a commission when you buy through this link, at no additional cost to you.
Ample PCIe 6+2 connectors allow powering multiple accessories without limitations. Built with 100 percent Japanese 105C-rated capacitors it ensures durability under high thermal stress. RMA support is available for quick resolution of missing parts.
The fan speed reaches 2000 RPM which might be audible at max load. Price is a consideration given the features. These details are acceptable for high performance.
This PSU suits gamers and creators needing versatile setups and quiet operation. It ensures cooler and more energy-efficient operation. The support team is responsive to issues.
Smart Cooling
Fanless mode at 40% load offers silent operation while maintaining optimal temperatures during high loads.
Ample Connectors
Easily power multiple accessories including USB and fan hubs ensuring a versatile setup.
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
Choosing the right 850W SFX power supply requires evaluating several factors to ensure compatibility and reliability for your build.
Power Efficiency Ratings
Efficiency ratings like 80 PLUS Gold or Platinum indicate how much energy is converted to power. Higher ratings mean less heat and lower electricity costs. Always choose a unit with at least Gold certification for efficiency.
ATX and PCIe Standards
Modern GPUs often require ATX 3.1 and PCIe 5.1 support for stable power. Look for units that mention these standards to avoid bottlenecks. This ensures your hardware is ready for future upgrades.
Modular Cabling
A modular design allows you to use only the cables you need. This reduces clutter inside small form factor cases improving airflow and aesthetics. Full modular units are generally preferred for SFX builds.
Cooling and Noise
Small cases can trap heat so effective cooling is vital. Fans with fluid dynamic bearings run quieter and last longer. Some units offer fanless modes for silent operation under low loads.
Warranty and Support
A longer warranty period indicates manufacturer confidence in product quality. Look for at least 3 years of coverage to protect your investment. Good support channels help resolve any issues quickly.
Size and Compatibility
SFX units come in different sizes and some include brackets for ATX cases. Measure your case dimensions to ensure the PSU fits properly. Check connector lengths to avoid cable stretching or clutter.
Component Quality
Look for Japanese capacitors and solid components for better reliability. These parts withstand higher temperatures and provide stable power delivery. They are essential for protecting sensitive electronics.
Protection Features
Protection against over-voltage and short-circuit ensures system safety. Robust units include multiple layers of protection to prevent damage. This is crucial for high-end gaming or workstations.
How to Use and Care for Your 850W Sfx Power Supply
Start by planning your cable management before installing the power supply. Use modular cables to connect only what you need and route them neatly. This ensures better airflow and a cleaner build inside the case.
Ensure the PSU is secure and screws are tight to prevent vibration or noise. Check that all connectors are fully seated to avoid electrical issues. Test the system after installation to confirm stable operation.
Dust accumulation can reduce cooling efficiency so clean the fan regularly. Use compressed air to remove debris without damaging the components. Periodic checks help maintain optimal performance over time.
Frequently Asked Questions
Is an 850W SFX power supply enough for gaming?
Yes an 850W unit provides ample power for high-end graphics cards in small form factor builds. It ensures stable performance even under heavy gaming loads. Check your system requirements before finalizing your choice.
What is the difference between ATX 3.0 and 3.1?
ATX 3.1 builds on 3.0 with updated connectors and higher power capabilities. It supports next-gen GPUs with 12VHPWR connectors more effectively. Choose a unit with 3.1 support for future proofing.
Are SFX PSUs quieter than ATX units?
Not necessarily as SFX units rely on smaller fans which may spin faster. Look for units with fluid dynamic bearings and low-noise claims to ensure quiet operation. Fanless modes help reduce noise significantly.
Can I use an SFX PSU in a large case?
Yes many SFX PSUs come with brackets to fit standard ATX slots. This helps reduce cable clutter and allows better airflow in larger cases. Ensure the bracket is included before buying.
What efficiency rating should I aim for?
Aim for at least 80 PLUS Gold to balance cost and efficiency. Higher ratings like Platinum offer better energy savings and heat reduction. This choice helps lower electricity bills over time.
Do I need a modular power supply for SFX?
Modular PSUs help reduce clutter in tight small form factor cases. They allow you to connect only the cables you need improving airflow. It is highly recommended for compact builds.
How do I ensure my PSU is compatible?
Check your case specifications for PSU size limits and required connectors. Verify the unit supports your GPU and CPU requirements. Comparing dimensions and connectors avoids fit issues during installation.
What warranty is typical for SFX PSUs?
Most units offer between 3 to 7 years of warranty. Higher end models often come with longer coverage to reflect quality. Look for brands with strong support policies.
Final Thoughts on Choosing the Best 850W Sfx Power Supply
We reviewed the top 10 units including the Cooler Master V850 and CORSAIR SF850. Each offers unique strengths for small form factor builds and gaming needs.
Prioritize efficiency and ATX 3.1 support to future proof your system. Modular cabling and quiet operation are key features to consider for a clean and peaceful build.
Prices and availability change so always check current deals before buying. This guide helps you make an informed choice for reliable power.