Updated:23 October 2026
Rank 1-19 of the best 850W Power SUPplies
Our recommendation Price Customer rating
1. Comparison winner
NZXT C850 Gold ATX 3.1 Power Supply
NZXT C850 Gold ATX 3.1 Power Supply
Available immediately
free shipping
  • compliant with ATX 3.1 standard for stability, efficiency, and power spike resistance
  • delivers up to 600 watts to support high-performance graphics cards
  • features silent operation with ultra-low noise fan under 50% load
Our rating
9,8
very good
2. Best value
Corsair RM850e (2025) Fully Modular ATX Power Supply – 850W, White, ATX 3.1/PCIe 5.1, Cybenetics Gold, 105°C-rated Capacitors
Corsair RM850e (2025) Fully Modular ATX Power Supply – 850W, White, ATX 3.1/PCIe 5.1, Cybenetics Gold, 105°C-rated Capacitors
Available immediately
free shipping
  • modern standby compatibility enables very fast wake from sleep and improves efficiency at low loads
  • fully modular cabling lets you connect only the cables your system needs
  • 120 millimetre fan with a low noise bearing and a tuned fan curve keeps noise down even under full load
Our rating
9,8
very good
100+ purchases last month
3. Bestseller
MSI MAG A850GL Power Supply Unit (850W, 80 Plus Gold, Fully Modular, ATX 3.0, PCIe 5.0, Black Flat Cables, 7-Year Warranty)
MSI MAG A850GL Power Supply Unit (850W, 80 Plus Gold, Fully Modular, ATX 3.0, PCIe 5.0, Black Flat Cables, 7-Year Warranty)
Available immediately
free shipping
  • PCIe 5.0 GPU support with a native 16-pin connector can deliver up to 600 watts to PCIe 5.0 GPUs (NVIDIA and AMD compatible)
  • 80 PLUS Gold certification provides high efficiency under load, reducing energy consumption and heat generation in the system
  • Fully modular design with sleeved cables and management combs reduces cable clutter and improves airflow
Our rating
9,8
very good
MSI MPG A850GS 850W 80 Plus Gold ATX 3.1 PCIe 5.1 PSU with 12V 2x6-pin cables
MSI MPG A850GS 850W 80 Plus Gold ATX 3.1 PCIe 5.1 PSU with 12V 2x6-pin cables
Available immediately
free shipping
  • native 12V-2x6 connectors provide up to 600 watts of power per connector to support high-end graphics cards
  • 80 PLUS Gold certification indicating up to ninety percent efficiency
  • detachable modular cables for tidy builds and improved airflow with robust copper alloy connectors
Our rating
9,8
very good
Be quiet! Power Zone 850W Power Supply – 80 Plus Platinum, Cybenetics Platinum, Semi-Passive Zero-RPM Cooling, Pure Wings 3 140mm Fan, 90° Angled 12V-2x6 Connector, PCIe 5.1/ATX 3.1 Compatibility
Be quiet! Power Zone 850W Power Supply – 80 Plus Platinum, Cybenetics Platinum, Semi-Passive Zero-RPM Cooling, Pure Wings 3 140mm Fan, 90° Angled 12V-2x6 Connector, PCIe 5.1/ATX 3.1 Compatibility
Available immediately
free shipping
  • 850W of continuous power with a single 12V rail and the ability to handle brief power spikes up to twice the rated power
  • Efficiency up to 94.1% with 80 PLUS Platinum and Cybenetics Platinum certification, reducing energy consumption and contributing to cooler, quieter operation
  • A large 140mm Pure Wings 3 fan provides active cooling and can switch off at very low loads to reduce noise, with a cooldown period of 2 to 5 minutes after demand returns to avoid frequent starts and stops
Our rating
9,6
very good
GIGABYTE UD850GM PG5 V2 Power Supply 850W
GIGABYTE UD850GM PG5 V2 Power Supply 850W
Available immediately
free shipping
  • high performance for demanding computing tasks
  • energy efficiency for lower power consumption
  • fully modular design for easy cable management
Our rating
9,6
very good
Asus ROG Strix 850W Platinum PSU
Asus ROG Strix 850W Platinum PSU
Available immediately
free shipping
  • power efficiency increased by up to 30% due to GaN MOSFET
  • GPU voltage delivery improved by up to 45% for enhanced performance
  • large heatsinks maintain lower temperatures and noise levels
Our rating
9,6
very good
be quiet! Pure Power 13 M 850W Power Supply, 80 PLUS Gold, ATX 3.1, PCIe 5.1 Support, Semi-passive 120mm Fan
be quiet! Pure Power 13 M 850W Power Supply, 80 PLUS Gold, ATX 3.1, PCIe 5.1 Support, Semi-passive 120mm Fan
Available immediately
free shipping
  • 850 watts continuous power delivered on a single 12V rail provides stable performance for high end systems
  • 80 PLUS Gold certification with up to 94.4 percent efficiency reduces energy consumption and heat, helping to lower running costs and keep the system cooler and quieter
  • modular cabling design lets you remove unused cables for neater routing and improved airflow inside the case
Our rating
9,6
very good
Cooler Master MWE Gold 850 V2 ATX 3.1 Fully Modular PSU (UK Plug) 850W, 80 PLUS Gold, PCIe 5.1 Cabling, 120mm HDB Fan, 5 Year Warranty
Cooler Master MWE Gold 850 V2 ATX 3.1 Fully Modular PSU (UK Plug) 850W, 80 PLUS Gold, PCIe 5.1 Cabling, 120mm HDB Fan, 5 Year Warranty
Available immediately
free shipping
  • Performance: 850 watts maximum power output to support demanding gaming systems
  • Efficiency: 80 PLUS Gold rating with around 90% efficiency at typical load, reducing energy costs and heat from energy conversion
  • Modularity: fully modular design with ATX 3.1 compatibility and PCIe 5.1 12VHPWR 90-degree connector, enabling tidy cable management and improved internal ventilation
Our rating
9,5
very good
MONTECH Century II 850W Fully Modular ATX 3.1 PSU PCIe 5.1 Ready 80 Plus Gold and Cybenetics Platinum 10-Year Warranty
MONTECH Century II 850W Fully Modular ATX 3.1 PSU PCIe 5.1 Ready 80 Plus Gold and Cybenetics Platinum 10-Year Warranty
Available immediately
free shipping
  • 850 watt continuous power output for high-end gaming systems compatible with ATX 3.1 and PCIe 5.1
  • 80 Plus Gold and Cybenetics Platinum certified for high efficiency
  • fully modular design enabling you to connect only the cables you need including a 12V 2x6 PCIe cable
Our rating
9,4
good
MSI MAG A850GLS 850W PCIe 5.1 ATX 3.1 Power Supply (80 Plus Gold)
MSI MAG A850GLS 850W PCIe 5.1 ATX 3.1 Power Supply (80 Plus Gold)
Available immediately
free shipping
  • delivers up to 600 watts of power via native 12V 2x6 PCIe connectors to support PCIe 5.1 graphics cards
  • 80 PLUS Gold certified with efficiency up to 90 percent to reduce energy waste
  • low-noise cooling thanks to a 135 millimetre fluid-dynamic bearing fan
Our rating
9,3
good
200+ purchases last month
TUF Gaming 850W Gold Power Supply
TUF Gaming 850W Gold Power Supply
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free shipping
  • energy-efficient design for cost-effective performance
  • modular components for easy replacement and upgrade
  • advanced cooling system for optimal operation
Our rating
9,3
good
Asus Prime 850W Gold Gaming PSU
Asus Prime 850W Gold Gaming PSU
Available immediately
free shipping
  • provides efficient power delivery with up to 92% efficiency
  • complies with ATX 3.0 standards and includes a 16-pin PCIe Gen 5.0 compatible cable
  • efficient cooling with a 135mm dual ball bearing fan for increased lifespan
Our rating
9,1
good
CORSAIR RM850e (2025) Fully Modular ATX Power Supply, 850W, 12V-2x6 PCIe Cables, ATX 3.1, PCIe 5.1, Cybenetics Gold Efficiency, 105°C Capacitors, Black
CORSAIR RM850e (2025) Fully Modular ATX Power Supply, 850W, 12V-2x6 PCIe Cables, ATX 3.1, PCIe 5.1, Cybenetics Gold Efficiency, 105°C Capacitors, Black
Available immediately
free shipping
  • provides reliable high performance power delivery to support system stability
  • offers improved low-load efficiency, helping to reduce energy use when the system is idle or under light load
  • fully modular cabling lets you connect only the cables your build needs, reducing clutter and improving airflow
Our rating
9,1
good
MSI MAG A850GL 850W PSU
MSI MAG A850GL 850W PSU
Available immediately
free shipping
  • efficient power supply reduces energy consumption and system heat
  • fully modular atx 3.0 design reduces clutter with sleeved cables
  • supports pci express 5.0 graphics cards with native 16-pin connector for up to 600w power
Our rating
9,0
good
400+ purchases last month
SAMA G850 850W Gold PSU ATX 3.1 PCIe 5.1 Fully Modular White
SAMA G850 850W Gold PSU ATX 3.1 PCIe 5.1 Fully Modular White
Available immediately
free shipping
  • native 12V-2x6 power connector for graphics cards with full ATX 3.1 and PCIe 5.1 compatibility
  • up to 91.15% efficiency at typical load with 80 Plus Gold certification
  • fully modular cable design lets you use only the cables you need, improving airflow, cable management and case aesthetics
Our rating
8,8
good
Aerocool Integrator 850W Power Supply Unit
Aerocool Integrator 850W Power Supply Unit
Available immediately
free shipping
  • complies with the INTEL ATX12V Ver 2.4 design guide
  • achieves up to 85% efficiency with 80Plus Bronze certification
  • includes mesh sleeving on all direct DC cables to reduce airflow disruption
Our rating
8,6
good
GameMax Rampage 850W Power Supply, Full-Modular, 80 Plus Bronze
GameMax Rampage 850W Power Supply, Full-Modular, 80 Plus Bronze
Available immediately
free shipping
  • provides real gaming power with a single 12V rail for high compatibility and high current output
  • achieves 80 Plus Bronze certification with up to 88 percent efficiency at a 50 percent load
  • offers full-modular cabling allowing customisation and clutter reduction for improved airflow
Our rating
8,4
good
GameMax GP-Series 850W Power Supply GP-850, ATX, White
GameMax GP-Series 850W Power Supply GP-850, ATX, White
Available immediately
free shipping
  • up to 85 percent energy efficiency ensuring reduced heat generation and lower energy costs
  • 14cm fan with smart thermal control adjusts speed to maintain quiet operation
  • features active power factor correction and comprehensive safety protections for reliability
Our rating
7,5
satisfactory

Similar 850W Power SUPply comparisons

850W Power SUPplies buying guide: How to choose the right product from the above 850W Power SUPplies test or comparison

Understanding the Basics of 850W Power Supplies: Why Power Matters

What is an 850W Power Supply?

An 850W power supply unit (PSU) is a crucial component for any computer system that requires substantial power for its hardware components. This means it can deliver up to 850 watts of energy to all parts of your computer, including the motherboard, graphics card, and storage devices. Whether you’re a gamer, a creative professional, or simply need a solid setup for everyday tasks, a robust power supply ensures your system runs smoothly without any unexpected shutdowns or performance dips.

Why Wattage is Important

Wattage represents the amount of power available for your computer’s components. Having the right wattage is vital because if you provide too little, you run the risk of your components not functioning correctly or even getting damaged. An 850W power supply is ideal for high-performance systems that include multiple graphics cards or other power-hungry hardware, giving you enough headroom for future upgrades or additional components.

Key Features to Look for in an 850W Power Supply: User-Friendly Insights

Efficiency Ratings

When shopping for an 850W power supply, it’s essential to consider its efficiency rating. An efficient PSU converts a larger portion of the electrical energy it draws into usable power for your components, which not only saves on your electricity bill but also reduces heat generation inside your case. Look for models with a high efficiency rating, preferably 80 Plus Gold or Platinum, indicating they operate at a higher efficiency, leading to lower energy waste.

Modular Design Options

Modular power supplies come in three types: non-modular, semi-modular, and fully modular. Non-modular units have all cables attached – this can lead to a cluttered case. Semi-modular options allow you to detach some cables while others are fixed. Fully modular PSUs let you connect only the cables you need, making your setup cleaner and improving airflow, which is essential for maintaining optimal temperatures.

Cooling Solutions

A quality cooling solution is another critical feature in an 850W power supply. Many good PSUs come equipped with quiet or even silent fans that activate only when needed. This not only helps keep your power supply cool under load but also ensures that your computer remains quiet during less demanding tasks. Adequate ventilation, combined with a well-placed fan, increases the longevity of your power supply.

Top 850W Power Supplies Reviewed: Our Top Picks and Their Benefits

Our Recommended Option

We recommend looking at the popular models in the market that consistently receive positive feedback for their performance and reliability. One standout option offers a fully modular design, high efficiency rating, and extensive thermal management features, ensuring you can rely on it even during demanding tasks. Users appreciate its quiet operation and robust build quality, making it a trustworthy choice for both gamers and professionals.

Comparing Features and Prices

When comparing different 850W power supplies, consider key factors like warranty and customer service, alongside price. Some manufacturers stand out for their longer warranty periods, indicating confidence in their products. Take the time to analyse user reviews and feedback to find models that surpass average expectations, especially in areas like noise levels and longevity.

Installation Made Easy: Step-by-Step Guide for Your New Power Supply

Preparing Your Workspace

Before diving into the installation, ensure you have a clean, static-free workspace with plenty of room to manoeuvre. Gather the necessary tools, usually just a screwdriver, and perhaps some cable ties to manage the cables later.

Removing the Old Power Supply

First, unplug your old PSU and carefully disconnect all the power cables connecting it to your components. Keep track of where each cable goes to make reinstallation easier. After that, unscrew the power supply from the case and slide it out.

Installing the New PSU

Take your new 850W power supply and place it into the same spot where the old one was removed. Secure it with screws to keep it firmly in place. Next, connect the various power cables back to your motherboard, CPU, graphics card, and any other components. With a modular unit, only connect the cords you need, and use cable ties to keep things tidy.

Maximising Performance: Tips for Using Your 850W Power Supply Effectively

Regular Maintenance Checks

To ensure your PSU operates efficiently over time, conduct regular maintenance checks. Dust build-up can lead to overheating, so using compressed air to clean your power supply and surrounding components every few months helps maintain optimal performance.

Monitoring Power Usage

Keep an eye on your overall power usage, especially if you add new components or upgrade existing ones. Understanding your system’s power draw helps ensure you’re not pushing your PSU to its limits unnecessarily.

Stay Informed About Upgrades

As technology evolves, hardware requirements change. An 850W power supply provides flexibility for future upgrades; however, (like all components), it’s essential to stay updated on your hardware’s requirements. Ensuring that your PSU can adequately support any new components down the line keeps your system stable and efficient.

Table of contents
  1. Understanding the Basics of 850W Power Supplies: Why Power Matters
  2. Key Features to Look for in an 850W Power Supply: User-Friendly Insights
  3. Top 850W Power Supplies Reviewed: Our Top Picks and Their Benefits
  4. Installation Made Easy: Step-by-Step Guide for Your New Power Supply
  5. Maximising Performance: Tips for Using Your 850W Power Supply Effectively

Overview

1. Comparison winner
NZXT C850 Gold ATX 3.1 Power Supply
Our rating
9,8
very good
NZXT C850 Gold ATX 3.1 Power SupplyAvailable immediately
2. Best value
Corsair RM850e (2025) Fully Modular ATX Power Supply – 850W, White, ATX 3.1/PCIe 5.1, Cybenetics Gold, 105°C-rated Capacitors
Our rating
9,8
very good
Corsair RM850e (2025) Fully Modular ATX Power Supply – 850W, White, ATX 3.1/PCIe 5.1, Cybenetics Gold, 105°C-rated CapacitorsAvailable immediately
3. Bestseller
MSI MAG A850GL Power Supply Unit (850W, 80 Plus Gold, Fully Modular, ATX 3.0, PCIe 5.0, Black Flat Cables, 7-Year Warranty)
Our rating
9,8
very good
MSI MAG A850GL Power Supply Unit (850W, 80 Plus Gold, Fully Modular, ATX 3.0, PCIe 5.0, Black Flat Cables, 7-Year Warranty)Available immediately
MSI MPG A850GS 850W 80 Plus Gold ATX 3.1 PCIe 5.1 PSU with 12V 2x6-pin cables
Our rating
9,8
very good
MSI MPG A850GS 850W 80 Plus Gold ATX 3.1 PCIe 5.1 PSU with 12V 2x6-pin cablesAvailable immediately
Be quiet! Power Zone 850W Power Supply – 80 Plus Platinum, Cybenetics Platinum, Semi-Passive Zero-RPM Cooling, Pure Wings 3 140mm Fan, 90° Angled 12V-2x6 Connector, PCIe 5.1/ATX 3.1 Compatibility
Our rating
9,6
very good
Be quiet! Power Zone 850W Power Supply – 80 Plus Platinum, Cybenetics Platinum, Semi-Passive Zero-RPM Cooling, Pure Wings 3 140mm Fan, 90° Angled 12V-2x6 Connector, PCIe 5.1/ATX 3.1 CompatibilityAvailable immediately
GIGABYTE UD850GM PG5 V2 Power Supply 850W
Our rating
9,6
very good
GIGABYTE UD850GM PG5 V2 Power Supply 850WAvailable immediately
Asus ROG Strix 850W Platinum PSU
Our rating
9,6
very good
Asus ROG Strix 850W Platinum PSUAvailable immediately
be quiet! Pure Power 13 M 850W Power Supply, 80 PLUS Gold, ATX 3.1, PCIe 5.1 Support, Semi-passive 120mm Fan
Our rating
9,6
very good
be quiet! Pure Power 13 M 850W Power Supply, 80 PLUS Gold, ATX 3.1, PCIe 5.1 Support, Semi-passive 120mm FanAvailable immediately
Our product comparisons are:
Always up to date:
At most every 120 days, we update each category with new products and research developments in the top rankings. This ensures that our recommendations are always up to date
Neutral and independent:
Our tests and comparisons are objective and fact-based. Manufacturers have no influence on the ratings. We aim to provide greater transparency in the market, thereby promoting product quality.
Method-driven
In our tests & comparison tables, we only include products that meet our minimum standards. This ensures that you can find the perfect product for your needs from a wide selection.
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