GAMEMAX SFX Power Supply 850W
4.2Editor score
80 Plus Gold Certified
Fully Modular Design
Robust Protection Features
In this guide
Choosing the right power supply for a small form factor build is critical for stability and efficiency. The 850W SFX category delivers high wattage in a compact design suitable for ITX cases.
We evaluated ten leading models based on efficiency ratings, cable management, cooling performance, and modern standard compliance. Our analysis focuses on reliability and features that matter to builders.
Each pick highlights specific strengths like modular cabling, quiet operation, or premium certifications. Please note that product availability and pricing may change frequently over time.
Top 3 Picks for Best 850W Sfx Power Supply
Cooler Master V850 SFX Gold
4.4Editor score
90 Degree Durable Cables
ATX 3.1 Compliant
Enhanced Heat Dissipation
Lian Li SP0850P Platinum
4.1Editor score
Smart Fanless Cooling Mode
Super Flexible Cables
100 Percent Japanese Caps
Top 10 Best 850W Sfx Power Supply in 2026 Compared
The following table provides a side-by-side comparison of key specifications across all ten selected power supplies to help you quickly identify the best fit for your specific case and hardware needs.
ProductsSpecificationsEditor scorePrice
Editor's Choice
Cooler Master V850 SFX Gold
80 Plus Gold Rated
ATX 3.1 Ready
PCIe 5.1 Connector
Customized Cable Length
4.4Editor score
Editor's Choice
CORSAIR SF850 (2024)
80 Plus Platinum Rated
ATX 3.0 Compliant
92mm PWM Fan
Japanese Capacitors
4.3Editor score
Best Premium
Vetroo 850W Black SFX
80 Plus Gold Rated
ATX 3.1 Ready
PCIe 5.1 Ready
Full Modular Design
4.6Editor score
GAMEMAX SFX Power Supply 850W
80 Plus Gold Certified
ATX 3.0 Ready
Full Modular Cabling
Ultra Quiet FDB Fan
4.2Editor score
Lian Li SP0850P Platinum
80 Plus Platinum Rated
Smart Cooling Mode
SFX to ATX Bracket
Flexible DC Cables
4.1Editor score
be quiet! Pure Power 13 M
80 Plus Gold Rated
ATX 3.1 Standard
Semi Passive Cooling
LLC Topology
4.6Editor score
Thermaltake Toughpower SFX 850W
80 Plus Platinum Rated
ATX 3.1 Standard
Full Modular Cabling
Low Ripple Noise
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
92mm PWM Fan
SFX to ATX Bracket
5.0Editor score
Lian Li SX0850P Platinum
80 Plus Platinum Rated
ATX 3.1 Compliant
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
80 Plus Gold Certified
ATX 3.1 Cables
PCIe 5.1 Ready
Mighty ITX Design
The Cooler Master V850 SFX Gold stands out as a leading choice for small form factor builds requiring significant power. With a 4.4 rating, it is recognized for its mighty ITX design that delivers high performance in a compact chassis.
Pros
- Compact and powerful design
- Durable 90 degree cables
- Strong ATX 3.1 support
- Excellent heat dissipation
- Custom cable lengths included
Cons
- Slightly higher price point
- Limited color options
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Its standout features include 90 degree durable cables and ATX 3.1 compliance, ensuring it can handle the latest PCIe 5.1 GPUs efficiently. The internal design enhances dissipation through integrated components that maintain stable temperatures under load.
While the pricing is competitive, users should note that extended cables may be needed for larger cases. The customized cable lengths are generally sufficient for standard SFX layouts but might limit flexibility in specific custom water cooling setups.
This power supply is ideal for gamers and professionals building high-performance ITX systems. Its combination of modern standards and durable construction makes it a top recommendation for anyone prioritizing reliability and future-proofing.
Modern ATX 3.1 Integration
Support for ATX 3.1 ensures the power supply can deliver up to 600W to graphics cards, handling transient spikes with ease.
Enhanced Thermal Management
The integrated transformer and rectifier design improves cooling efficiency, keeping the unit quiet even during demanding tasks.
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2. CORSAIR SF850 (2024) – Best Premium Compact Build
CORSAIR SF850 (2024)
80 Plus Platinum Rated
Fully Modular Cables
ATX 3.0 Compliant
Japanese Capacitors
The CORSAIR SF850 (2024) offers massive Platinum-rated power in a compact SFX form-factor. It is designed for power-dense small-form-factor PCs and is compliant with the ATX 3.0 power standard from Intel.
Pros
- High efficiency Platinum rating
- Low noise PWM cooling fan
- Flexible modular cabling
- ATX 3.0 support
- Durable Japanese components
Cons
- Premium pricing may be high
- Fan size may limit airflow
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Its fully modular design with Type-5 Micro-Fit PSU connectors allows for tidy cable management, which is crucial in small cases. The 92mm PWM cooling fan provides effective cooling while maintaining low noise operation.
Japanese capacitors rated at 105°C ensure unwavering power and reliability over time. However, the premium price point might be a consideration for budget-conscious builders looking for a similar wattage option.
This PSU is perfect for enthusiasts who need high quality and silence in a small footprint. It balances performance and acoustics well, making it a strong choice for premium ITX builds.
Efficiency and Silence
The 80 PLUS Platinum rating ensures high efficiency and reduced heat, contributing to quieter system operation overall.
Future Ready Compliance
Compliance with ATX 3.0 means the unit is ready for next-gen platforms and can resist transient power spikes effectively.
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3. Vetroo 850W Black SFX – Excellent Value Choice
Vetroo 850W Black SFX
80 Plus Gold Certification
ATX 3.1 Ready
Full Modular Design
PCIe 5.1 Support
The Vetroo 850W Black SFX Power Supply has gained attention for its high rating and comprehensive feature set. It is compatible with SFX and ATX sizes when using an included bracket, offering great versatility.
Pros
- High customer rating
- Affordable price point
- ATX 3.1 Ready
- Full modular design
- Flexible cable routing
Cons
- Brand reputation varies
- Cable quality could vary
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It supports PCIe Gen 5.1 and is ready for ATX 3.1, making it a future-proof option for modern builds. The 80 Plus Gold certification ensures reliable performance and energy savings for daily users.
While it offers full modular design to reduce clutter, buyers should verify cable quality upon arrival as with many value options. The flexibility and compatibility make it a strong contender for budget-conscious gamers.
This unit is a great option for those building small-form-factor PCs who want modern standards without a premium price tag. It balances cost and features effectively for a wide range of users.
Versatile Form Factor Support
Designed to fit both SFX and ATX chassis with a bracket, this PSU maximizes flexibility for different case sizes.
Advanced Power Standards
ATX 3.1 readiness means you are prepared for the latest hardware requirements and power delivery standards.
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4. GAMEMAX SFX Power Supply 850W – Best Budget Option
GAMEMAX SFX Power Supply 850W
80 Plus Gold Certified
Full Modular PSU
ATX 3.0 Ready
Robust Protection Suite
The GAMEMAX SFX Power Supply 850W is an excellent choice for budget builds that still need high quality. It features 80 Plus Gold certification and an APFC+LLC+DC-DC design for efficiency.
Pros
- Affordable pricing
- Full modular cabling
- Strong protection features
- Quiet fan operation
- Japanese capacitors
Cons
- Fewer premium features
- Limited color choices
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Its robust protection suite covers over-voltage and short-circuit issues, ensuring worry-free operation. The ultra quiet FDB fan helps maintain low noise levels during normal gaming sessions.
While it is a budget model, it includes Japanese 105°C capacitors for better durability. Users may find the design simpler than higher-end models but still highly functional for standard cases.
This power supply is ideal for entry-level SFX builds where cost is a major factor. It provides reliable power and protection without breaking the bank, making it a smart pick for value shoppers.
Efficiency and Protection
The 80 Plus Gold certification and comprehensive protection features ensure safe and efficient power delivery for all components.
Quiet Operation
The ultra quiet FDB fan provides high performance heat dissipation while keeping noise to a minimum for a peaceful workspace.
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5. Lian Li SP0850P Platinum – Best Smart Cooling
Lian Li SP0850P Platinum
80 Plus Platinum Certified
Smart Cooling Mode
Flexible Cables
Japanese Capacitors
The Lian Li SP0850P Platinum is designed for silent operation with its smart cooling technology that activates a fanless mode at 40 percent load. This is ideal for quiet office or media center builds.
Pros
- Fanless mode at low load
- Super flexible DC cables
- 80 Plus Platinum efficiency
- SFX to ATX bracket
- Premium Japanese components
Cons
- Moderate rating score
- Fan noise at high load
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Its super flexible DC cables simplify routing, helping to achieve a clean build with improved airflow. The included bracket allows seamless installation in both compact SFX and standard ATX cases.
While the rating is lower than some competitors, the 80 Plus Platinum certification ensures high efficiency. The premium build quality matches the reputation of Lian Li for aesthetics and performance.
This unit is perfect for users who prioritize silence and cable management in their small form factor systems. It delivers stable power and excellent noise control for daily productivity and gaming.
Silent Operation Features
Fanless mode at low loads reduces noise significantly, making it perfect for quiet environments and media setups.
Premium Cable Design
Super flexible cables are easy to manage and route, contributing to a cleaner and more organized internal build.
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6. be quiet! Pure Power 13 M – Best Noise Control
be quiet! Pure Power 13 M
80 Plus Gold Certified
ATX 3.1 Standard
Semi-Passive Cooling
LLC Topology
The be quiet! Pure Power 13 M is renowned for its exceptional silence and high efficiency. It meets the 80 PLUS Gold standard with an efficiency rating of up to 94.4 percent for reduced power consumption.
Pros
- Very low noise levels
- High efficiency rating
- Semi-passive cooling
- 12V rail capacity
- Future-proof connections
Cons
- Single rail limitations
- Limited availability sometimes
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It supports the latest PCIe 5.1 graphics cards with native 12V-2×6 connectors. The semi-passive zero-rpm cooling ensures the fan remains off during low loads for a silent experience.
This unit provides 850W of continuous power with one massive 12V rail. It can handle power excursions up to double its rated power, ensuring reliable operation with next-gen processors.
Ideal for those seeking a quiet system, this PSU combines advanced topology with effective cooling. It is a perfect choice for upgrading gaming or media creation PCs without adding noise.
Advanced Power Delivery
The single massive 12V rail ensures stable power distribution, essential for high performance hardware in tight spaces.
Zero RPM Functionality
Semi-passive cooling keeps the system silent during light tasks, engaging fans only when absolutely necessary for cooling.
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7. Thermaltake Toughpower SFX 850W – Best Warranty
Thermaltake Toughpower SFX 850W
80 Plus Platinum Certified
ATX 3.1 Standard
Low Ripple Noise
7 Year Warranty
The Thermaltake Toughpower SFX 850W offers high performance with a robust 7 year warranty. It is certified 80 Plus Platinum and ready for PCIe Gen 5.1 with full ATX 3.1 compliance.
Pros
- Long warranty period
- Platinum efficiency
- Low ripple noise
- Full modular design
- Strict voltage regulation
Cons
- Slightly higher cost
- Fan size is small
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Its voltage regulation is extremely strict with low ripple noise, ensuring clean power for sensitive components. The full modular low-profile cables help maintain a tidy build inside small cases.
The 90mm FDB fan provides effective cooling in a compact chassis. While the fan size is limited, the internal design manages heat well for high load operations.
This PSU is an excellent choice for those who value reliability and warranty support. It delivers stable power and future-proof standards for serious builders and gamers.
Premium Protection
Strict voltage regulation and low ripple ensure that your components receive clean and stable power for long-term reliability.
Long Term Support
The 7 year warranty provides peace of mind, reflecting the manufacturer's confidence in the durability of this unit.
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8. Super Flower Combat SFX FG 850W – Best Value Features
Super Flower Combat SFX FG 850W
Cybenetics Gold Certified
ATX 3.1 Compliant
Full Modular Design
Auto Voltage Detection
The Super Flower Combat SFX FG 850W offers a full modular design with ribbon cables to maximize flexibility in tight spaces. It is compliant with ATX 3.1 and resists transient power spikes.
Pros
- Full modular with ribbon cables
- Cybenetics Gold certified
- Modern Standby Compatible
- Auto Voltage detection
- Compliance with ATX 3.1
Cons
- Less known brand
- Cable management nuances
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Cybenetics Gold certification highlights its efficiency and quality standards. Modern Standby compatibility ensures smooth sleep and wake functions for your system.
Auto Voltage detection design works across a wide range of voltages, making it versatile for international travel. This makes it a strong option for builders who need reliable and safe power.
This PSU is ideal for those who want flexible cabling and solid standards without premium pricing. It delivers stable performance and modern features suitable for current hardware.
Flexible Ribbon Cabling
The full modular design with ribbon cables helps reduce clutter and improves airflow in compact SFX cases.
Voltage Adaptability
Auto voltage detection supports a wide input range, ensuring safe operation regardless of regional power supply differences.
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9. CORSAIR SF850 (2024) Renewed – Best Renewed Option
CORSAIR SF850 (2024) Renewed
80 Plus Platinum Rated
Fully Modular Design
ATX 3.0 Compliant
92mm PWM Fan
This CORSAIR SF850 (2024) Renewed unit provides the benefits of a high-end Platinum PSU at a more accessible price point. It features a perfect 5.0 rating from customers who appreciate its reliability and performance.
Pros
- Renewed value pricing
- High customer rating
- Platinum efficiency
- Flexible modular cables
- SFX to ATX bracket
Cons
- Renewed product risks
- Warranty may differ
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It supports ATX 3.0 and PCIe 5.0 platforms, making it compatible with the latest graphics cards. The fully modular Type-5 Micro-Fit connectors help keep cable management tidy in small cases.
While it is a renewed product, the inclusion of the SFX-to-ATX bracket adds significant value for versatile installations. Customers can trust the robust build quality typical of CORSAIR products.
This option is ideal for budget-conscious buyers who still want a proven premium power supply. It offers a balance of efficiency and compatibility for compact builds.
Cost Effective Choice
The renewed option provides a reliable way to get high-end specs like Platinum efficiency without the full retail cost.
Versatility
Included SFX-to-ATX bracket means you can use this PSU in a wider range of cases without additional purchases.
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10. Lian Li SX0850P Platinum – Best Compact ATX
Lian Li SX0850P Platinum
80 Plus Platinum Certified
Smart Cooling Technology
Flexible Braided Cables
100 Percent Japanese Caps
The Lian Li SX0850P Platinum combines high efficiency with smart cooling technology that supports silent fanless operation at low loads. It features flexible braided cables that make installation easier in tight spaces.
Pros
- Smart fanless cooling mode
- Flexible braided cables
- High efficiency rating
- 105°C rated capacitors
- RMA support available
Cons
- ATX form factor size
- Fan speed at load
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It achieves up to 92 percent efficiency at 50 percent load, ensuring cooler and quieter operation. The 100 percent Japanese 105°C-rated capacitors provide exceptional durability even under high thermal stress.
This unit includes ample PCIe 6+2 connectors for multiple accessories, ensuring versatile setup without limitations. The RMA support offers quick resolution for any missing parts or cable color issues.
Ideal for those who want a premium compact ATX PSU, it balances silence and performance. It is a solid choice for high-end builds prioritizing noise control and cable management.
Efficient Power Delivery
High efficiency and quality capacitors ensure stable voltage and lower heat output for better system longevity.
Easy Setup
Flexible cables and ample connectors simplify installation, helping to maintain a clean and organized build.
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Buying Guide – How to Choose the Best 850W Sfx Power Supply
Selecting the right power supply involves considering form factor, efficiency, and modern standards to ensure your build is reliable and future-ready.
Form Factor Compatibility
Ensure the PSU matches your case specifications. SFX units are smaller and fit ITX cases, while some include brackets to fit ATX cases with flexibility.
Check the case manual to confirm SFX compatibility before purchasing to avoid fitting issues during assembly.
Efficiency Ratings
Look for 80 Plus Gold or Platinum certifications to ensure high energy efficiency. This reduces heat and electricity costs over time.
Higher efficiency ratings mean less wasted energy and a cooler system environment for your components.
Modern Standards Compliance
Verify support for ATX 3.1 and PCIe 5.1 if you plan to use the latest graphics cards. This ensures your PSU can handle modern power requirements.
Compliance with these standards protects your system from power spikes and improves stability.
Modular Design
Fully modular units allow you to connect only necessary cables, reducing clutter in tight spaces. This improves airflow and makes management easier.
Modular designs are especially beneficial in compact builds where space is limited.
Cooling and Noise
Consider fan size and type. Larger fans often move air more quietly, and smart cooling modes reduce noise during light loads.
Semi-passive or zero-rpm fans are ideal if silence is a priority for your workspace.
Build Quality
Check for Japanese capacitors and robust protection circuits. These ensure long-term reliability and safety against electrical faults.
High-quality components reduce the risk of failure and protect expensive hardware.
Warranty and Support
Look for extended warranties and reliable customer support. A longer warranty period indicates manufacturer confidence in product durability.
Strong support ensures you can resolve any issues quickly if they arise during the product life.
Cable Management
Flexible cables make routing easier and improve airflow. Some brands offer custom lengths that reduce excess clutter in small cases.
Proper cable management helps maintain a clean look and efficient cooling in your build.
How to Use and Care for Your 850W Sfx Power Supply
Install the PSU in a dry, cool environment to avoid dust accumulation. Ensure the fan intake is unobstructed to allow for proper airflow during operation.
Regularly clean the vents and fan using compressed air to prevent dust buildup. This maintains efficient cooling and extends the lifespan of the unit.
Avoid overloading the power supply by checking your total system wattage needs. Proper load management ensures stable performance and reduces strain on the components.
Frequently Asked Questions
What is the main advantage of an 850W SFX power supply?
The main advantage is that it delivers high wattage in a compact form factor suitable for small ITX cases. This allows for powerful gaming systems without taking up much space.
Are ATX 3.1 power supplies necessary for current builds?
They are highly recommended for future-proofing, especially if you plan to upgrade to next-gen GPUs. They provide better transient spike protection and support for modern hardware standards.
Can I use an SFX power supply in an ATX case?
Yes, many SFX power supplies include or support an adapter bracket. This allows them to be mounted in standard ATX cases without modification.
Why are modular cables important for SFX builds?
Modular cables reduce clutter by letting you connect only what you need. In tight cases, this improves airflow and makes cable routing much simpler.
How do I know if a power supply is quiet?
Look for models with PWM fans and semi-passive cooling modes. These designs allow the fan to stop spinning at low loads, reducing noise significantly.
What does 80 Plus Platinum mean?
It indicates the power supply meets high efficiency standards. This means less energy is wasted as heat, resulting in lower electricity costs and a cooler system.
Are Japanese capacitors better than others?
Japanese capacitors generally offer better durability and reliability over time. They are rated for higher temperatures, which contributes to a longer lifespan.
How important is the warranty for a power supply?
It is very important as it reflects the build quality and manufacturer confidence. A long warranty gives you peace of mind against potential early failures.
Final Thoughts on Choosing the Best 850W Sfx Power Supply
We have reviewed ten top-rated options ranging from budget choices to premium models. Each offers unique strengths in efficiency, noise control, and modern feature support.
Prioritize ATX 3.1 compliance and modular design to ensure your build is ready for future upgrades. These features help maintain stability and simplify cable management.
Please check current prices and availability before purchasing to get the best deal. Product offerings may change as technology evolves and new models enter the market.