Thermaltake GF1 Fully Modular ATX 850W Power Supply
4.4Editor score
80 Plus Gold efficiency
Ultra quiet 140mm fan
Single 12V rail design
In this guide
Choosing a reliable power supply is crucial for any gaming PC build. A fully modular design helps you manage cables easily while ensuring efficient power delivery to your components.
We evaluated ten top-rated units based on efficiency ratings, cable flexibility, and support for the latest hardware standards like ATX 3.1 and PCIe 5.1.
Each pick highlights key strengths and potential trade-offs to help you decide. Note that product availability and pricing may change over time.
Top 3 Picks for Best Fully Modular Power Supplies for Gaming Pcs
CORSAIR RM850x ATX 3.1 PCIe 5.1 Ready Fully Modular 850W Power Supply
4.7Editor score
Cybenetics Gold efficiency
Native 12V-2×6 connector
Embossed low-profile cables
ASUS ROG Strix 1000W Platinum
4.8Editor score
GaN MOSFET efficiency
GPU-First voltage stabilizer
Dual ball fan bearings
Top 10 Best Fully Modular Power Supplies for Gaming Pcs in 2026 Compared
The following comparison table outlines the core specifications and features of each unit to help you make an informed decision.
ProductsSpecificationsEditor scorePrice
Best Budget
MSI MAG A850GL
850W power output
80 Plus Gold certified
ATX 3.1 compliant
Dual color cable
4.5Editor score
Editor's Choice
CORSAIR RM850e
850W power output
120mm rifle fan
ATX 3.1 compliant
Modern standby ready
4.7Editor score
Editor's Choice
CORSAIR RM850x
850W power output
Cybenetics Gold rated
Native 12V-2×6
Embossed flat cables
4.7Editor score
CORSAIR RM1000x
1000W power output
Cybenetics Gold rated
Native 12V-2×6
Low-profile combs
4.5Editor score
Thermaltake GF1
850W power output
Smart Zero Fan tech
80 Plus Gold rated
DC to DC design
4.4Editor score
be quiet! Pure Power 13 M
1000W power output
Cybenetics Platinum rated
Zero RPM cooling
LLC topology stable
4.7Editor score
ASRock Steel Legend SL-850G
850W power output
Japanese capacitors
iCool fan control
5V BOOST function
4.5Editor score
ASUS ROG Strix 1000W
1000W power output
GaN MOSFET tech
GPU-First sensing
Dual ball bearings
4.8Editor score
ASUS TUF Gaming 1000W
1000W power output
Military-grade components
Axial-tech fan
PCB protective coating
4.7Editor score
CORSAIR HX1500i
1500W power output
140mm FDB fan
iCUE software support
Zero RPM mode
4.5Editor score
1. CORSAIR RM850x – Best Overall Fully Modular Power Supply
CORSAIR RM850x
850W continuous power
Cybenetics Gold efficiency
Native 12V-2×6
10-year warranty
This unit stands out as the Editor's Choice for its perfect blend of performance and modern features. It holds a strong rating and supports the latest ATX 3.1 standards effectively.
Pros
- Native cable for latest GPUs
- Silent operation at low load
- Flexible embossed cables
- Strong transient response
- Excellent efficiency ratings
Cons
- Higher price than rivals
- Case clearance needed
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Key strengths include the native 12V-2×6 connector which eliminates the need for adapters on new graphics cards. The Cybenetics Gold certification ensures high efficiency during gaming loads.
Trade-offs include a slightly higher cost compared to entry-level modular units. However, the build quality and warranty support make this investment worthwhile for serious builders.
Buyers seeking a balanced mix of reliability and future-proofing should prioritize this model. It is highly recommended for high-end gaming systems needing stable power delivery.
Future-Proof Connectivity
The native connector ensures compatibility with next-gen GPUs without extra hardware.
Efficiency Benefits
High efficiency reduces heat output and lowers overall electricity usage.
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2. Thermaltake GF1 – Best Budget Fully Modular Power Supply
Thermaltake GF1
850W output
80 Plus Gold
Smart Zero Fan
Single 12V rail
This power supply offers exceptional value for budget-conscious gamers needing reliable power. It carries a solid rating and meets standard efficiency requirements for most PC configurations.
Pros
- Affordable price point
- Quiet 140mm fan
- Full modular cabling
- Solid protection suite
- Good for standard builds
Cons
- Lacks ATX 3.1 support
- Basic component quality
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Its main advantage is the fully modular design paired with a quiet large diameter fan. The Smart Zero Fan technology ensures silence during lighter tasks like web browsing.
However, it lacks support for newer ATX 3.1 transient power handling standards. This limits its longevity if you plan to upgrade to the latest high power GPUs soon.
Ideal for builders prioritizing cost without sacrificing essential modularity and silence. Choose this if you need a solid upgrade for an existing mid-range gaming PC system.
Silent Cooling
The large fan spins slower to provide cooling while staying nearly silent.
Modular Flexibility
Connecting only necessary cables keeps the case interior tidy and clean.
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3. ASUS ROG Strix – Best Premium Fully Modular Power Supply
ASUS ROG Strix 1000W
1000W output
Platinum efficiency
GaN MOSFET tech
GPU-First sensing
This top-tier unit delivers premium performance for enthusiasts seeking the best power stability. It achieves the highest rating in our list and uses advanced GaN technology internally.
Pros
- Advanced voltage stabilization
- Superior cooling technology
- Highly efficient operation
- Robust build quality
- Dual ball bearing fans
Cons
- Premium price tag
- Overkill for basic needs
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Its standout feature is the GPU-First intelligent voltage stabilizer which enhances delivery to graphics cards for smoother gameplay. The Platinum efficiency rating ensures minimal energy waste.
The main trade-off is the cost which significantly exceeds standard gold rated units. However, the specialized components and superior cooling justify the expense for high-end builds.
Buyers with top-tier hardware should choose this model for maximum reliability. It ensures your system runs smoothly under heavy gaming loads without voltage fluctuations.
Stabilized Power
Patented technology stabilizes voltage directly to the graphics card.
Advanced Cooling
Large heatsinks and dual ball bearings keep temperatures low.
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4. MSI MAG A850GL – Compact Fully Modular Power Supply
MSI MAG A850GL
850W output
ATX 3.1 ready
Native 12V-2×6
Compact form factor
This unit focuses on compatibility with compact builds while maintaining modern standards. It holds a strong rating and supports ATX 3.1 with a native 12V-2×6 connector.
Pros
- Compact case-friendly size
- Dual-color cable indicator
- Full modular design
- Strong protection suite
- Good mid-range value
Cons
- Shorter cable length options
- Basic aesthetic design
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The dual-color cable design simplifies installation by making correct connection obvious visually. Its compact dimensions allow it to fit easily into smaller chassis cases.
Limitations include standard cable lengths which might not reach components in very large cases. Additionally, the aesthetic design is minimal compared to gaming focused brands.
Recommended for builders needing a reliable and compact unit with modern features. It serves as a solid foundation for high-end gaming systems in smaller cases.
Compact Design
Its size ensures compatibility with smaller cases without sacrificing power.
Visual Clarity
Color coded cables reduce the risk of incorrect connection during install.
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5. CORSAIR RM850e – Efficient Fully Modular Power Supply
CORSAIR RM850e
850W output
120mm rifle fan
105C caps
ATX 3.1 support
This 2025 model balances modern efficiency with proven Corsair reliability. It holds a high rating and brings ATX 3.1 compliance to a popular chassis form factor.
Pros
- Rifle bearing fan
- High quality capacitors
- Modern standby ready
- Full modular cabling
- Quiet operation
Cons
- Standard aesthetic design
- No specific branding features
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Key strengths include the rifle bearing fan which offers long life and low noise. The high temperature rated capacitors ensure steady electrical performance under stress.
It lacks specific gaming branding features found in higher tier units from the same brand. This makes it less visually distinctive in a clear side glass case.
Choose this for a reliable and efficient standard build focused on performance. It is an excellent choice for users prioritizing function over cosmetic features.
Rifle Bearing Fan
Specially designed fan curves keep noise low even under full load.
Reliability
High rated capacitors ensure steady and dependable electrical output.
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6. CORSAIR RM1000x – High Power Fully Modular Power Supply
CORSAIR RM1000x
1000W output
Cybenetics Gold
Native 12V-2×6
Low-profile combs
This power supply targets users needing significant headroom for future upgrades. It holds a strong rating and supports the latest PCIe 5.1 platform standards effectively.
Pros
- High wattage headroom
- Flexible cables included
- Modern ATX standard
- Quiet fan operation
- Reliable power delivery
Cons
- Heavier unit weight
- Standard aesthetics
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Key strengths include the native 12V-2×6 connector and flexible low profile cables. These features ensure clean builds while maintaining compatibility with modern hardware.
Its higher wattage results in a heavier unit that requires careful mounting in smaller cases. Also, the aesthetics remain minimal compared to enthusiast tier units.
Buyers planning multiple GPU upgrades should prioritize this model. It ensures your system is ready for future power demands without hardware swaps.
Power Headroom
Extra wattage allows for future hardware upgrades without replacement.
Cable Quality
Flexible cables make routing easier in tight case environments.
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7. be quiet! Pure Power – Silent Fully Modular Power Supply
be quiet! Pure Power 13 M
1000W output
Cybenetics Platinum
Zero RPM cooling
LLC topology
This unit excels at silence and efficiency for quiet gaming systems. It holds a high rating and brings Platinum certification to a mainstream price point.
Pros
- Platinum efficiency rating
- Zero RPM mode
- Low noise operation
- Strong transient handling
- Reliable topology
Cons
- Cable management may be tight
- Limited aesthetic choices
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Its zero RPM cooling mode ensures the fan stops completely during low load. The LLC topology provides best-in-class voltage regulation for stable operation.
Some users might find cable routing challenging due to the compact chassis design. However, the silence and efficiency benefits usually outweigh these minor drawbacks.
Ideal for builders prioritizing quiet operation over flashy aesthetics. Choose this if your goal is a silent PC that handles modern power spikes efficiently.
Silent Operation
Fan switches off during low load for near silent operation.
Efficiency
Platinum rating ensures high energy savings and less waste heat.
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8. ASRock Steel Legend – Reliable Fully Modular Power Supply
ASRock Steel Legend SL-850G
850W output
Japanese capacitors
iCool fan control
5V BOOST function
This unit combines reliability with modern ATX 3.1 features at a competitive price. It holds a strong rating and uses premium Japanese capacitors for stability.
Pros
- High quality components
- Dual color connector
- Strong warranty
- 5V BOOST feature
- Silent operation
Cons
- Brand availability issues
- Basic internal design
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Key strengths include the iCool fan control and the 5V BOOST function for stability. The dual color connector simplifies installation for next generation GPU power.
Brand support might be less accessible in some regions compared to major brands. However, the component quality and warranty offer significant value for cautious buyers.
Buyers seeking strong internal components without the premium brand tax should choose this. It is highly recommended for stable builds needing modern connectivity.
Quality Parts
Japanese capacitors ensure exceptional long term reliability and performance.
Smart Fan Control
Intelligent control keeps fan off during low loads for silence.
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9. ASUS TUF Gaming – Durable Fully Modular Power Supply
ASUS TUF Gaming 1000W
1000W output
Military-grade components
Axial-tech fan
PCB coating
This unit focuses on durability and longevity for demanding gaming environments. It holds a high rating and features military-grade components designed to last.
Pros
- Military-grade durability
- Protective PCB coating
- Long lifespan fans
- Strong ATX support
- High quality components
Cons
- Cables slightly stiff
- Basic design aesthetic
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Its protective PCB coating guards against dust and moisture ensuring long life. Dual ball bearings ensure the fan lasts longer than standard sleeve designs.
Cables may feel slightly less flexible than premium units from competitors. However, the reliability and protection features make it ideal for humid or dusty spaces.
Choose this if durability and resistance to harsh conditions are priorities. It is a robust solution for gamers needing a system that lasts.
Durability
Military-grade parts and coating protect against dust and extreme temps.
Longevity
Ball bearings extend fan life compared to standard sleeve designs.
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10. CORSAIR HX1500i – Extreme Power Fully Modular Power Supply
CORSAIR HX1500i
1500W output
140mm FDB fan
iCUE software
Zero RPM mode
This unit offers massive power for extreme multi-GPU or workstation setups. It holds a strong rating and supports all modern standards with software control.
Pros
- Massive wattage
- Software control
- Large quiet fan
- Full modular design
- Zero RPM mode
Cons
- Overkill for most
- Highest price
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Key strengths include software control via iCUE to customize curves and protection. The large fan ensures cooling remains effective without raising noise levels.
Most users will find this capacity unnecessary and the cost prohibitive. However, for extreme workloads, this unit provides unmatched flexibility and power headroom.
Buyers with specialized extreme workloads should choose this model for power. It ensures your system never lacks voltage regardless of component demands.
Software Control
iCUE allows customization of fan curves and safety features.
Silent Cooling
Large fan keeps noise low even during peak power draw.
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Buying Guide – How to Choose the Best Fully Modular Power Supplies for Gaming Pcs
Selecting the right power supply involves balancing efficiency, wattage, and features.
Wattage Capacity
Ensure the unit provides enough wattage for your CPU and GPU combined plus headroom for spikes. Most modern gaming rigs require at least 850W for high-end GPUs.
Always choose a unit slightly above your system's total draw for safety and efficiency.
ATX 3.1 & PCIe 5.1
Look for ATX 3.1 compliance if you plan to use newer graphics cards like the RTX 40 series. This standard handles high power transients without voltage drops.
This feature future-proofs your build against upcoming hardware requirements.
Efficiency Rating
Gold efficiency is standard for gaming builds while Platinum offers better savings. Higher ratings mean less heat and lower electricity bills over time.
Prioritize Gold or higher efficiency for best performance and cost efficiency.
Cable Quality
Flexible flat cables make routing easier in cases with tight space constraints. Embossed or sleeved cables offer a cleaner look for visible case designs.
Choose a PSU with flat modular cables for easier installation.
Fan Technology
Fluid Dynamic Bearings offer longer lifespans than sleeve bearings. Zero RPM modes stop the fan during low loads to reduce noise significantly.
Look for FDB or Zero RPM features for quiet long term operation.
Build Protection
Built-in safeguards like OVP and SCP protect components from power surges. Japanese capacitors often indicate better long term stability than standard parts.
Ensure the unit has standard protection suites and quality components.
Warranty
A long warranty period reflects the manufacturer's confidence in their unit. Most high-end models offer 10 years of coverage which provides peace of mind.
Prioritize units with 10-year warranties for long term investment.
How to Use and Care for Your Fully Modular Power Supplies for Gaming Pcs
Always connect only the necessary cables to the unit to avoid strain and keep the case tidy. Use the specific native cables provided for your GPU to ensure stability.
Regularly clean dust from the PSU fan using compressed air to prevent overheating. A clear case panel helps you see dust accumulation inside the chassis.
Ensure the PSU is mounted at the bottom of the case with its fan facing down. This allows it to draw cool air from outside rather than hot internal air.
Frequently Asked Questions
Why choose a fully modular power supply?
Fully modular units let you connect only the cables you need reducing clutter and improving airflow. This simplifies cable management and makes the build look cleaner.
Is ATX 3.1 necessary?
If you use the latest high-power GPUs, ATX 3.1 ensures stability during power spikes. Older units might require adapters for new GPU power connectors.
How do I check wattage needs?
Calculate your CPU and GPU TDP and add at least 150W for other components. This ensures the unit does not run at maximum capacity constantly.
Do modular cables affect performance?
No, quality modular cables perform identically to non-modular ones if they are the same gauge. Ensure you use the cables supplied with the unit.
What is a transient power spike?
It is a sudden brief increase in power draw often caused by modern graphics cards. ATX 3.1 units are built to handle these without shutting down.
How does fan noise impact gaming?
Noise can be distracting during quiet game scenes. Look for units with Zero RPM or low decibel ratings for better immersion.
Final Thoughts on Choosing the Best Fully Modular Power Supplies for Gaming Pcs
The top picks for October 2026 include the Thermaltake GF1 for budget buyers and the CORSAIR RM850x for balanced performance.
Prioritize ATX 3.1 compatibility and cable flexibility if you plan to upgrade your hardware soon. Efficiency ratings like Gold or Platinum also play a key role in system temperatures.
Check current pricing and availability before making a purchase as deals change frequently.