Looking Beyond the PCCOOLER KN850 850W ATX 3.1? 6 Alternatives Worth a Look
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You are looking at pccooler kn850 850w atx 3 1 alternatives because this unit offers solid specs for modern builds. The PCCOOLER KN850 delivers 850W of power with 80 PLUS Gold efficiency and native PCIe 5.1 connectivity. It uses Japanese 105°C capacitors and a 120mm hydraulic fan for stable operation. These features make it a reliable choice for standard ATX cases that need efficient power delivery for high-end GPUs.
However, you might want a different size, color, or warranty length. Some builders prefer white aesthetics or a more compact footprint. Others may need a longer warranty or a specific form factor. The alternatives listed here were chosen because their specs overlap with the original. Each option provides ATX 3.1 compliance and Gold efficiency. They vary in wattage, dimensions, and brand reputation. This list helps you compare those practical differences to find the best fit for your specific build requirements.
Our top pick: PCCOOLER KN850 850W ATX 3.1.
How these alternatives compare
Corsair RM850x Shift 850W White ATX Power Supply
The Corsair RM850x Shift offers the same 850W output and 80 PLUS Gold efficiency as the PCCOOLER KN850. It shares the ATX 3.1 standard and PCIe 5.1 support for modern GPUs. The main difference is aesthetics and form factor. This unit comes in white, which suits builds with white cases or components. It is slightly larger, measuring 6.3 inches in length compared to the KN850’s 5.91 inches. The weight is also higher at 3.75 pounds. You should choose this if you prefer a white color scheme and do not mind the extra depth in your case. It provides the same core performance with a different visual style.
Corsair RM750x Shift White 750W ATX Power Supply
The Corsair RM750x Shift reduces wattage to 750W while maintaining 80 PLUS Gold efficiency and ATX 3.1 compliance. It also features PCIe 5.1 support and a white finish. This unit is identical in size to the 850W Corsair model, measuring 6.3 inches long. The lower wattage makes it suitable for mid-range GPUs that do not require full 850W capacity. You save space and potentially cost by stepping down from 850W. This is a practical choice if your system components draw less power. It offers the same convenient side-mounted connectors and cable management benefits as the higher-wattage Corsair model, just with reduced headroom.
MSI MPG 850W Gold ATX 3.1 Power Supply
The MSI MPG 850G matches the PCCOOLER KN850 in wattage, efficiency, and ATX 3.1 standards. It also includes native PCIe 5.1 connectivity. The key difference is the warranty. The MSI unit provides a 10-year warranty, which is longer than the standard coverage typically associated with the KN850. It shares the same compact dimensions of 5.91 inches in length. The weight is significantly higher at 7.15 pounds, indicating a heavier internal build. You should pick this if long-term reliability and extended warranty coverage are your top priorities. It delivers similar power specs with greater peace of mind for the lifespan of your build.
MSI MAG A750GL PCIE5 750W Power Supply
The MSI MAG A750GL offers 750W of power with 80 PLUS Gold efficiency and ATX 3.1 support. It includes a 12V-2x6 connector for modern GPUs. This unit is much larger than the PCCOOLER KN850, measuring 12 inches in length and 5 inches in height. It is a standard ATX size rather than a compact form factor. The weight is 6.61 pounds. It also comes with a 10-year warranty. You should choose this if you have a large case and need standard dimensions. The extra size allows for different internal layouts. It is a solid alternative for builders who prioritize warranty length and standard sizing over compactness.
darkFlash 850W Fully Modular Gold ATX 3.1 PSU
The darkFlash PMT850 provides 850W of power with 80 PLUS Gold efficiency and ATX 3.1 compliance. It supports PCIe 5.1 for modern graphics cards. The dimensions are very close to the PCCOOLER KN850, measuring 5.52 inches in length and 3.39 inches in height. The weight is not specified, but the form factor is similar. This unit is highlighted for its five-year warranty. You should consider this if you want a compact, black unit with similar power specs. It is a direct competitor in terms of physical size and efficiency. The five-year warranty offers a middle ground between the standard coverage and the longer warranties of some MSI models.
ASRock Steel Legend White 850W ATX 3.1 PSU
The ASRock Steel Legend White 850W matches the PCCOOLER KN850 in wattage, efficiency, and ATX 3.1 standards. It includes a 12V-2x6 connector. The main difference is the white color, which suits white-themed builds. The dimensions are identical to the MSI MPG 850G, measuring 5.91 inches in length and 3.39 inches in height. The weight is 6.59 pounds. This unit is compact and efficient. You should pick this if you need a white power supply with modern connector support. It offers the same core performance as the KN850 but with a different aesthetic. It is a strong option for builders who want to maintain a specific color scheme in their case.
Quick picks
Our 7 picks
PCCOOLER KN850 850W ATX 3.1
Best for: Standard ATX builds with modern GPUs
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6, PCIe 6+2-pin
- Fan Size
- 120mm
View on Amazon: PCCOOLER KN850 850W ATX 3.1 Affiliate link
The PCCOOLER KN850 is an 850W fully modular power supply built for the ATX 3.1 standard. It features 80 PLUS Gold efficiency and a native 12V-2x6 connector for modern graphics cards. Japanese 105°C capacitors and a 120mm fan ensure stable operation. This unit suits builders who need reliable power delivery and clean cable management for high-end systems.
Pros
- ATX 3.1 standard with PCIe 5.1 support
- 80 PLUS Gold efficiency rating
- Fully modular design with native 12V-2x6 cable
- Japanese 105°C capacitors for stability
Cons
- Smaller 120mm fan size compared to typical 135mm or 140mm units
- Standard 5.91-inch length may not fit very small cases
- Black color only available
Good fit if
- You are building a system with an ATX 3.1 compatible GPU
- You want fully modular cables for a clean build
- You need 80 PLUS Gold efficiency for power savings
Skip if
- You require a 135mm or larger fan for silent operation
- You are using a mini-ITX case with strict length limits
- You prefer a white power supply for matching aesthetics
Verdict: The PCCOOLER KN850 850W ATX 3.1 is a solid choice for standard ATX cases needing modern GPU support. It fits users who prioritize efficiency and native PCIe 5.1 connectivity over larger fan sizes or specific color schemes.
Corsair RM850x Shift 850W White ATX Power Supply
Best for: White-themed modern gaming builds
- Wattage
- 850W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- PCIe 5.1
- Dimensions
- 6.3 × 5.91 × 3.39 inches
View on Amazon: Corsair RM850x Shift 850W White ATX Power Supply Affiliate link
The Corsair RM850x Shift is a fully modular 850W power supply built for modern systems. It meets the ATX 3.1 standard and supports PCIe 5.1 connectors for high-end graphics cards. The unit carries an 80 Plus Gold efficiency rating. It measures 6.3 by 5.91 by 3.39 inches and weighs 3.75 pounds. This compact design suits builds with limited space.
Pros
- 80 Plus Gold efficiency rating
- ATX 3.1 compliance
- PCIe 5.1 connector support
- Fully modular cable design
Cons
- White color limits dark case compatibility
- 3.75 pounds weight adds bulk
- Compact form factor may restrict airflow in tight cases
Good fit if
- You need PCIe 5.1 support for new GPUs
- You want a white build theme
- You prefer fully modular cables
Skip if
- You need a black power supply
- You require a 1000W or higher rating
- You want a standard non-shift form factor
Verdict: Corsair RM850x Shift 850W ATX 3.1 fits users building white-themed PCs with modern GPUs. It delivers reliable power and efficient operation for high-end gaming rigs.
Corsair RM750x Shift White 750W ATX Power Supply
Best for: clean cable management in mid-range builds
- Wattage
- 750W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- Fan Size
- 140mm
- PCIe Version
- PCIe 5.1
View on Amazon: Corsair RM750x Shift White 750W ATX Power Supply Affiliate link
This Corsair unit delivers 750W of power with an 80 Plus Gold efficiency rating. It features side-mounted modular connectors and micro-fit cables for cleaner cable management. The 140mm fan supports quiet operation at low loads. It is certified for ATX 3.1 and PCIe 5.1 standards. This design suits builders who prioritize compact cable routing and reliable power delivery for mid-range systems.
Pros
- 750W output with 80 Plus Gold efficiency
- Side-mounted modular connections for easier access
- 140mm fluid dynamic bearing fan for low noise
- ATX 3.1 and PCIe 5.1 certified
Cons
- 750W capacity is lower than the 850W options on this list
- Slightly larger physical dimensions compared to some compact competitors
- White color may not suit all custom build themes
Good fit if
- You need side-mounted connectors for cleaner cable management
- You want 80 Plus Gold efficiency for better power savings
- You are building a system with PCIe 5.1 components
Skip if
- You require 850W or higher wattage for extreme builds
- You prefer a black power supply to match dark cases
- You need the smallest possible form factor for tight cases
Verdict: Corsair RM750x Shift 750W ATX 3.1 offers reliable power delivery with convenient side-mounted connectors. It is a practical choice for users who value cable management ease and moderate wattage for modern GPUs.
MSI MPG 850W Gold ATX 3.1 Power Supply
Best for: Compact high-end gaming builds
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
View on Amazon: MSI MPG 850W Gold ATX 3.1 Power Supply Affiliate link
This fully modular 850W unit meets ATX 3.1 and PCIe 5.1 standards. It uses native 12V-2x6 cables for modern GPUs. The build includes 100% Japanese 105°C capacitors for stability. You get 80 Plus Gold efficiency. The compact dimensions fit smaller cases. It carries a 10-year warranty for long-term reliability.
Pros
- Native 12V-2x6 PCIe connector
- ATX 3.1 and PCIe 5.1 support
- 100% Japanese 105°C capacitors
- 80 Plus Gold efficiency
- 10-year warranty
Cons
- Heavier at 7.15 pounds
- No mention of software control
- Higher price point than base models
Good fit if
- You need native 12V-2x6 support
- You want a compact 850W unit
- You prioritize Japanese capacitors
Skip if
- You need software customization
- You prefer a lighter unit
- You want a lower cost option
Verdict: MSI MPG A850G 850W ATX 3.1 fits builders who need a compact, reliable power supply with modern connector support. It is ideal for high-end gaming rigs that require stable power delivery.
MSI MAG A750GL PCIE5 750W Power Supply
Best for: mid-range gaming builds needing modern connectors
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
View on Amazon: MSI MAG A750GL PCIE5 750W Power Supply Affiliate link
The MSI MAG A750GL is a fully modular 750W power supply designed for gaming systems. It meets ATX 3.1 and PCIe 5.1 standards, featuring a 12V-2x6 connector for modern graphics cards. The unit carries an 80 PLUS Gold efficiency rating and includes a 10-year warranty. Its compact dimensions make it suitable for smaller cases, though it weighs 6.61 pounds. This model suits users needing reliable power for mid-range builds.
Pros
- 80 PLUS Gold efficiency certification
- ATX 3.1 and PCIe 5.1 compliance
- 10-year limited warranty
- Fully modular cable design
Cons
- Lower 750W output compared to 850W alternatives
- Heavier build at 6.61 pounds
- Standard black color option only
Good fit if
- You need ATX 3.1 compatibility for new GPUs
- You want a 10-year warranty for longevity
- You are building a mid-range gaming PC
Skip if
- You require 850W or higher wattage
- You prefer white power supplies for aesthetics
- You need ultra-compact dimensions under 10 inches
Verdict: MSI MAG A750GL 750W ATX 3.1 fits users who prioritize warranty length and modern connector standards over maximum wattage. It is a solid choice for builders who do not need the extra headroom of an 850W unit.
darkFlash 850W Fully Modular Gold ATX 3.1 PSU
Best for: modern gaming builds with PCIe 5.1
- Wattage
- 850 Watts
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6, 12VHPWR
- Warranty
- 5 Year
View on Amazon: darkFlash 850W Fully Modular Gold ATX 3.1 PSU Affiliate link
The darkFlash PMT850 is an 850W fully modular power supply built for ATX 3.1 systems. It features 80 Plus Gold efficiency and native 12V-2x6 connectors for PCIe 5.1 GPUs. The unit uses Japanese 105°C capacitors for stability. It supports significant power excursions for high-end components. This PSU suits gamers who want modern compatibility and a five-year warranty.
Pros
- ATX 3.1 and PCIe 5.1 ready
- 80 Plus Gold efficiency rating
- Native 12V-2x6 cable included
- 5-year warranty coverage
- Japanese 105°C capacitors
Cons
- Standard ATX form factor size
- Black color only option
- No display or monitoring features
Good fit if
- You need native PCIe 5.1 support
- You want a 5-year warranty
- You prefer fully modular cables
Skip if
- You require a compact SFX form factor
- You need a white color option
- You want digital monitoring displays
Verdict: The darkFlash PMT850 850W ATX 3.1 delivers reliable power for modern GPUs with a solid five-year warranty. It fits users building high-performance gaming rigs who prioritize efficiency and cable management.
ASRock Steel Legend White 850W ATX 3.1 PSU
Best for: Compact ATX 3.1 builds with white aesthetics
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Gold, Cybenetics Platinum
- Modularity
- Full Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 135 mm
View on Amazon: ASRock Steel Legend White 850W ATX 3.1 PSU Affiliate link
The ASRock Steel Legend White Edition SL-850GW is an 850W ATX 3.1 power supply with a fully modular design. It features a 135 mm FDB fan and 80 PLUS Gold efficiency. The unit includes a 12V-2x6 PCIe 5.1 connector and offers a 10-year warranty. Its compact dimensions make it suitable for smaller cases. You should consider this unit if you need reliable power delivery with a white aesthetic.
Pros
- 80 PLUS Gold efficiency rating
- 135 mm FDB fan for cooling
- 10-year global warranty
- Fully modular cable management
Cons
- 12V-2x6 connector type may require adapters for older PCIe 4.0 GPUs
- Not compatible with all built-in computers or systems
- White color limits use in non-white builds
Good fit if
- You need an 850W ATX 3.1 power supply
- You want a fully modular design for clean cable management
- You prefer a white color scheme for your build
Skip if
- You require a 12VHPWR connector instead of 12V-2x6
- You are building a system with limited case space smaller than 5.91 inches
- You need a power supply compatible with all built-in computers
Verdict: ASRock Steel Legend White 850W provides solid efficiency and a long warranty for builders seeking a compact, white ATX 3.1 unit.
Specifications side by side
| Spec | PCCOOLER KN850 850W ATX 3.1 | Corsair RM850x Shift 850W White ATX Power Supply | Corsair RM750x Shift White 750W ATX Power Supply | MSI MPG 850W Gold ATX 3.1 Power Supply | MSI MAG A750GL PCIE5 750W Power Supply | darkFlash 850W Fully Modular Gold ATX 3.1 PSU | ASRock Steel Legend White 850W ATX 3.1 PSU |
|---|---|---|---|---|---|---|---|
| Wattage | 850W | 850W | 750W | 850W | 750W | 850 Watts | 850W |
| Efficiency Rating | 80 PLUS Gold | 80 Plus Gold | 80 Plus Gold | 80+ Gold | 80 PLUS Gold | 80 Plus Gold | 80 PLUS Gold, Cybenetics Platinum |
| Modularity | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Full Modular |
| ATX Version | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | 12V-2x6, PCIe 6+2-pin | PCIe 5.1 | not stated | 12V-2x6 | 12V-2x6 | 12V-2x6, 12VHPWR | 12V-2x6 |
| Fan Size | 120mm | not stated | 140mm | not stated | not stated | not stated | 135 mm |
| Warranty | 5-year | not stated | not stated | 10 Year | 10 Year | 5 Year | 10 Years |
| Form Factor | ATX | ATX | ATX | Compact | Compact | Compact | ATX |
| PCIe Version | not stated | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | not stated |
| Recommended Use | not stated | not stated | not stated | Gaming | Gaming | Gaming | not stated |
| Connector | 12V-2x6 Connector | not stated | not stated | 12V-2x6 Connector | 12V-2x6 Connector | not stated | 12V-2x6 Connector |
| Size | 850 Watts | 850W | 750W | 850W | 750W (PCIE 5) | 850 Watts | 850W |
| Dimensions | 5.91 × 5.51 × 3.35 inches | 6.3 × 5.91 × 3.39 inches | 6.3 × 5.91 × 3.39 inches | 5.91 × 5.91 × 3.39 inches | 12 × 9 × 5 inches | 5.52 × 5.9 × 3.39 inches | 5.91 × 5.91 × 3.39 inches |
| Weight | 3.3 pounds | 3.75 pounds | 3.75 pounds | 7.15 pounds | 6.61 pounds | not stated | 6.59 pounds |
| Color | Black | White | White | not stated | Black | Black | Multicolor |
| Model | KN850 | not stated | CP-9020273-NA | MPG A850G PCIE 5 | 306-7ZP8B11-CE0 | PMT850 | SL-850GW |
If you are looking beyond the PCCOOLER KN850, consider superun 3 in 1 walking alternatives for other options.
Frequently asked questions
Is the PCCOOLER KN850 compatible with PCIe 5.1 GPUs?
Yes, the PCCOOLER KN850 supports native PCIe 5.1 connectivity. It meets the ATX 3.1 standard, which ensures it includes the necessary 12V-2x6 connectors for modern graphics cards. This allows you to connect high-end GPUs without needing messy adapters.
What is the size difference between the Corsair RM850x Shift and the PCCOOLER KN850?
The Corsair RM850x Shift is slightly larger than the PCCOOLER KN850. The Corsair measures 6.3 inches in length, while the PCCOOLER is 5.91 inches long. The Corsair is also wider at 5.91 inches compared to the PCCOOLER’s 5.51 inches. Check your case clearance before choosing.
Can I use the Corsair RM750x Shift for a high-end gaming PC?
The Corsair RM750x Shift offers 750W of power with ATX 3.1 and PCIe 5.1 support. It is designed for mid-range builds where cable management is a priority. You should verify that 750W meets your system’s peak power requirements before relying on it for high-end gaming rigs.
Does the MSI MPG 850W Gold support the new 12V-2x6 connector?
Yes, the MSI MPG 850W Gold includes a 12V-2x6 connector. It adheres to the ATX 3.1 standard and supports PCIe 5.1. This native support allows you to power modern graphics cards directly, ensuring stable performance without the need for external adapter cables.
How does the MSI MAG A750GL compare in size to the PCCOOLER KN850?
The MSI MAG A750GL is significantly larger than the PCCOOLER KN850. The MSI unit measures 12 inches in length and 9 inches in width. The PCCOOLER KN850 is much more compact at 5.91 inches long and 5.51 inches wide. Ensure your case can accommodate the MSI dimensions.
Is the darkFlash 850W PSU suitable for modern gaming builds?
Yes, the darkFlash 850W is built for modern gaming builds. It features ATX 3.1 compliance and PCIe 5.1 support for new GPUs. The unit provides 850 Watts of power with 80 PLUS Gold efficiency. It is a practical choice for users prioritizing efficiency and cable management in their setup.
What makes the ASRock Steel Legend White different from other options?
The ASRock Steel Legend White offers a distinct multicolor aesthetic with 80 PLUS Gold efficiency. It provides 850W of power and supports the ATX 3.1 standard. The unit includes a 12V-2x6 connector for modern GPUs. Its compact size of 5.91 inches fits well in standard ATX cases.