Thermaltake GF1 Fully Modular ATX 850W Power Supply
4.4Editor score
80 Plus Gold certified efficiency
Smart Zero Fan technology
Fully modular cabling design
In this guide
Choosing the right power supply is crucial for system stability and longevity. A fully modular PSU offers superior cable management, allowing you to connect only the cables you need for a cleaner build and better airflow inside your PC case.
We have analyzed the latest models from leading manufacturers to bring you this comprehensive list. Our comparison focuses on efficiency ratings, transient response, noise levels, and compatibility with modern hardware standards like ATX 3.1 and PCIe 5.1.
Each pick in this guide highlights specific strengths and ideal use cases for different builders. Please note that availability and pricing can fluctuate frequently, so verify current details before making your final purchase decision.
Top 3 Picks for Best Fully Modular PSU
CORSAIR RM850x ATX 3.1 PCIe 5.1 Ready Fully Modular 850W Power Supply
4.7Editor score
Cybenetics Gold efficiency rated
Native 12V-2×6 connector
Ultra-flexible embossed cables
ASUS ROG Strix 1000W Platinum Fully Modular Power Supply
4.8Editor score
80 Plus Platinum certified
GaN MOSFET technology
GPU-First voltage stabilizer
Top 10 Best Fully Modular PSU in 2026 Compared
This side-by-side comparison highlights the key specifications and distinguishing features of each selected power supply unit to help you make an informed decision based on your specific system requirements.
ProductsSpecificationsEditor scorePrice
Best Budget
MSI MAG A850GL PCIE5
850W continuous power output
80 Plus Gold certified
ATX 3.1 compatible
10 year warranty
4.5Editor score
Editor's Choice
CORSAIR RM850e (2025)
850W continuous power output
80 Plus Gold certified
ATX 3.1 compatible
Low noise fan curve
4.7Editor score
Editor's Choice
CORSAIR RM850x ATX 3.1
850W continuous power output
Cybenetics Gold certified
Native 12V-2×6 cable
Embossed flexible cables
4.7Editor score
CORSAIR RM1000x ATX 3.1
1000W continuous power output
Cybenetics Gold certified
Native 12V-2×6 cable
Embossed flexible cables
4.5Editor score
Thermaltake GF1 Fully Modular
850W continuous power output
80 Plus Gold certified
Zero RPM fan mode
Single 12V rail
4.4Editor score
be quiet! Pure Power 13 M
1000W continuous power output
Cybenetics Platinum certified
Semi-passive cooling
ATX 3.1 compliant
4.7Editor score
850W Fully Modular Power Supply
850W continuous power output
80 Plus Gold certified
140mm low noise fan
Japanese 105C capacitors
4.6Editor score
ASRock Steel Legend SL-850G
850W continuous power output
Cybenetics Platinum certified
5V BOOST function
Dual color 12V-2×6
4.5Editor score
CORSAIR RM850e (2025) White
850W continuous power output
80 Plus Gold certified
Rifle bearing fan
White cable kit
4.6Editor score
ASUS ROG Strix 1000W Platinum
1000W continuous power output
80 Plus Platinum certified
GaN MOSFET components
GPU-First stabilizer
4.8Editor score
1. CORSAIR RM850x ATX 3.1 – Best Overall Fully Modular PSU
CORSAIR RM850x ATX 3.1
850W total power output
Native 12V-2×6 cable
Fully modular cabling
Low noise fan design
The CORSAIR RM850x stands out as a top choice for enthusiasts seeking reliability and modern features. With a high rating and Cybenetics Gold certification, it delivers efficient power with minimal heat generation.
Pros
- Excellent transient response
- Highly flexible cables
- Superior noise performance
- Future ready ATX 3.1
- Strong warranty support
Cons
- Higher price point
- Slightly heavier unit
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Its native 12V-2×6 connector ensures seamless compatibility with the latest graphics cards without requiring adapters. The embossed cables are ultra-flexible, making cable management significantly easier during build.
While it comes at a premium price, the build quality and performance justify the investment. The low noise fan curve keeps the system quiet even under load, which is great for productivity setups.
This PSU is ideal for gamers and creators who want a balance of power, silence, and future proofing. If you value cable management and quiet operation, this model is highly recommended.
Superior Cable Flexibility
The embossed cables reduce resistance and stiffness, allowing for cleaner airflow and tighter bends in tight cases.
Modern Power Standards
Compliance with ATX 3.1 and PCIe 5.1 ensures stability during GPU power spikes and readiness for next gen hardware.
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2. Thermaltake GF1 Fully Modular – Best Budget Fully Modular PSU
Thermaltake GF1 Fully Modular
850W total power output
80 Plus Gold rated
Zero RPM fan mode
140mm fluid fan
The Thermaltake GF1 offers exceptional value for builders on a budget who still need a modular PSU. It carries an 80 Plus Gold rating and features a large 140mm fan for efficient cooling.
Pros
- Affordable price tag
- Quiet operation at low load
- Solid Gold efficiency
- Reliable protection circuits
- Easy cable management
Cons
- Less premium materials
- No ATX 3.1 support
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Smart Zero Fan technology ensures the fan stops at low loads, providing silent operation during browsing or light tasks. The single 12V rail design simplifies power distribution for most configurations.
While it lacks the latest ATX 3.1 transient response features, it remains a robust choice for current gen hardware. The protections are industry standard, offering peace of mind against power surges.
This PSU is perfect for entry level gaming rigs or home office PCs where cost efficiency matters. If you do not need the newest standards, this is a reliable and quiet option.
Quiet Performance
The zero RPM mode allows for completely silent operation when the system is idle or under light workloads.
Efficient Power Use
Gold certification ensures high energy conversion rates, reducing wasted electricity and heat inside the chassis.
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3. ASUS ROG Strix 1000W Platinum – Best Premium Fully Modular PSU
ASUS ROG Strix 1000W Platinum
1000W total power output
80 Plus Platinum rated
GaN MOSFET tech
Dual ball bearings
The ASUS ROG Strix 1000W Platinum is a top tier choice for high end workstation and gaming systems. It delivers outstanding stability with advanced GaN MOSFET technology for superior efficiency.
Pros
- Highest efficiency rating
- Advanced voltage stabilization
- Superior cooling design
- 10 year warranty
- Premium build quality
Cons
- High cost
- Large size
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A unique GPU First voltage stabilizer enhances power delivery directly to the graphics card for smoother performance. The 1000W capacity ensures plenty of headroom for overclocking and multi GPU setups.
The premium price reflects the high quality components and innovative features. It is significantly quieter than standard units due to optimized heatsinks and high quality bearings for longevity.
This PSU is best for enthusiasts who want the absolute best power delivery and future proofing. If you have a high end system and budget allows, this is a superior investment.
GaN MOSFET Technology
Gallium Nitride components allow for higher efficiency and a more compact internal layout compared to traditional silicon.
Smart Voltage Sensing
Intelligent voltage stabilization ensures consistent power to your GPU during heavy gaming sessions for maximum stability.
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4. CORSAIR RM1000x ATX 3.1 – High Power Fully Modular PSU
CORSAIR RM1000x ATX 3.1
1000W total power output
Cybenetics Gold rated
ATX 3.1 compliant
Embossed cables
The CORSAIR RM1000x offers massive power capacity with modern ATX 3.1 features for demanding systems. It maintains the signature low noise performance expected from the RMx series.
Pros
- High power capacity
- Silent fan performance
- Flexible cable management
- Future ready design
- Reliable output
Cons
- Costly compared to 850W
- Requires large case
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With a native 12V-2×6 connector, it is ready for the next generation of graphics cards. The 1000W rating supports intense gaming workloads and heavy multitasking without stress.
Its design focuses on quiet operation and reliability. The flexible cables make it easy to route power even in complex builds with many components and tight spaces.
This unit is suitable for workstation users or gamers with high end dual GPU configurations. If you need maximum power headroom, this is a robust and reliable choice.
Massive Capacity
Delivers consistent power even under heavy transient loads, ensuring your high end system remains stable.
Quiet Operation
The fan curve is designed to stay silent during typical usage, avoiding unnecessary noise pollution.
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5. be quiet! Pure Power 13 M – Silent Fully Modular PSU
be quiet! Pure Power 13 M
1000W total power output
80 Plus Gold rated
Semi-passive cooling
Lambda A+ acoustic
The be quiet! Pure Power 13 M focuses on silent operation with impressive efficiency ratings. It is designed to keep your system quiet during gaming and productivity tasks.
Pros
- Exceptionally quiet
- High efficiency
- Strong protection
- Platinum acoustic rating
- Future ready
Cons
- Premium price
- Shorter cable length
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Its semi-passive cooling mode stops the fan at low loads, ensuring near silence when your system is idle. The Lambda A+ acoustic certification confirms its top tier noise performance.
Despite the focus on silence, it delivers robust power for modern components. It supports ATX 3.1 standards and handles transient spikes with ease for reliable daily use.
This PSU is ideal for users who prioritize a quiet workspace and high quality components. If silence is your main goal, this model performs better than most competitors.
Silent Cooling
The optimized fan blades and zero RPM mode ensure the unit stays completely quiet under normal load.
Acoustic Excellence
Cybenetics Lambda A+ rating confirms this PSU produces minimal noise even under heavy system loads.
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6. MSI MAG A850GL PCIE5 – Compact Fully Modular PSU
MSI MAG A850GL PCIE5
850W total power output
80 Plus Gold rated
Native 12V-2×6 cable
10 year warranty
The MSI MAG A850GL PCIE5 is a solid choice for gamers needing a compact and reliable power solution. It features native ATX 3.1 support with a dual color 12V-2×6 cable for easy connection.
Pros
- Compact form factor
- Native PCIe 5.1 cable
- Gold efficiency
- Reliable protection
- Strong warranty
Cons
- Limited fan size
- Basic build feel
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Despite its compact size, it handles power spikes well and maintains stable voltage for modern components. The Gold certification ensures good efficiency levels for daily gaming and workloads.
Build quality is straightforward and robust, meeting industry standards for safety and performance. The 10 year warranty adds significant value for long term ownership and system protection.
This PSU is perfect for mid tower builds where space efficiency matters. If you want a modern ATX 3.1 ready unit without paying premium prices, this is a great pick.
Compact Design
Its smaller dimensions allow for better fit in smaller cases while still supporting high end components.
Modern Ready
With native 12V-2×6 support, it simplifies cable connections for new graphics cards without needing adapters.
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7. CORSAIR RM850e (2025) – Entry Level Fully Modular PSU
CORSAIR RM850e (2025)
850W total power output
80 Plus Gold rated
ATX 3.1 compliant
Low noise operation
The CORSAIR RM850e offers essential modern features at a more accessible price point than the RMx series. It is fully compatible with ATX 3.1 and PCIe 5.1 standards for new builds.
Pros
- Affordable ATX 3.1
- Reliable output
- Simple setup
- Low noise
- Stable voltage
Cons
- Lower efficiency than RMx
- No premium cables
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It delivers reliable power with a focus on keeping noise low. The rifle bearing fan and calculated curve ensure it runs smoothly without disturbing your work or gaming sessions.
While it lacks the premium features of higher models, it provides stable performance for most gamers. The fully modular design helps maintain a clean interior inside your PC case.
This PSU is best for budget conscious builders wanting modern standards. If you need a simple reliable unit for a new system, this model serves that purpose well.
Accessible Modern Tech
Brings ATX 3.1 support to a lower price tier for gamers needing future ready power.
Low Noise Operation
Designed for quiet environments, making it a good choice for home office or shared spaces.
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8. 850W Fully Modular Power Supply – Value Fully Modular PSU
850W Fully Modular Power Supply
850W total power output
80 Plus Gold rated
Japanese capacitors
140mm cooling fan
This unbranded option offers a feature rich package at a very competitive price point. It includes Japanese capacitors for stability and supports ATX 3.1 standards for future builds.
Pros
- Affordable price
- Japanese capacitors
- Full modularity
- Low noise fan
- Modern ready
Cons
- Basic features
- Limited support
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The large 140mm fan ensures quiet operation and effective cooling for the internal components. Its fully modular cables simplify the build process by removing unused connections.
While it lacks a big brand warranty, the specs indicate solid construction. It is a good choice for casual users who want modern standards without paying a high premium.
This PSU is ideal for tight budgets where modern features are still required. If you want ATX 3.1 support and modularity at the lowest price, this is a strong contender.
Quality Components
Japanese capacitors rated for 105C ensure long term stability and reliability under varying temperatures.
Modern Standard Ready
Supports ATX 3.1 and PCIe 5.1 to ensure compatibility with the latest hardware without needing adapters.
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9. ASRock Steel Legend SL-850G – Efficient Fully Modular PSU
ASRock Steel Legend SL-850G
850W total power output
Cybenetics Platinum rated
10 year warranty
5V BOOST function
The ASRock Steel Legend SL-850G stands out with its Cybenetics Platinum efficiency rating. This ensures high performance and low energy loss during operation for your PC.
Pros
- High efficiency rating
- Stable output
- Low noise design
- Future ready
- Japanese parts
Cons
- Mid range price
- Limited retail support
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It includes a 5V BOOST function to stabilize voltage during transient spikes, which protects sensitive components. The dual color 12V-2×6 cable simplifies connection to new graphics cards.
With a 10 year warranty and Japanese capacitors, it offers reliable long term service. The 135mm fan runs quietly, maintaining a peaceful environment for your workspace.
This PSU is perfect for builders who value efficiency and stability. If you want a high quality unit with modern features and a good warranty, this is a solid choice.
High Efficiency
Cybenetics Platinum rating ensures minimal energy waste and cooler operation for your system.
Voltage Stability
5V BOOST technology ensures consistent voltage output even during sudden power demand changes.
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10. CORSAIR RM850e (2025) White – White Fully Modular PSU
CORSAIR RM850e (2025) White
850W total power output
80 Plus Gold rated
ATX 3.1 compliant
White cables
The white variant of the RM850e offers the same reliable performance as the black version with clean aesthetics. It is perfect for builds where visual consistency is important for a clean look.
Pros
- Clean white aesthetics
- Low noise operation
- Reliable performance
- Modern ready
- Simple setup
Cons
- Higher price than black
- Basic features
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It supports modern ATX 3.1 standards and runs quietly thanks to the optimized fan curve. The fully modular cables help keep the interior looking tidy and organized.
While it costs slightly more than the black version, the aesthetic value justifies the price for many builders. It delivers stable power and maintains a quiet environment for gaming or work.
This PSU is best for white builds or minimalist setups. If you need a reliable modern PSU that matches your case and components, this white model is a great choice.
Aesthetic Match
The white cables match light colored PC cases for a cohesive and polished build appearance.
Reliable Output
Provides consistent power for all components ensuring your system runs smoothly during gaming.
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Buying Guide – How to Choose the Best Fully Modular PSU
Selecting the right power supply requires attention to several technical factors to ensure compatibility and reliability.
Wattage Requirements
Wattage determines the total power your system can draw. You should calculate the total wattage of your GPU and CPU and add a margin of 20 percent for efficiency.
Always choose a PSU with enough headroom to prevent stress on the unit during high load periods.
Efficiency Rating
Efficiency ratings like 80 Plus Gold or Platinum indicate how much power is converted efficiently. Higher ratings reduce heat and energy bills over the long term.
Look for a Gold or better rating to ensure you are getting a quality unit that performs efficiently.
ATX 3.1 Support
Modern GPUs require stable power during transient spikes. ATX 3.1 compliant units handle these spikes better and provide native 12V-2×6 connectors.
If you plan to use a latest gen GPU, ensure your PSU meets the ATX 3.1 standard for full compatibility.
Modular Design
Fully modular PSUs allow you to connect only the cables you need. This reduces clutter and improves airflow inside your PC case significantly.
Always opt for fully modular models to make cable management easier and the build cleaner.
Fan Noise and Cooling
Fan noise can be distracting during quiet work or gaming. Look for units with large fans and smart control modes like Zero RPM.
Ensure the fan bearings and control curves are rated for quiet operation to maintain a peaceful environment.
Build Quality and Capacitors
The internal components define the lifespan of the PSU. Japanese capacitors rated for high temperatures are more durable and reliable than generic alternatives.
Check for mentions of Japanese capacitors and quality assurance to ensure the unit lasts for years.
Warranty and Support
A longer warranty often reflects confidence in the product quality. A 10 year warranty offers peace of mind for long term ownership.
Choose a manufacturer with a proven track record of honoring warranties and providing customer support.
Voltage Regulation
Stable voltage is critical for component safety. Look for PSUs with LLC topology or similar features that ensure tight voltage regulation under load.
Consistent voltage prevents damage to your hardware and ensures smoother system performance.
How to Use and Care for Your Fully Modular PSU
When installing your fully modular PSU, ensure all cables are pushed in securely. Loose connections can cause power instability or system crashes.
Regularly clean dust from the fan and vents using compressed air to maintain cooling efficiency. Do not force the fan to spin by hand to avoid damage.
Avoid placing the PSU near heat sources or blocking the intake vents. Proper airflow is essential for longevity and optimal performance.
Frequently Asked Questions
What is the advantage of a fully modular PSU?
A fully modular PSU allows you to connect only the cables you need for your system. This reduces clutter and improves airflow inside the case making builds look cleaner and run cooler.
Is ATX 3.1 support necessary?
Yes for latest gen GPUs. ATX 3.1 units handle power spikes better and include native 12V-2×6 connectors reducing the need for adapters and ensuring stable performance.
How much headroom should I leave?
You should choose a PSU with about 20 percent more wattage than your system requires. This ensures the unit does not run at full load constantly improving efficiency and lifespan.
Do 80 Plus ratings matter?
Yes they do. Higher efficiency ratings like Gold or Platinum mean less wasted energy as heat. This leads to lower electricity costs and cooler internal temperatures.
Why do some cables have different colors?
Color coded connectors like the dual color 12V-2×6 cable help users identify connections easily. This prevents incorrect plugging and ensures secure installation with new hardware.
How long should a PSU last?
A quality PSU with Japanese capacitors can last many years. Proper care and ventilation are key to achieving the full lifespan and performance from the unit.
Can I mix cables from different PSUs?
No you should never mix cables from different power supply models. Pinouts often vary and mixing them can cause serious damage to your components and system.
What does Zero RPM mode do?
Zero RPM mode stops the fan when the load is low. This ensures completely silent operation during browsing or light tasks and extends the lifespan of the fan.
Final Thoughts on Choosing the Best Fully Modular PSU
Choosing the right fully modular PSU is about balancing power requirements and build goals. Our picks cover a range of options from budget friendly to premium performance models for any need.
Prioritize ATX 3.1 support and efficiency if you want future proofing. Quality components like Japanese capacitors ensure your unit remains reliable for years.
Always verify current prices and stock before buying as market conditions change frequently. Select the model that fits your budget and system needs best today.