As you gear up for your next build, selecting the right ATX 3.1 power supply is essential for maximizing performance. With advancements in technology, today’s options offer features that can elevate your gaming experience and guarantee stability. From fully modular designs to cutting-edge efficiency ratings, these power supplies have it all. Curious which models stand out in 2026? Let’s explore the top contenders that promise to meet your power needs.

CORSAIR RM1000x 1000W Fully Modular Power Supply

If you’re looking for a power supply that balances performance and efficiency, the CORSAIR RM1000x 1000W Fully Modular Power Supply is an excellent choice. With Cybenetics Gold Certification, you’ll enjoy up to 91% efficiency, leading to lower power consumption and cooler temperatures. Its ATX 3.1 compliance guarantees compatibility with PCIe 5.1, while the native 12V-2×6 connector eliminates the need for adapters. The fully modular design allows you to connect only the cables you need, and the sleek, modern appearance enhances your setup. Plus, the low-profile, flexible cables simplify installation, making it a top pick for any build.

Best For: Gamers and PC builders looking for a high-performance, efficient, and aesthetically pleasing power supply.

Pros:

• Cybenetics Gold Certified: Offers up to 91% efficiency for lower power consumption and cooler operation.
• Fully Modular Design: Allows for easy installation by connecting only necessary cables, reducing clutter.
• ATX 3.1 Compliant: Ensures compatibility with the latest PCIe 5.1 technology and eliminates the need for adapters.

Cons:

• Higher Price Point: Premium features may come at a cost that could be higher than standard power supplies.
• Limited Availability: May not be as widely available in all markets compared to more basic models.
• Potential Overkill for Low-End Builds: Excess power capacity might not be necessary for budget or entry-level systems.

CORSAIR RM850e 850W Fully Modular Power Supply

The CORSAIR RM850e 850W Fully Modular Power Supply stands out for gamers and PC builders who demand high performance and efficiency. Its fully modular design lets you connect only the cables you need, reducing clutter in your build. With Intel ATX 3.1 certification and Cybenetics Gold efficiency rating, it guarantees peak power delivery. The 120mm rifle bearing fan operates quietly, thanks to its specially calculated fan curve, even under full load. Plus, the 105°C-rated capacitors guarantee reliable performance, while Modern Standby compatibility enhances low-load efficiency and quick wake times. This power supply’s features make it a top choice for any high-end system.

Best For: Gamers and PC builders seeking a high-performance, efficient power supply with modular connectivity.

Pros:

• Fully modular design allows for a cleaner build by connecting only necessary cables.
• Cybenetics Gold efficiency rating ensures outstanding power delivery and reduced energy consumption.
• Quiet 120mm rifle bearing fan operates effectively under load while minimizing noise.

Cons:

• Higher price point compared to non-modular power supplies.
• Limited availability of specific connectors may require additional adapters for certain builds.
• Heavy weight may be cumbersome for small or lightweight builds.

CORSAIR HX1500i Fully Modular ATX Power Supply

For those seeking a powerful and efficient solution for high-performance builds, the CORSAIR HX1500i Fully Modular ATX Power Supply stands out as an exceptional choice. With Cybenetics Platinum efficiency, it guarantees your system runs smoothly while minimizing energy waste. The 140mm Fluid Dynamic Bearing fan offers quiet operation and durability, while the Zero RPM Fan Mode keeps things silent during low to medium loads. Its fully modular design lets you connect only the cables you need, keeping your build tidy. Plus, with CORSAIR iCUE software, you can customize fan curves and monitor power, enhancing your system’s performance effortlessly.

Best For: Enthusiasts and gamers seeking a high-performance, efficient power supply for demanding builds.

Pros:

• Cybenetics Platinum efficiency ensures minimal energy waste and smooth system operation.
• Fully modular design allows for a clean and organized build by connecting only necessary cables.
• Zero RPM Fan Mode provides silent operation during low to medium loads, enhancing user experience.

Cons:

• Higher price point compared to non-modular or lower wattage power supplies.
• May be overkill for users with less demanding setups, leading to unnecessary expenditure.
• Limited availability in some regions may make purchasing more challenging.

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

With its robust 850W power output and 80 PLUS Gold efficiency rating, the Thermaltake Toughpower GT 850W Power Supply (PS-TPT-0850FNFAGU-3) stands out as an ideal choice for gamers and PC enthusiasts seeking reliable performance. This fully modular PSU features low-profile, flat black cables that enhance airflow and simplify cable management. Equipped with smart zero fan technology, it adjusts fan speed to minimize noise during low-load operations. With a 5-year warranty and a solid safety profile, including multiple protection features, you can trust this power supply to deliver efficiency and reliability while powering your high-performance system.

Best For: Gamers and PC enthusiasts looking for a reliable and efficient power supply to support high-performance systems.

Pros:

• Fully modular design with low-profile cables for improved airflow and cable management.
• 80 PLUS Gold efficiency rating, ensuring up to 90% efficiency and lower energy costs.
• Smart Zero Fan technology minimizes noise during low-load operations for a quieter experience.

Cons:

• Slightly heavier at 5.35 pounds compared to some other power supplies.
• May be overkill for users with lower power requirements or less demanding systems.
• Limited to a 5-year warranty, which is shorter than some competitors’ offerings.

ASUS ROG Strix 1000W Platinum Fully Modular Power Supply

Power users and gamers seeking top-tier performance will find the ASUS ROG Strix 1000W Platinum Fully Modular Power Supply to be an excellent choice. With GaN MOSFET technology, it delivers up to 30% better power efficiency and boasts an 80 PLUS Platinum certification. The GPU-First voltage sensing enhances power delivery to graphics cards considerably. Its large heatsinks and dual ball fan bearings guarantee peak thermal management and quiet operation. Plus, it’s ATX 3.1 and PCIe 5.0 ready, providing future compatibility. With a fully modular design and a 10-year warranty, this power supply assures durability and organized cable management.

Best For: Gamers and power users looking for high efficiency and performance in their PC build.

Pros:

• 80 PLUS Platinum certification ensures exceptional power efficiency.
• Fully modular design allows for tidy cable management and customization.
• Equipped with advanced thermal management features for quiet and reliable operation.

Cons:

• Higher price point compared to standard power supplies.
• May be overkill for casual users with lower power requirements.
• Limited availability of specific connectors for older hardware.

ASUS ROG Strix 1200W Platinum Power Supply

The ASUS ROG Strix 1200W Platinum Power Supply stands out as a top choice for gamers and PC enthusiasts who demand exceptional performance and reliability. With GaN MOSFET technology, it offers up to 30% better power efficiency and is 80 PLUS Platinum certified. The GPU-First voltage sensing enhances voltage delivery by 45% to your graphics card. Its robust cooling features include large ROG heatsinks and dual ball fan bearings for quieter operation. Fully modular design guarantees a clean build, while ATX 3.1 compatibility and PCIe 5.0 readiness prepare you for the future. Plus, a 10-year warranty backs its reliability.

Best For: Gamers and PC enthusiasts seeking high-performance and efficient power supply solutions for their systems.

Pros:

• Superior power efficiency with GaN MOSFET technology, providing up to 30% better performance.
• Quieter operation due to large ROG heatsinks and dual ball fan bearings.
• Future-proof design with ATX 3.1 compatibility and PCIe 5.0 readiness.

Cons:

• Higher price point compared to non-Platinum rated power supplies.
• May be overkill for casual users with lower power requirements.
• Size can be a concern for compact builds due to its robust design.

GIGABYTE UD850GM PG5 V2 ICE Power Supply

For those seeking a reliable and efficient power supply for their high-performance gaming rigs or workstation setups, the GIGABYTE UD850GM PG5 V2 ICE stands out with its PCIe Gen 5.1 compatibility and 80 PLUS Gold certification. Its full modular design allows for easy cable management, while its compact size fits snugly within your case. The powerful single rail +12V ensures stable performance, backed by 100% Japanese capacitors. With an intelligent 120mm fan and optimized cooling solution, overheating won’t be an issue. Plus, it boasts multiple protection mechanisms, guaranteeing your components stay safe during intense gaming sessions.

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

Pros:

• Full modular design for easy cable management and a tidy build.
• 80 PLUS Gold certification ensures high energy efficiency and lower electricity bills.
• Multiple protection mechanisms provide enhanced safety for your components.

Cons:

• Compact size may limit compatibility with certain larger cases or setups.
• Premium features may come at a higher price point compared to basic power supplies.
• The reliance on a single rail +12V may not appeal to users who prefer multi-rail configurations.

MSI MAG A850GL 850W Power Supply

If you’re in the market for a reliable and efficient power supply, the MSI MAG A850GL 850W stands out with its 80 PLUS Gold certification, ensuring energy efficiency and lower electricity bills. This fully modular compact gaming power supply is ATX 3.1 and PCIe 5.1 ready, making it perfect for modern builds. Weighing just 6.23 pounds and measuring 12 x 8.75 x 4.92 inches, it easily fits into your setup. With a stellar 4.6-star rating from nearly 5,000 reviews, you can trust its performance. Plus, it comes with a 10-year warranty, guaranteeing long-lasting reliability.

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

Pros:

• High Efficiency: 80 PLUS Gold certification ensures energy savings and reduced electricity costs.
• Modular Design: Fully modular cables allow for easy cable management and customization in builds.
• Long Warranty: A 10-year limited warranty provides peace of mind regarding product reliability.

Cons:

• Weight: At 6.23 pounds, it may be heavier than some competing power supplies.
• Price Point: Higher initial cost compared to lower-rated power supplies.
• Size: May not fit in extremely compact cases due to its dimensions.

be quiet! Pure Power 13 M 1000W Power Supply

With its 80 PLUS Gold certification and impressive efficiency rating of up to 94.4%, the be quiet! Pure Power 13 M 1000W Power Supply is a top choice for serious gamers and builders. This ATX 3.1 PSU features native integration of a 12V-2×6 connector, making it ready for PCIe 5.1 GPUs. With 1000W of continuous power from a single 12V rail, it can handle power spikes effortlessly. The semi-passive cooling technology guarantees silent operation, while modular cables simplify your setup. Overall, it delivers exceptional performance and reliability, making it an excellent investment for any high-performance system.

Best For: Serious gamers and PC builders looking for a reliable, high-performance power supply with advanced features.

Pros:

• 80 PLUS Gold certification ensures high efficiency and lower energy costs.
• Modular cables allow for neat cable management and improved airflow within the case.
• Semi-passive cooling technology provides silent operation during low loads.

Cons:

• Higher price point compared to non-certified power supplies.
• May have more power than necessary for casual users or basic systems.
• Limited to ATX form factor, which may not fit all cases.

Rosewill VMG 750W 80+ Gold Full Modular Power Supply

The Rosewill VMG 750W 80+ Gold Full Modular Power Supply stands out as an excellent choice for gamers and PC builders looking for reliability and performance. With its 750W capacity and PCIe 5.1 support, you’ll enjoy up to 600W of direct power for next-gen GPUs. The full modular design guarantees neat cable management, while the compact chassis saves space. Its optimized thermal control and 120mm FDB silent fan keep your system cool and quiet. Plus, the six-protection suite secures your components, and the 5-year warranty gives you peace of mind, making this power supply a smart investment for 2026.

Best For: Gamers and PC builders seeking a reliable and high-performance power supply for next-gen systems.

Pros:

• Full modular design for improved cable management and airflow.
• 80 PLUS Gold certification ensures high energy efficiency and lower electricity bills.
• Comprehensive safety features including a six-protection suite to safeguard components.

Cons:

• Higher price point compared to non-modular power supplies.
• Limited compatibility with older GPU models that do not support PCIe 5.1.
• Compact size may not fit in all cases, depending on internal layout.

Factors to Consider When Choosing an ATX 3.1 Power Supply

When choosing an ATX 3.1 power supply, you’ll want to take into account several key factors. Power efficiency ratings, modular cable design, and effective cooling solutions can greatly affect your system’s performance. Additionally, verify compatibility with your components and check the warranty and support options available.

Power Efficiency Ratings

Choosing the right power efficiency rating for your ATX 3.1 power supply is essential for maximizing performance and minimizing energy waste. Look for 80 PLUS certification, which shows how effectively the power supply converts wall energy into usable power. A Gold-rated supply, for example, can reach up to 90% efficiency at 50% load, helping you save on electricity bills while generating less heat. Consider the Cybenetics certification system, which offers even higher performance ratings like Platinum. Power supplies with better efficiency ratings usually incorporate advanced components, ensuring cooler and quieter operation. By opting for a high-efficiency model, you enhance your system’s stability and longevity, reducing the stress on components caused by excess heat and power fluctuations.

Modular Cable Design

Selecting a power supply with a modular cable design can greatly enhance your system’s organization and airflow. A fully modular design lets you connect only the necessary cables, reducing clutter and making your build look cleaner. You’ll appreciate the embossed cables with low-profile combs, which not only simplify installation but also improve aesthetics. This design makes managing additional components easier, helping you maintain an organized setup. When it’s time to upgrade or repair, you can easily disconnect specific cables without removing the entire power supply, streamlining the process. Plus, many modern modular power supplies come with native 12V-2×6 connectors, ensuring compatibility with next-gen GPUs and eliminating the need for bulky adapters.

Cooling Solutions Offered

Cooling solutions play an essential role in ensuring your ATX 3.1 power supply operates efficiently and lasts longer. Look for models with advanced bearing designs like fluid dynamic or rifle bearings, which enhance durability while minimizing noise. Many of these power supplies also feature semi-passive or zero-RPM modes, keeping the fan off during low loads for quiet operation. Effective airflow management is vital, so opt for units with optimized fan blade designs and large heatsinks that dissipate heat efficiently. Smart fan technology is another great feature, adjusting fan speeds based on load to keep noise low when you’re not pushing your system hard. Plus, high-quality options often include safety features like over-temperature protection to prevent overheating.

Compatibility With Components

When upgrading or building a system, compatibility with components is essential for ensuring everything works seamlessly together. First, make sure your power supply is ATX 3.1 compliant; this guarantees it’ll work with the latest motherboards. You’ll also want to check for a native 12V-2×6 connector, as this helps connect next-generation GPUs directly, avoiding cumbersome adapters. Compatibility with Intel’s power specifications is vital to support modern processors and high-performance hardware. Additionally, consider the number and type of PCIe connectors available to match your graphics cards and other components. Finally, verify that the power supply can handle your system’s power demands, including transient power spikes, for stable operation. This attention to detail will lead to a smoother computing experience.

Warranty and Support Options

While you might focus on performance and features when choosing an ATX 3.1 power supply, warranty and support options are just as important. A 10-year warranty is common among high-quality models, showcasing the manufacturer’s confidence in their product’s reliability. Look for warranties that cover defects and failures, giving you peace of mind. Additionally, some brands offer return policies for defective products, allowing refunds or replacements for items that arrive damaged or “dead on arrival.” Extensive support options, like customer service for warranty claims, can be vital for resolving any issues you encounter. You might also consider extended warranty options for extra coverage beyond the standard period for added security with your investment.