As you look ahead to 2026, the landscape of ATX 3.1 power supplies is set to evolve significantly, especially for gamers and PC enthusiasts. With top models offering fully modular designs and impressive efficiency ratings, choosing the right power supply can make all the difference in performance. But how do you sift through the options to find the best fit for your needs? Let’s explore the top contenders and what makes them stand out.

CORSAIR RM850e 850W Fully Modular Power Supply

If you’re looking for a reliable power supply that perfectly balances performance and efficiency, the CORSAIR RM850e 850W Fully Modular Power Supply is an excellent choice. Weighing just 3.37 pounds, it features a fully modular design, allowing you to connect only the cables you need, making installation a breeze. With an impressive Cybenetics Gold efficiency rating, you can count on consistent performance. The 120mm fan operates quietly, even under heavy loads, while the ATX 3.1 and PCIe 5.1 certifications ensure compatibility with modern systems. Plus, the seven-year warranty offers peace of mind for your investment.

Best For: Gamers and PC builders seeking a high-performance, efficient power supply that is easy to install and compatible with modern hardware.

Pros:

• Fully modular design allows for a cleaner build and easier cable management.
• High efficiency rating (Cybenetics Gold) ensures reliable power delivery and reduced energy costs.
• Quiet operation with a specially designed 120mm fan, even under load.

Cons:

• Higher price point compared to some non-modular options on the market.
• May be overkill for basic builds that do not require 850W.
• Limited to a seven-year warranty, which, while long, is shorter than some competitors’ offerings.

CORSAIR RM1000x 1000W Power Supply

The CORSAIR RM1000x 1000W Power Supply stands out as an ideal choice for gamers and PC enthusiasts who demand top-tier performance and reliability. With its ATX 3.1 compliance and PCIe 5.1 support, you get impressive efficiency ratings—up to 91%—thanks to its Cybenetics Gold certification. The fully modular design lets you connect only the cables you need, simplifying your setup. Its embossed cables and low-profile combs enhance aesthetics while making installation easy. Plus, with low-noise operation and the ability to resist transient power spikes, you can trust it to deliver stable power to your components without interruptions.

Best For: Gamers and PC enthusiasts seeking a high-performance, reliable power supply with efficient power delivery and minimal noise.

Pros:

• Fully modular design allows for easy cable management and customization.
• High efficiency rating (up to 91%) leads to lower power consumption and cooler operation.
• Low-noise operation and resistance to power spikes ensure stable performance.

Cons:

• Higher price point compared to non-modular power supplies.
• May have more cables than necessary for users with minimal component needs.
• Availability might be limited due to high demand among enthusiasts.

CORSAIR HX1500i Fully Modular ATX Power Supply

For gamers and high-performance PC builders, the CORSAIR HX1500i Fully Modular ATX Power Supply stands out with its Intel ATX 3.1 certification, ensuring robust support for PCIe Gen 5 components and protection against power spikes. This power supply boasts a Cybenetics Platinum efficiency rating, allowing you to enjoy exceptional power efficiency. The fully modular design lets you connect only the cables you need, keeping your build tidy. Plus, the zero RPM fan mode ensures silent operation during low loads. With iCUE software, you can customize fan curves and monitor power. Enjoy peace of mind with a ten-year warranty and reliable performance.

Best For: Gamers and high-performance PC builders seeking a reliable and efficient power supply with advanced features.

Pros:

• Fully modular design allows for a clean and organized build.
• Exceptional power efficiency with an 80 PLUS Platinum rating.
• Includes iCUE software for customizable fan curves and power monitoring.

Cons:

• Higher price point compared to non-modular power supplies.
• Weighs 5.3 pounds, which may be heavier than some users prefer.
• Availability may be limited, as it was first released on April 15, 2025.

Thermaltake Toughpower GT 850W Power Supply (PS-TPT-0850FNFAGU-3)

Looking for a reliable power supply that meets modern gaming and workstation demands? The Thermaltake Toughpower GT 850W (PS-TPT-0850FNFAGU-3) could be your answer. With 80 PLUS Gold efficiency, it offers up to 90% efficiency, reducing energy waste. Its high amperage single +12V rail ensures stable power delivery for your high-end setups. Fully compatible with Intel ATX 3.1 specifications, it includes native PCIe 12V-2×6 connectors for the latest GPUs. Plus, the smart zero fan technology keeps noise down while a fully modular design aids in cable management. Enjoy peace of mind with a 5-year warranty, ensuring lasting performance.

Best For: Gamers and professionals seeking a high-efficiency power supply for demanding builds.

Pros:

• 80 PLUS Gold efficiency, providing up to 90% energy efficiency.
• High amperage single +12V rail for stable power delivery.
• Fully modular design with low-profile cables for improved airflow and easy cable management.

Cons:

• May be overkill for basic or low-power systems.
• Higher price point compared to non-modular options.
• Limited availability of specific connectors for older hardware.

Auotac 1000W Fully Modular Power Supply

With its impressive 80+ Gold certification and 92% efficiency, the Auotac 1000W Fully Modular Power Supply stands out as an ideal choice for gamers and PC enthusiasts seeking reliable performance. Weighing just 3.2 pounds and measuring 6 x 6 x 3.7 inches, it offers a compact design without compromising power. Its fully modular setup reduces cable clutter, enhancing airflow. Equipped with a dual-color PCI-E 5.1 cable, it supports high-end graphics cards effortlessly. Plus, the 140mm RGB fan quietly cools your system while customizable lighting adds flair. With a 10-year limited warranty, you can trust its long-term reliability.

Best For: Gamers and PC enthusiasts looking for a reliable and efficient power supply with customizable features.

Pros:

• 80+ Gold Certification ensures high efficiency and effective power transmission.
• Fully Modular Design reduces cable clutter, optimizing airflow and organization.
• 140mm RGB Fan provides quiet cooling with customizable lighting options.

Cons:

• Weight of 3.2 pounds may be heavier compared to some other power supplies.
• Limited Compatibility may restrict use with older components that do not support PCIe 5.1.
• Price Point may be higher than basic power supply models, making it less accessible for budget builds.

CORSAIR RM1200e Fully Modular ATX Power Supply

The CORSAIR RM1200e Fully Modular ATX Power Supply stands out as an excellent choice for gamers and PC builders who demand high performance and reliability. Its fully modular design lets you customize connections, while its ATX 3.1 compliance ensures support for PCIe Gen 5. With a 140mm rifle bearing fan and a carefully calculated fan curve, it keeps noise levels low, even under full load. Plus, its Cybenetics Platinum efficiency rating and 105°C-rated capacitors guarantee reliability. Enhanced low-load efficiency and modern standby mode make it perfect for varied system demands, providing optimal performance whenever you need it.

Best For: Gamers and PC builders seeking a high-performance, reliable power supply with low noise levels and customizable connections.

Pros:

• Fully modular design allows for customizable cable management.
• High Cybenetics Platinum efficiency rating ensures energy savings and reliability.
• Low noise operation even under full load due to a specially designed fan curve.

Cons:

• Higher price point compared to non-modular power supplies.
• May be overkill for basic or low-power systems.
• Availability may vary, potentially leading to longer wait times for purchase.

be quiet! Pure Power 12 M 1200W Modular Power Supply

For gamers and PC builders seeking a reliable power supply that blends efficiency and performance, the be quiet! Pure Power 12 M 1200W Modular Power Supply is an excellent choice. With its 80 Plus Gold certification, it boasts up to 93.0% efficiency, reducing energy waste and costs. This power supply supports ATX 3.1 and PCIe 5.1, ensuring compatibility with next-gen GPUs. It delivers 1200W of stable power and handles spikes up to 2000W. Plus, its ultra-quiet fan operates silently, making it perfect for noise-sensitive setups. Fully modular cables simplify installation and enhance airflow, creating a clean, efficient build.

Best For: Gamers and PC builders looking for a high-efficiency, reliable power supply that ensures compatibility with next-gen components while maintaining a quiet operation.

Pros:

• 80 Plus Gold certification for up to 93% efficiency, reducing energy costs.
• Dual 12V rails provide exceptional stability and can handle power spikes up to 2000W.
• Fully modular design allows for easy cable management and improved airflow.

Cons:

• Higher upfront cost compared to lower-rated power supplies.
• May be overkill for basic or non-gaming PC builds.
• Limited warranty period compared to some competitors in the market.

Cooler Master V850 SFX Gold Modular Power Supply (850W)

Ideal for gamers and creators seeking reliable power, the Cooler Master V850 SFX Gold Modular Power Supply (850W) stands out with its 80 Plus Gold efficiency and robust design. This compact ITX unit features a 90° 12VHPWR PCIe 5.1 connector, enhancing electrical durability and reducing clutter with customized cable lengths. Delivering up to 600W to your GPU, the V850 ensures top-notch performance with a high power density. Its efficient 92mm Fluid Dynamic Bearing fan and quality Japanese capacitors ensure excellent cooling and minimal ripple noise. Plus, with a 10-year warranty, you can trust its long-term reliability.

Best For: Gamers and creators seeking a reliable, high-efficiency power supply for compact ITX builds.

Pros:

• 80 Plus Gold efficiency ensures effective power transfer and reduced energy costs.
• Compact design with customized cable lengths helps reduce clutter and improve airflow in small cases.
• 10-year warranty provides peace of mind regarding long-term reliability and performance.

Cons:

• Higher price point compared to lower wattage options may not fit all budgets.
• Limited compatibility with larger cases due to SFX form factor.
• Noise levels may increase under heavy loads despite the fluid dynamic bearing fan.

CORSAIR RM1000x Shift Fully Modular ATX Power Supply

Designed with gamers and PC enthusiasts in mind, the CORSAIR RM1000x Shift Fully Modular ATX Power Supply stands out thanks to its innovative side modular interface, which simplifies cable access and management. You’ll appreciate the fully modular connectors that let you connect only the cables you need, promoting a cleaner build. The ultra-flexible debossed PVC cables enhance aesthetics and organization, while the 140mm fluid dynamic bearing fan ensures high performance and low noise. With 105°C-rated capacitors and Cybenetics Gold certification, this power supply guarantees durability and efficiency, making it an excellent choice for your next high-performance PC setup.

Best For: Gamers and PC enthusiasts seeking a high-performance power supply with excellent cable management and cooling features.

Pros:

• Innovative side modular interface for easier cable access and cleaner builds.
• Fully modular connectors allow for flexible routing, connecting only necessary components.
• High-quality components such as 105°C-rated capacitors and Cybenetics Gold certification ensure durability and efficiency.

Cons:

• Premium price point may not be suitable for budget builds.
• Size may be larger than some standard power supplies, potentially affecting case compatibility.
• Limited availability of certain features might not appeal to casual users who require simpler solutions.

Rosewill VSB 650W Semi-Modular Power Supply

The Rosewill VSB 650W Semi-Modular Power Supply stands out with its impressive 80+ Bronze certification, making it an excellent choice for gamers and PC builders seeking reliable and efficient power delivery. With a compact design, it measures just 5.51 x 5.9 x 3.38 inches and weighs 4.59 pounds. Its 650W output supports next-gen GPUs, featuring a dedicated PCIe 5.1 cable that delivers 450W directly to your graphics card. The six-protection suite ensures safety, while the optimized cooling system keeps things quiet. Backed by a 5-year warranty, this power supply boasts a solid 4.5-star rating from users.

Best For: Gamers and PC builders looking for a reliable and efficient power supply with support for next-gen graphics cards.

Pros:

• 80+ Bronze certification ensures energy efficiency and lower electricity bills.
• Compact design at 5.51 x 5.9 x 3.38 inches makes it suitable for smaller cases.
• Five-year warranty provides peace of mind and long-term reliability.

Cons:

• Semi-modular design may not offer as much flexibility in cable management as fully modular options.
• Weight of 4.59 pounds might be a consideration for very lightweight builds.
• Limited to 650W output, which may not be sufficient for extremely high-end builds with multiple GPUs.

Factors to Consider When Choosing an ATX 3.1 Power Supply With Cable Kit

When you’re selecting an ATX 3.1 power supply with a cable kit, several key factors come into play. You’ll want to consider the power rating, modular design, and cooling efficiency to ensure optimal performance. Also, compatibility with your components and the warranty offered can make a big difference in your overall satisfaction.

Power Rating Considerations

Choosing the right power rating for your ATX 3.1 power supply is crucial for ensuring your system runs smoothly and efficiently. First, assess the total wattage your components require, with options typically ranging from 650W to 1500W. It’s wise to select a power supply that offers at least 20% more wattage than your total to guarantee stable performance and accommodate future upgrades. Look for high efficiency ratings like 80 PLUS Gold or Platinum to minimize energy consumption and heat output. Consider the number of 12V rails as well; a single high-amperage rail can provide consistent power, while dual rails improve stability. Lastly, ensure the power supply can handle transient spikes, especially for modern GPUs that may demand double their rated wattage during peak performance.

Modular Cable Design

A modular cable design can significantly enhance your PC building experience by allowing you to use only the cables necessary for your setup. This reduces cable clutter and improves airflow within your case, creating a cleaner environment for your components. Fully modular power supplies typically include various cable types, such as native 12V-2×6 connectors that ensure compatibility with modern GPUs. The use of debossed PVC cables enhances flexibility, simplifying cable routing and organization. Additionally, fully modular designs make installation easier by eliminating unnecessary cables that could obstruct airflow. High-quality modular cables also withstand power spikes, ensuring stable power delivery and enhancing your system’s overall reliability and performance. Choosing a modular design is a smart move for efficient PC builds.

Cooling Efficiency Features

Modular cable designs not only improve organization, but they also play a vital role in optimizing cooling efficiency. When choosing an ATX 3.1 power supply, consider models with a 140mm fan. Its larger size allows for effective cooling while reducing noise levels, thanks to advanced bearing technology. Look for features like Zero RPM Fan Mode, which keeps the fan off during low or medium loads, minimizing noise during light use. Smart fan technology can also adjust speeds based on system demand, enhancing cooling without unnecessary noise. Additionally, high-quality capacitors rated for 105°C ensure reliability under heavy loads, while optimized airflow and temperature-controlled fan speeds help maintain lower operating temperatures, prolonging the life of your power supply and connected components.

Compatibility With Components

When it comes to ensuring your system runs smoothly, compatibility with components is crucial, particularly for an ATX 3.1 power supply. First, make sure the power supply complies with ATX 3.1 specifications to work seamlessly with modern motherboards and components. Look for native PCIe 12V-2×6 connectors, which provide direct power to the latest graphics cards, catering to their high power demands. Check if the supply supports transient power excursions for handling sudden spikes in GPU power usage. Additionally, confirm it has adequate wattage to meet the combined power needs of your CPU, GPU, and peripherals. Lastly, consider a fully modular design for better cable management, allowing you to connect only the necessary cables and improve airflow in your case.

Warranty and Support

Choosing an ATX 3.1 power supply involves more than just wattage and compatibility; warranty and support can significantly affect your long-term satisfaction. A longer warranty, like ten years, offers peace of mind about reliability and durability. However, warranty terms can vary widely, so it’s crucial to read the fine print to understand what’s covered and what’s not. Consider support options too; responsive customer service can make all the difference if you encounter issues. Some manufacturers even provide channels for user feedback, creating a sense of community. Lastly, check for a robust return policy for defective products, ensuring you can easily get a replacement or refund if your power supply arrives damaged or “dead on arrival.”

Noise Level Management

While warranty and support are important, noise level management can greatly enhance your overall experience with an ATX 3.1 power supply. When choosing, look for models featuring advanced fan technologies like Fluid Dynamic Bearings (FDB) for quieter operation and better cooling. Consider power supplies with Zero RPM or smart fan modes that keep the fan off during low to medium loads, drastically reducing noise when idle. Larger fans, such as 140mm, usually operate at lower RPMs, contributing to quieter performance. Evaluate fan curves designed to minimize noise while ensuring effective cooling. Lastly, opt for fully modular designs to improve cable management and airflow, which can further lower fan noise during operation.