When building a PC, choosing the right ATX 3.0 power supply is essential for reliability and efficiency. With the landscape evolving rapidly, it’s important to know which options stand out in 2026. From modular designs to impressive efficiency ratings, the top contenders promise to meet your computing needs. Curious about which power supplies are leading the pack? Let’s explore the best choices that could enhance your build and guarantee long-lasting performance.

Thermaltake Toughpower GT 850W ATX Power Supply

If you’re looking for a reliable power supply that meets modern standards, the Thermaltake Toughpower GT 850W ATX 3.1 is an excellent choice. This fully modular unit boasts 850W output and 80 PLUS Gold efficiency, ensuring up to 90% energy use. With native PCIe 12V-2×6 connectors, it’s perfect for modern GPUs. The smart fan technology adjusts speed based on load, keeping noise down during lighter tasks. Plus, its compact design (150mm x 140mm) and low-profile cables enhance airflow and cable management. With a 5-year warranty and strong safety features, you’ll have peace of mind for your PC build.

Best For: Gamers and PC builders seeking a high-efficiency, reliable power supply with modern connectivity options and low noise operation.

Pros:

• High efficiency: 80 PLUS Gold certification provides up to 90% energy use.
• Fully modular design: Enables easy cable management and improved airflow.
• Smart Zero Fan technology: Reduces noise during low-load operations.

Cons:

• Weight: At 5.35 pounds, it may be heavier than some competitors.
• Operating temperature range: Limited to 0°C to +40°C, which may not suit extreme environments.
• Price point: Higher cost compared to non-modular or lower-efficiency power supplies.

MSI MAG A850GL Fully Modular Gaming Power Supply (850W)

The MSI MAG A850GL Fully Modular Gaming Power Supply (850W) stands out as an ideal choice for gamers and PC builders seeking high efficiency and flexibility in their setups. With its 80 PLUS Gold certification, you can trust that it delivers reliable power while keeping energy costs low. Its compact design fits easily into various cases, and the fully modular cables simplify cable management. Additionally, it’s ATX 3.1 and PCIe 5.1 ready, ensuring compatibility with the latest components. With a 10-year warranty and an impressive 4.6-star rating from nearly 5,000 reviews, you’re making a smart investment for your gaming rig.

Best For: Gamers and PC builders looking for a high-efficiency, flexible power supply that is compatible with the latest hardware.

Pros:

• 80 PLUS Gold certification ensures energy efficiency and lower electricity costs.
• Fully modular design simplifies cable management, allowing for a cleaner build.
• 10-year warranty provides peace of mind and reliability over the long term.

Cons:

• Weight of 6.23 pounds may be heavier than some competing models.
• Limited return policy for conditions misrepresented by customers, which could lead to extra fees.
• Higher price point compared to non-modular or lower wattage power supplies.

CORSAIR RM850e Fully Modular 850W Power Supply

For gamers and PC enthusiasts seeking superior performance, the CORSAIR RM850e Fully Modular 850W Power Supply stands out in the ATX 3.0 category. Its fully modular design lets you connect only the cables you need, minimizing clutter. Certified with Intel ATX 3.1 standards, it boasts a Cybenetics Gold efficiency rating, ensuring peak power delivery. The 120mm rifle bearing fan features a smart curve to keep noise levels low, even under full load. Plus, its 105°C-rated capacitors guarantee reliability, while Modern Standby compatibility enhances efficiency during low-load situations. You’ll appreciate the steady, reliable power it provides for your build.

Best For: Gamers and PC enthusiasts who demand reliable performance and efficient power delivery in their builds.

Pros:

• Fully modular design allows for a cleaner and customizable cable management.
• High efficiency with Cybenetics Gold rating, ensuring optimal power delivery.
• Quiet operation due to the specially designed 120mm rifle bearing fan.

Cons:

• Higher price point compared to non-modular power supplies.
• May be overkill for basic or less demanding systems.
• Limited availability of cables if additional connections are needed for future upgrades.

be quiet! Pure Power 13 M 1000W Power Supply

Designed for gamers and PC enthusiasts who demand reliability and efficiency, the be quiet! Pure Power 13 M 1000W Power Supply excels in performance. With an 80 PLUS Gold certification and efficiency rating up to 94.4%, you’ll enjoy lower power consumption and quieter operation. Its ATX 3.1 compatibility and native 12V-2×6 connector guarantee it’s ready for future GPUs. Offering 1000W of continuous power, it handles power surges effortlessly. The semi-passive cooling technology keeps noise levels low, while modular cables simplify your setup. This power supply not only enhances performance but also maintains a tidy, efficient system layout.

Best For: Gamers and PC enthusiasts seeking a reliable, efficient power supply for high-performance systems.

Pros:

• 80 PLUS Gold certification ensures high efficiency and lower energy costs.
• Future-proof design with ATX 3.1 compatibility and support for the latest GPUs.
• Modular cables simplify installation and improve cable management for better airflow.

Cons:

• Higher price point compared to non-certified power supplies.
• Potential overkill for users with lower power requirements or less demanding systems.
• Semi-passive cooling may not be ideal for users who prefer constant fan operation for cooling.

Thermaltake Smart BM3 650W Semi-Modular Power Supply

Offering a reliable blend of performance and efficiency, the Thermaltake Smart BM3 650W Semi-Modular Power Supply is an excellent choice for gamers and PC builders looking to future-proof their systems. With its 80Plus Bronze certification and compliance with Intel ATX 3.0 and PCIe Gen 5 standards, you can count on solid performance. The high-quality Japanese 105°C main capacitor guarantees durability, while the 120mm fluid dynamic bearing fan, equipped with a Smart Zero Fan function, keeps your rig cool and quiet. Plus, the built-in industrial-grade protection gives you peace of mind for your valuable components. Enjoy a 5-year warranty for added confidence!

Best For: Gamers and PC builders seeking a reliable and efficient power supply that meets future standards.

Pros:

• 80Plus Bronze certification ensures energy efficiency and lower electricity bills.
• High-quality Japanese capacitors provide durability and long-lasting performance.
• Smart Zero Fan function allows for quiet operation by controlling fan speed based on load.

Cons:

• Semi-modular design may not suit users preferring fully modular power supplies for easier cable management.
• Limited wattage at 650W might not be sufficient for high-end multi-GPU setups.
• The 120mm fan may not provide enough airflow for overclocked systems under heavy load.

Rosewill VSB 650W Semi-Modular Power Supply

The Rosewill VSB 650W Semi-Modular Power Supply stands out as an excellent choice for gamers and PC builders seeking reliable performance and advanced connectivity. With 80+ Bronze certification, it guarantees efficient power delivery. Its semi-modular design keeps your build tidy, while the native PCIe 5.1 cable powers next-gen graphics cards with ease. You’ll appreciate the optimized thermal management, featuring a 120mm ICB Silent Fan for cool operation. Plus, its compact chassis saves space without compromising power. Equipped with a six-protection suite and a five-year warranty, this power supply assures safety and durability for your PC setup.

Best For: Gamers and PC builders seeking a reliable, efficient, and compact power supply for high-performance systems.

Pros:

• 80+ Bronze certified for energy efficiency, ensuring lower electricity costs.
• Semi-modular design allows for easy cable management and a clean build.
• Comprehensive safety features with a six-protection suite and a five-year warranty.

Cons:

• Limited modularity compared to fully modular power supplies, which may require additional cables.
• Power output may be insufficient for extremely high-end systems with multiple GPUs.
• Size may still be a concern for ultra-compact builds despite its smaller chassis.

Rosewill VMG 750W 80+ Gold Power Supply

If you’re seeking a power supply that balances efficiency and performance, the Rosewill VMG 750W 80+ Gold Power Supply stands out with its impressive 80 PLUS Gold certification. It delivers up to 750W, making it perfect for high-end builds. The full modular design and compact size guarantee easy cable management and fit in tight spaces. With dedicated PCIe 5.1 cables supporting next-gen GPUs, you’ll get 600W of direct power. Plus, its six-protection suite ensures safety, while a 120mm silent fan keeps things cool. Backed by a 5-year warranty, it’s a reliable choice for your system.

Best For: Gamers and PC builders looking for a reliable, high-efficiency power supply that supports next-gen hardware.

Pros:

• 80 PLUS Gold certification for enhanced energy efficiency and lower electricity bills.
• Full modular design allows for easy cable management and a cleaner build.
• Equipped with a six-protection suite for comprehensive safety and a 5-year warranty for peace of mind.

Cons:

• 750W may not be sufficient for extreme multi-GPU setups.
• Compact size might limit airflow in larger cases without proper ventilation.
• The price point could be higher compared to non-modular power supplies.

Cooler Master MWE Gold 850 V3 Full Modular PSU (850W, 80+ Gold)

Designed with gamers and content creators in mind, the Cooler Master MWE Gold 850 V3 Full Modular PSU (850W, 80+ Gold) stands out as a top choice for those looking to power high-performance systems. Its ATX 3.1 compatibility and 12V-2×6 PCIe 5.1 connector guarantee reliable power delivery to demanding GPUs like the Nvidia RTX 5080 and AMD RX 9070 XT. With a 10-year warranty, you can trust its durability. The advanced thermal management and Zero-RPM mode keep it cool and quiet under low loads, while the full modular design simplifies cable management, making your build cleaner and more efficient.

Best For: Gamers and content creators seeking a reliable and efficient power supply for high-performance systems.

Pros:

• High efficiency with 80+ Gold rating, ensuring optimal power delivery and reduced energy costs.
• Full modular design allows for easy cable management, leading to a cleaner and more organized build.
• 10-year warranty provides peace of mind regarding durability and long-term performance.

Cons:

• Higher price point compared to non-modular or lower-rated power supplies.
• Limited to ATX 3.1 compatibility, which may not be necessary for all users.
• May require additional cooling in setups with multiple high-performance components.

Lian Li Edge Series 1000W Full Modular Power Supply

For gamers and PC enthusiasts seeking top-tier performance, the Lian Li Edge Series 1000W Full Modular Power Supply stands out with its 80 PLUS Platinum efficiency rating. This power supply, model EG1000BE.US, complies with ATX 3.0/3.1 and PCIe 5.1, ensuring compatibility with the latest hardware. Its L-shaped design is perfect for dual chamber cases, while the 120mm FDB fan enhances cooling and reduces noise. You’ll appreciate the built-in USB expansion hub featuring four internal USB 2.0 headers. With 12V-2×6 alloy copper soldered terminals, you’re guaranteed enhanced performance and reliability for your powerful PC build.

Best For: Gamers and PC enthusiasts who demand high efficiency and performance from their power supply.

Pros:

• 80 PLUS Platinum efficiency ensures lower energy consumption and heat generation.
• Full modular design allows for customizable cable management, reducing clutter in your case.
• Built-in USB expansion hub with four internal USB 2.0 headers adds convenience for additional connectivity.

Cons:

• L-shaped design is primarily optimized for dual chamber cases, limiting compatibility with standard cases.
• Height restriction of 400mm may not fit in all setups, especially compact builds.
• Higher price point compared to non-modular or lower-rated power supplies may not appeal to budget-conscious users.

CORSAIR RM750x Fully Modular ATX Power Supply

The CORSAIR RM750x Fully Modular ATX Power Supply stands out as an ideal choice for gamers and PC builders seeking a reliable and efficient power solution. With its fully modular design, you’ll only connect the cables you need, guaranteeing a clean setup. This power supply is Cybenetics Gold-Certified, boasting up to 91% efficiency, which means lower power consumption and reduced noise. Its native 12V-2×6 connector offers direct GPU connections without adapters, enhancing compatibility with the latest graphics cards. Plus, compliance with the ATX 3.1 standard ensures your system remains stable, even during transient power spikes.

Best For: Gamers and PC builders looking for a reliable, efficient, and modular power solution.

Pros:

• Fully modular design allows for clean and customized cable management.
• High efficiency rating of up to 91% leads to lower power consumption and less noise.
• Direct GPU connections with the native 12V-2×6 connector eliminate the need for adapters.

Cons:

• May be priced higher than non-modular power supplies.
• Limited wattage may not be suitable for extremely high-end multi-GPU setups.
• Some users might find the installation of modular cables more complex than standard setups.

Factors to Consider When Choosing an ATX 3.0 Power Supply

When choosing an ATX 3.0 power supply, you’ll want to contemplate several essential factors. Think about your power output requirements and the efficiency rating, as these will impact performance and energy consumption. Additionally, decide whether you prefer a modular or non-modular design, as well as the cooling solutions available to keep your system running smoothly.

Power Output Requirement

Choosing the right power output for your ATX 3.0 power supply is essential to guarantee your system runs smoothly. Start by calculating the cumulative wattage needed for your components, including the CPU, GPU, and peripherals. A good rule of thumb is to choose a power supply that offers at least 20-30% more wattage than your total estimated usage. High-performance components, like gaming GPUs, can demand upwards of 600W alone, so factor that in when making your choice. Additionally, by selecting a power supply with a higher wattage output, you’ll future-proof your system against upgrades or new hardware that could increase power consumption. Stay ahead of the curve to ensure long-term stability and performance.

Efficiency Rating Importance

While you might focus on wattage when selecting an ATX 3.0 power supply, efficiency ratings play an essential role in ensuring ideal performance. Ratings like the 80 PLUS certification show how well a power supply converts AC power into usable DC power, with higher ratings indicating less energy waste. For instance, an 80 PLUS Gold rating guarantees at least 87% efficiency at 20% and 100% loads, and 90% at 50% load. This translates to lower electricity costs and reduced heat generation. Choosing a higher efficiency rating can extend your components’ lifespan by minimizing heat stress. Plus, it helps reduce your carbon footprint and leads to quieter operation, as less heat means lower fan speeds.

Modular vs. Non-Modular

As you evaluate the best ATX 3.0 power supplies, understanding the differences between modular and non-modular options is essential. Modular power supplies let you connect only the cables you need, enhancing cable management and airflow in your case. In contrast, non-modular supplies come with all cables permanently attached, which can create clutter and hinder airflow if not managed properly. Fully modular designs provide greater flexibility in cable routing and simplify installation compared to semi-modular or non-modular options. Although modular power supplies might cost more, their benefits—like improved aesthetics and easier upgrades—often justify the investment, especially for performance-focused builds. Consider your needs carefully to choose the right option for your setup.

Cooling Solutions Available

When selecting an ATX 3.0 power supply, consider the cooling solutions it offers, as they play an essential role in system performance and longevity. Many units feature advanced cooling with 120mm fans, using durable bearing types like hydraulic or fluid dynamic for quieter operation. Look for models with smart fan technology, which adjusts the fan speed based on load, optimizing cooling while minimizing noise during low-demand situations. Semi-passive cooling systems can turn off the fan entirely under low loads, enhancing silence and energy efficiency. Additionally, efficient designs with airflow-optimized fan blades and strategically placed vents guarantee effective heat dissipation. Finally, high-quality capacitors rated for 105°C bolster reliability, maintaining steady power delivery even under heavy loads.

Wattage Rating Considerations

Cooling solutions are important, but the wattage rating of your ATX 3.0 power supply is equally significant. This rating determines the maximum power your system’s components can receive, affecting performance and stability. For high-performance gaming rigs or workstations, aim for a wattage rating between 750W to 1000W to support demanding GPUs and CPUs. Don’t just focus on total wattage; make sure the distribution across the 12V rail meets your components’ needs. Also, consider future upgrades—having extra headroom prevents exceeding capacity. Opting for a power supply with a higher wattage than currently needed can boost efficiency and longevity, as power supplies work best at 50-80% of their total capacity. Make your choice wisely to guarantee reliable performance.

Connector Compatibility Needs

Selecting the right connectors for your ATX 3.0 power supply is vital for ensuring compatibility with your system’s components. Make sure it includes the native PCIe 12V-2×6 connector, which is necessary for modern graphics cards. Check that there are enough PCIe connectors, like the 6+2 pin type, to support multiple GPUs or high-power graphics cards. Also, look for backward compatibility with older standards to connect previous generation components. A fully modular design is ideal, as it allows you to connect only the cables you need, reducing clutter and improving airflow. Finally, assess the total wattage and power excursion capabilities, as these are essential for high-performance systems demanding more power.

Warranty Duration Significance

Choosing a power supply isn’t just about finding the right connectors; warranty duration plays a significant role in your decision-making process. A longer warranty often indicates the manufacturer’s confidence in the product’s reliability and longevity, with many power supplies offering warranties between 5 to 10 years. This duration reflects a commitment to durability and customer satisfaction. Having a robust warranty gives you peace of mind, protecting you against defects and failures during normal use. An extended warranty can enhance the overall value of your power supply, signaling it’s built to handle modern technology demands. When you compare options, consider warranty duration as an essential factor in evaluating your long-term investment and potential replacement costs.

Safety Features Evaluation**

When evaluating safety features in an ATX 3.0 power supply, it’s crucial to prioritize essential protection mechanisms. Look for built-in safeguards like Over Voltage Protection (OVP), Under Voltage Protection (UVP), Over Current Protection (OCP), Over Power Protection (OPP), Over Temperature Protection (OTP), and Short Circuit Protection (SCP). These features help prevent electrical failures and keep your system safe. A power supply with a high Mean Time Between Failures (MTBF) rating indicates greater reliability, which reduces the risk of component failure. Confirm the power supply meets recognized safety standards, like CE, UL, and TUV. Finally, opt for models with extensive warranties, as they reflect the manufacturer’s confidence in safety and durability, enhancing your overall peace of mind.