Cooler Master V850 SFX 850W Power Alternatives: 6 Similar Picks Compared

How these alternatives differ from the V850

Cooler Master V750 SFX Gold PCIe 5.1 PSU

The Cooler Master V750 SFX Gold offers 750 watts instead of 850 watts. It shares the same SFX form factor, measuring 4.92 by 2.5 by 3.94 inches. This makes it a direct size match for small builds. It also supports PCIe 5.1, ensuring compatibility with modern graphics cards. The primary difference is the lower wattage output. You choose this unit if you need a single SFX supply rather than a bulk pack. It is ideal for systems that do not require the full 850 watts. The Gold efficiency rating remains consistent with the original model. This option provides a compact footprint without the bulk packaging of the V850 pack.

ASRock PG-850PSF 850W SFX ATX 3.1

The ASRock PG-850PSF maintains the 850-watt output and SFX dimensions of 4.92 by 2.5 by 3.94 inches. It matches the original in physical size and power capacity. The key upgrade is the 80 Plus Platinum efficiency rating, which exceeds the Gold standard of the Cooler Master. It also includes a 10-year warranty, offering longer coverage than typical Gold units. This unit is fully modular and supports ATX 3.1 and PCIe 5.1. You should pick this alternative if you prioritize maximum efficiency and extended warranty support. It is suitable for SFF gaming builds where quiet operation and energy savings are critical. The Platinum certification ensures less power loss during high loads.

MSI MAG 850W Fully Modular ATX Power Supply

The MSI MAG 850W is an ATX unit, not SFX. Its dimensions are 8.75 by 4.92 by 12 inches, making it significantly larger than the 4.92 by 2.5 by 3.94-inch original. It provides the same 850 watts and supports PCIe 5.1 via a 12V-2x6 connector. This unit is fully modular and carries a 10-year warranty. It is not suitable for small form factor cases due to its size. You should choose this alternative for standard ATX desktop builds. It offers robust power for gaming without the constraints of SFX dimensions. The larger size allows for potentially better cooling in spacious cases. It is a budget-friendly option for users who do not need compact ITX power supplies.

Corsair RM850x 850W Fully Modular ATX 3.1 PSU

The Corsair RM850x is an ATX power supply, not SFX. It measures 3.39 by 5.91 by 2.3 inches, which differs from the original SFX dimensions. It delivers 850 watts and supports ATX 3.1 and PCIe 5.1 with a 12V-2x6 connector. This unit is fully modular and designed for standard ATX cases. It is not suitable for small form factor builds requiring SFX dimensions. You should pick this alternative if you have a standard ATX case and need modern PCIe 5.1 support. It provides reliable power for gaming systems. The ATX form factor offers more flexibility in cable management for larger builds. It is a solid choice for users who do not require the compact SFX footprint.

Corsair RM1000x 1000W ATX 3.1 PSU

The Corsair RM1000x provides 1000 watts, which is higher than the 850-watt original. It is an ATX unit, not SFX, with dimensions of 3.39 by 5.91 by 2.3 inches. It supports ATX 3.1 and PCIe 5.1 with a 12V-2x6 connector. This unit is fully modular and designed for standard ATX cases. It is not suitable for small form factor builds. You should choose this alternative if you need higher wattage for demanding systems. It is ideal for users who prioritize power output over compact dimensions. The larger capacity supports high-end components more effectively. It offers modern connectivity standards for future-proofing your build. This unit is best for standard ATX cases where space is not a constraint.

Corsair RM750x Shift White 750W ATX Power Supply

The Corsair RM750x Shift is an ATX power supply, not SFX. It measures 5.91 by 3.39 by 6.3 inches, differing from the original SFX size. It provides 750 watts and supports ATX 3.1 and PCIe 5.1. This unit is fully modular and features side-mounted connectors for easier cable routing. It is not suitable for small form factor cases. You should pick this alternative for standard ATX builds where side-mounted connectors simplify installation. It offers 80 Plus Gold efficiency, matching the original's efficiency rating. The unique connector placement helps manage cables in spacious cases. It is a good choice for users who value organized cable management in standard desktops.

Quick picks

Our 7 picks

1 Best overall

Cooler Master V850 SFX 850W Power Supply

Best for: Small form factor builds needing bulk SFX units

Wattage

850 Watt

ATX Version

ATX 3.1

PCIe Connector Type

12VHPWR

Form Factor

SFX

PCIe Version

PCIe 5.1

Dimensions

3.94 × 4.92 × 2.5 inches

View on Amazon: Cooler Master V850 SFX 850W Power Supply

This is an SFX form factor power supply with 850 watts of output. It supports ATX 3.1 and PCIe 5.1 standards. The unit includes a 90-degree 12VHPWR connector for GPU safety. It measures 4.92 by 2.5 by 3.94 inches. This compact design fits small form factor builds. You get a pack of five units. It suits creators and gamers needing reliable power in tight spaces.

Pros

• 850W output in SFX size
• ATX 3.1 and PCIe 5.1 support
• 90-degree 12VHPWR connector
• Pack of 5 units

Cons

• Heavy at 15.7 pounds
• Sold in packs of 5
• Extended cables may be needed

Good fit if

• You need multiple SFX units
• You build small form factor PCs
• You want PCIe 5.1 readiness

Skip if

• You need a single unit
• You require ATX form factor
• You want a lighter build

Verdict: Cooler Master V850 SFX 850W Gold provides dense power for small builds. It fits users who need bulk SFX supplies for professional or gaming setups.

2 Best premium

Cooler Master V750 SFX Gold PCIe 5.1 PSU

Best for: Compact ITX builds needing PCIe 5.1

Efficiency Rating

Gold

ATX Version

ATX 3.1

PCIe Connector Type

12VHPWR

Form Factor

SFX

PCIe Version

PCIe 5.1

Dimensions

3.94 × 4.92 × 2.5 inches

View on Amazon: Cooler Master V750 SFX Gold PCIe 5.1 PSU

This 750W SFX power supply delivers Gold efficiency for compact builds. It supports ATX 3.1 standards and PCIe 5.1, providing up to 450W to your GPU via a 12VHPWR connector. The 90-degree cable design improves durability and reduces clutter in small form factor cases. It fits users who need reliable high-density power without sacrificing modern connectivity standards.

Pros

• Gold efficiency rating for reliable power delivery
• Supports ATX 3.1 and PCIe 5.1 standards
• 90-degree 12VHPWR connector for improved durability
• Compact SFX form factor for ITX builds

Cons

• 750W output is lower than the 850W alternatives on this list
• Customized short cables may require extensions for larger cases
• SFX size limits airflow potential compared to larger ATX units

Good fit if

• You are building a compact mini-ITX PC
• You need PCIe 5.1 support for modern GPUs
• You prioritize Gold efficiency in a small footprint

Skip if

• You require 850W or higher power output
• You are using a standard ATX case
• You need longer cables without extensions

Verdict: Cooler Master V750 SFX Gold is a solid choice for compact builds needing PCIe 5.1 support. It suits users who value Gold efficiency and a small footprint over maximum wattage.

3 Best 80 plus platinum

ASRock PG-850PSF 850W SFX ATX 3.1

Best for: SFF gaming builds requiring Platinum efficiency

Wattage

850W

Efficiency Rating

80 Plus Platinum, Cybenetics Platinum

Modularity

Fully Modular

ATX Version

ATX 3.1

PCIe Connector Type

12V-2x6

Fan Size

92mm

View on Amazon: ASRock PG-850PSF 850W SFX ATX 3.1

The ASRock PG-850PSF delivers 850W in a compact SFX form factor. It holds 80 Plus Platinum and Cybenetics Platinum efficiency ratings. The unit features ATX 3.1 and PCIe 5.1 support with a native 12V-2x6 connector. A 92mm FDB fan ensures quiet operation under load. Japanese capacitors provide stable power for small-form-factor gaming builds.

Pros

• 80 Plus Platinum and Cybenetics Platinum efficiency certification
• Cybenetics Lambda A++ noise certification for quiet operation
• ATX 3.1 and PCIe 5.1 ready with native 12V-2x6 connector
• 10-year warranty coverage
• Fully modular design with sleeved cables

Cons

• Smaller 92mm fan size compared to standard ATX units
• Higher price point typical of Platinum efficiency ratings
• SFX form factor limits airflow compared to larger PSUs

Good fit if

• You need a high-efficiency power supply for a small-form-factor case
• You want Platinum certification for lower heat output
• You are building a PCIe 5.1 compatible gaming PC

Skip if

• You require an ATX size for a standard tower case
• You are on a strict budget for Gold efficiency
• You prefer a larger 120mm or 140mm fan for silence

Verdict: ASRock PG-850PSF 850W SFX is a high-efficiency choice for SFF builders who need Platinum certification and PCIe 5.1 support without sacrificing quiet operation.

4 Best budget

MSI MAG 850W Fully Modular ATX Power Supply

Best for: Standard ATX gaming desktops

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 MAG 850W Fully Modular ATX Power Supply

The MSI MAG A850GL is a fully modular 850W power supply built for ATX 3.1 systems. It delivers 80 Plus Gold efficiency and supports PCIe 5.1 graphics cards via the 12V-2x6 connector. Measuring 12 inches long, it fits standard mid-tower cases but is bulkier than SFX units. It includes a 10-year warranty, making it a solid option for desktop gaming builds.

Pros

• 80 Plus Gold efficiency rating
• 10-year warranty coverage
• ATX 3.1 and PCIe 5.1 ready
• Fully modular cable design

Cons

• ATX form factor limits use in small ITX cases
• 12-inch length may not fit compact chassis
• Heavier than SFX alternatives

Good fit if

• You need a reliable 850W PSU for a standard ATX case
• You want full modularity for clean cable management
• You require support for next-gen PCIe 5.1 GPUs

Skip if

• You are building a small form factor (SFF) PC
• You need a power supply smaller than 12 inches
• You want a Platinum efficiency rating

Verdict: MSI MAG A850GL 850W ATX is a robust choice for standard desktop gamers who need PCIe 5.1 support and a long warranty, but it is too large for small form factor builds.

5 Also great

Corsair RM850x 850W Fully Modular ATX 3.1 PSU

Best for: Standard ATX cases needing PCIe 5.1

Wattage

850W

Efficiency Rating

Cybenetics Gold

Modularity

Fully Modular

ATX Version

ATX 3.1

PCIe Connector Type

12V-2x6

PCIe Version

PCIe 5.1

View on Amazon: Corsair RM850x 850W Fully Modular ATX 3.1 PSU

The Corsair RM850x is a fully modular ATX power supply rated for 850W. It supports ATX 3.1 and PCIe 5.1 via a 12V-2x6 connector. It holds Cybenetics Gold efficiency certification. The unit measures 2.3 by 3.39 by 5.91 inches and weighs 3.9 pounds. You should choose this if you need standard ATX dimensions and modern connector support for high-end graphics cards.

Pros

• Fully modular cable design
• ATX 3.1 compliant
• Supports PCIe 5.1 with 12V-2x6 connector
• Cybenetics Gold efficiency rating

Cons

• Standard ATX form factor, not SFF
• Heavier than SFX alternatives at 3.9 pounds
• Lacks 80 Plus Platinum certification

Good fit if

• You are building a standard ATX case
• You need PCIe 5.1 support for new GPUs
• You want fully modular cables

Skip if

• You are building an SFF or ITX system
• You require a Platinum efficiency rating
• You need a compact SFX form factor

Verdict: Corsair RM850x ATX 3.1 850W fits users with standard ATX cases who need PCIe 5.1 support. It does not suit SFF builders who need smaller dimensions.

6 Best 1000w

Corsair RM1000x 1000W ATX 3.1 PSU

Best for: High-wattage standard ATX builds

Wattage

1000W

Efficiency Rating

Cybenetics Gold

Modularity

Fully Modular

ATX Version

ATX 3.1

PCIe Connector Type

12V-2x6

PCIe Version

PCIe 5.1

View on Amazon: Corsair RM1000x 1000W ATX 3.1 PSU

This Corsair unit delivers 1000W of power in a standard ATX form factor. It features full modularity and supports the latest ATX 3.1 and PCIe 5.1 standards via a 12V-2x6 connector. The Cybenetics Gold efficiency rating ensures reliable operation. You will appreciate the low-noise design and compact 3.39-inch width. This model suits builders needing high wattage without the constraints of smaller form factors.

Pros

• 1000W output capacity
• Fully modular cable design
• ATX 3.1 compliant
• PCIe 5.1 ready with 12V-2x6 connector
• Cybenetics Gold efficiency rating

Cons

• Standard ATX size may not fit small ITX cases
• Heavier at 6.88 pounds compared to SFX alternatives
• Larger footprint than the 850W SFX units on this list

Good fit if

• You are building a standard ATX tower case
• You need maximum power headroom for high-end GPUs
• You prefer fully modular cables for cleaner builds

Skip if

• You are building a compact SFF or ITX system
• You require a power supply under 3.5 inches in width
• You need a unit lighter than 6 pounds

Verdict: Corsair RM1000x ATX 1000W provides robust 1000W output for standard ATX builds. It fits users who prioritize high wattage and modern PCIe 5.1 support over compact dimensions.

7 Best 750w

Corsair RM750x Shift White 750W ATX Power Supply

Best for: Standard ATX cases needing side-mounted connectors

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

The Corsair RM750x Shift is a 750W ATX power supply with 80 Plus Gold efficiency. It features side-mounted modular connectors for easier cable management and uses a 140mm fan. This unit supports ATX 3.1 and PCIe 5.1 standards. It is suitable for builders who want clean wiring in standard cases. The side connection design helps reduce clutter behind the motherboard.

Pros

• Side-mounted modular connectors for easier access
• 140mm fluid dynamic bearing fan
• ATX 3.1 and PCIe 5.1 support
• Fully modular with micro-fit connectors

Cons

• Standard ATX form factor, not SFX
• Heavier at 3.75 pounds
• Larger dimensions than SFX units

Good fit if

• You need side-mounted connectors for cleaner cable management
• You are building in a standard ATX case
• You want ATX 3.1 compliance for modern GPUs

Skip if

• You are building in a small form factor case
• You require an SFX power supply
• You need a unit under 750W

Verdict: Corsair RM750x Shift 750W ATX suits standard builds where side-mounted connectors simplify cable routing. It is not suitable for small form factor cases requiring SFX dimensions.

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Frequently asked questions