Looking Beyond the GAMEMAX SFX Power Supply 750W? 6 Alternatives Worth a Look
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You are looking at gamemax sfx power supply 750w alternatives because your build requirements may differ from the original model. The GAMEMAX SFX 750W Gold PSU offers full modularity and ATX 3.0 readiness in a compact SFX form factor. It delivers 80 Plus Gold efficiency and includes robust protection features like over-voltage and short-circuit safeguards. These specs make it ideal for small form factor gaming rigs that need high power density.
However, you might prefer a different size, wattage, or brand. Some builders need standard ATX cases for better airflow or easier cable management. Others require higher wattage for future-proofing or specific color matches for their chassis. This guide presents 6 alternatives chosen because their specifications overlap with the original. Each option shares key attributes like full modularity and high efficiency ratings. You can compare these models to find the best fit for your specific case dimensions and component list.
Comparing these SFX and ATX options
GAMEMAX GS Series 650W SFX PSU
The GAMEMAX GS Series 650W SFX PSU keeps the same compact SFX form factor and 80 Plus Gold efficiency as the 750W model. It is fully modular, matching the original’s cable management flexibility. The main difference is power output. This unit provides 650W instead of 750W. You should choose this if your components require less than 650W. It saves space and money if you do not need the extra headroom. The design remains identical, so fit and airflow characteristics stay the same. It is ideal for small builds that prioritize efficiency over maximum wattage.
GAMEMAX 850W SFX Gold Power Supply
The GAMEMAX 850W SFX Gold Power Supply offers higher wattage while maintaining the compact SFX form factor. It is fully modular and delivers 80 Plus Gold efficiency, just like the 750W model. The key upgrade is the 850W capacity, which supports more power-hungry components. You should pick this if your GPU or CPU demands more than 750W. It also comes in white, offering a different aesthetic option. The size remains small, fitting into the same cases. This is the best choice for compact builds requiring maximum power density without switching to a larger ATX form factor.
MSI MAG 850W Fully Modular ATX Power Supply
The MSI MAG 850W Fully Modular ATX Power Supply switches from SFX to standard ATX form factor. It provides 850W, which is 100W more than the original. It is fully modular and 80 Plus Gold certified. This unit supports ATX 3.1 and PCIe 5.1 standards, offering newer connector compatibility. It includes a 10-year warranty, which is longer than typical SFX offerings. You should choose this if you have a standard ATX case and need more power. It sacrifices compact size for higher wattage and extended warranty coverage. It is best for standard towers, not small form factor builds.
Corsair RM1000e 1000W ATX Power Supply
The Corsair RM1000e 1000W ATX Power Supply offers significantly higher wattage than the GAMEMAX 750W. It uses standard ATX form factor, so it will not fit in SFX cases. It is fully modular and 80 Plus Gold efficient. The 1000W output supports high-end components that exceed the 750W limit. You should pick this if you need maximum power headroom in a standard case. It provides robust power for future upgrades. The larger size allows for better airflow and cooling potential. It is ideal for users who prioritize wattage and standard sizing over compactness.
Corsair RM850x Shift 850W White ATX Power Supply
The Corsair RM850x Shift 850W White ATX Power Supply provides 850W in a standard ATX form factor. It is fully modular and 80 Plus Gold efficient. This unit supports ATX 3.1 and PCIe 5.1, offering modern connector support. It comes in white, matching the aesthetic of some builds. You should choose this if you need more power than 750W and have a standard case. It sacrifices the compact SFX size for higher wattage and newer standards. It is best for standard towers requiring robust power delivery and color coordination. It does not fit in small form factor chassis.
MSI MAG ATX 3.0 Modular Power Supply
The MSI MAG ATX 3.0 Modular Power Supply offers 750W in a standard ATX form factor. It is fully modular and 80 Plus Gold efficient, matching the original’s efficiency rating. This unit supports ATX 3.0 and PCIe 5.0, providing similar modern connector readiness. It is designed for gaming in standard cases. You should pick this if you have an ATX case and want PCIe 5.0 support. It provides the same wattage but in a larger, more common form factor. It is ideal for users who prioritize standard sizing and efficiency over compact SFX dimensions.
Quick picks
Our 7 picks
GAMEMAX SFX 750W Gold PSU
Best for: Compact builds needing 750W efficiency
- Wattage
- 750W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Full Modular
- ATX Version
- ATX 3.0
- Form Factor
- SFX
This GAMEMAX SFX power supply delivers 750W of power in a compact form factor. It features full modularity and 80 Plus Gold certification for high efficiency. The unit supports ATX 3.0 and PCIe 5.0 standards. It uses Japanese capacitors and an FDB fan for stability. You should consider this if you need a reliable, efficient power source for small form factor builds.
Pros
- 80 Plus Gold efficiency rating
- Full modular cable design
- ATX 3.0 and PCIe 5.0 ready
- Japanese 105°C capacitors
Cons
- Smaller 750W capacity than 850W alternatives
- 12VHPWR cable not included
- SFX form factor limits compatibility with standard cases
Good fit if
- You need a compact SFX power supply
- You want 80 Plus Gold efficiency
- You are building an ATX 3.0 compatible system
Skip if
- You require a standard ATX form factor
- You need more than 750W of power
- You want the 12VHPWR cable included
Verdict: GAMEMAX SFX 750W Gold PSU is a solid choice for small form factor builds needing high efficiency. It fits users who prioritize compact size and modern PCIe 5.0 support over higher wattage options.
GAMEMAX GS Series 650W SFX PSU
Best for: Small form factor builds under 650W
- Wattage
- 650W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Full Modular
- Form Factor
- SFX
This GAMEMAX unit is a fully modular SFX power supply rated at 650W. It carries an 80 Plus Gold efficiency certification. The compact SFX form factor fits small form factor cases where space is tight. You get full modularity to manage cable clutter. This model suits builders who need reliable power for mid-range components in a small chassis.
Pros
- 650W output capacity
- 80 Plus Gold efficiency rating
- Fully modular cable design
- Compact SFX form factor
Cons
- Lower 650W wattage compared to 750W and 850W alternatives
- SFX size limits airflow compared to larger ATX units
- No mention of ATX 3.0 or PCIe 5.0 native support
Good fit if
- You are building in a small form factor case
- You need 80 Plus Gold efficiency for lower heat
- You want to reduce cable clutter with full modularity
Skip if
- You require higher than 650W power output
- You need native PCIe 5.0 connectors for new GPUs
- You prefer standard ATX size for better airflow
Verdict: GAMEMAX SFX 650W Gold PSU is a solid choice for small builds that do not exceed 650W. It fits users prioritizing efficiency and compact size over raw power headroom.
GAMEMAX 850W SFX Gold Power Supply
Best for: compact high-wattage builds
- Wattage
- 850W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Full Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- 12VHPWR
- Form Factor
- SFX
This GAMEMAX SFX unit delivers 850W of power in a compact form factor. It carries an 80 Plus Gold efficiency rating and supports ATX 3.0 standards. The design includes a 12VHPWR connector for modern graphics cards. Japanese capacitors aim for stable performance under load. It suits users needing high wattage in small cases.
Pros
- 850W output capacity
- 80 Plus Gold efficiency
- ATX 3.0 and PCIe 5.0 ready
- Includes 12VHPWR connector
- Full modular cable design
Cons
- Higher wattage may exceed small case limits
- SFX form factor restricts airflow options
- No mention of fan speed control settings
Good fit if
- You need high power in a small case
- You have a PCIe 5.0 graphics card
- You want full modular flexibility
Skip if
- You require standard ATX size
- You need lower wattage than 850W
- You prefer silent operation without fan specs
Verdict: GAMEMAX SFX 850W Gold PSU fits builders who need maximum power in a small chassis. It supports modern GPU connectors and offers efficient energy use for compact gaming rigs.
MSI MAG 850W Fully Modular ATX Power Supply
Best for: Standard ATX cases with PCIe 5.1 GPUs
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
This is an 850W fully modular power supply built for modern gaming rigs. It supports ATX 3.1 and PCIe 5.1 standards with a 12V-2x6 connector. The unit holds an 80 Plus Gold efficiency rating and includes a 10-year warranty. You get a reliable power source for high-end components without needing extra adapters for new GPUs.
Pros
- 850W output capacity
- ATX 3.1 compliance
- 12V-2x6 PCIe connector
- 10-year warranty
Cons
- ATX form factor is larger than SFX units
- Physical dimensions require more case space
- Not suitable for small form factor builds
Good fit if
- You need ATX 3.1 native support
- You have a standard ATX case
- You want a 10-year warranty
Skip if
- You are building an SFX case
- You need a compact 120mm width unit
- You require a smaller form factor
Verdict: MSI MAG A850GL 850W ATX 3.1 PSU is a solid choice for standard ATX cases needing PCIe 5.1 readiness. It fits users who prioritize long-term warranty coverage and modern connector standards over space saving.
Corsair RM1000e 1000W ATX Power Supply
Best for: high-wattage standard ATX builds
- Wattage
- 1000 Watt
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- Form Factor
- ATX
- Size
- 1000W
- Dimensions
- 5.91 × 5.51 × 3.39 inches
This Corsair unit delivers 1000 watts of power in a standard ATX form factor. It features full modularity and 80 PLUS Gold efficiency. The build includes dual EPS12V connectors and low-noise operation. It suits users needing high wattage for standard desktop cases rather than compact SFX builds. The 105°C-rated capacitors support stable performance under load.
Pros
- 1000W output capacity
- Fully modular cable design
- 80 PLUS Gold efficiency rating
- Dual EPS12V connectors
Cons
- Standard ATX size does not fit SFX cases
- Heavier at 3.66 pounds
- Larger dimensions than compact alternatives
Good fit if
- You need 1000W for high-end GPUs
- You use standard ATX mid-tower cases
- You want fully modular cables
Skip if
- You have a small form factor case
- You need SFX dimensions
- You require under 850W
Verdict: Corsair RM1000e 1000W ATX PSU fits users with standard cases who need maximum wattage. It is not suitable for compact SFX builds.
Corsair RM850x Shift 850W White ATX Power Supply
Best for: Standard ATX builds needing 850W
- 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
The Corsair RM850x Shift is a fully modular ATX power supply rated at 850W with 80 Plus Gold efficiency. It supports the latest ATX 3.1 standard and PCIe 5.1 connectors. The unit measures 6.3 by 3.39 by 5.91 inches and weighs 3.75 pounds. It features a white finish and zero RPM fan mode. This model suits builders needing high wattage in a standard ATX form factor.
Pros
- 850W output capacity
- Fully modular cable design
- ATX 3.1 and PCIe 5.1 support
- 80 Plus Gold efficiency rating
- White color finish
Cons
- Standard ATX form factor limits use in small cases
- Heavier build at 3.75 pounds
- Lacks the compact SFX dimensions found in other list options
Good fit if
- You need 850W for high-end GPUs
- You prefer a white build aesthetic
- You have a standard ATX case
Skip if
- You are building in a small form factor case
- You need an SFX power supply
- You require a lower wattage unit
Verdict: Corsair RM850x Shift ATX 3.1 provides robust 850W power for standard towers. It fits users who prioritize modern connector standards and color matching over compact size.
MSI MAG ATX 3.0 Modular Power Supply
Best for: Standard ATX cases needing PCIe 5.0 support
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Full Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- PCIe 5.0
- Fan Size
- 120mm
- Recommended Use
- Gaming
This MSI MAG A750GL is a 750W ATX 3.0 power supply designed for modern gaming builds. It features full modularity and 80 Plus Gold efficiency. The unit includes a native PCIe 5.0 connector, which simplifies connections for NVIDIA GeForce RTX 40 Series graphics cards. It uses a 120mm fan and offers standard industrial protections. This model suits users who need reliable power for high-end GPUs in standard ATX cases.
Pros
- ATX 3.0 standard with native PCIe 5.0 connector
- 80 Plus Gold efficiency rating
- Full modular design with flat cables
- Supports NVIDIA GeForce RTX 40 Series GPUs
Cons
- Larger dimensions than SFX units
- Sold as a renewed item
- 120mm fan may be louder than smaller fans
Good fit if
- You need a native PCIe 5.0 cable for an RTX 40 series card
- You build in standard ATX cases
- You want 80 Plus Gold efficiency
Skip if
- You are building in a small form factor case
- You prefer new inventory over renewed products
- You need a 120mm fan to remain silent
Verdict: MSI MAG A750GL ATX 3.0 750W PSU is a solid choice for standard ATX builds requiring PCIe 5.0 support. It fits users who prioritize efficiency and modern connector standards over compact size.
Specifications side by side
| Spec | GAMEMAX SFX 750W Gold PSU | GAMEMAX GS Series 650W SFX PSU | GAMEMAX 850W SFX Gold Power Supply | MSI MAG 850W Fully Modular ATX Power Supply | Corsair RM1000e 1000W ATX Power Supply | Corsair RM850x Shift 850W White ATX Power Supply | MSI MAG ATX 3.0 Modular Power Supply |
|---|---|---|---|---|---|---|---|
| Wattage | 750W | 650W | 850W | 850W | 1000 Watt | 850W | not specified |
| Efficiency Rating | 80 Plus Gold | 80 Plus Gold | 80 Plus Gold | 80+ Gold | 80 PLUS Gold | 80 Plus Gold | 80 Plus Gold |
| Modularity | Full Modular | Full Modular | Full Modular | Fully Modular | Fully Modular | Fully Modular | Full Modular |
| ATX Version | ATX 3.0 | not specified | ATX 3.0 | ATX 3.1 | not specified | ATX 3.1 | ATX 3.0 |
| PCIe Connector Type | not specified | not specified | 12VHPWR | 12V-2x6 | not specified | PCIe 5.1 | PCIe 5.0 |
| Fan Size | not specified | not specified | not specified | not specified | not specified | not specified | 120mm |
| Warranty | not specified | not specified | not specified | 10 Year | not specified | not specified | not specified |
| Form Factor | SFX | SFX | SFX | ATX | ATX | ATX | ATX |
| PCIe Version | not specified | not specified | not specified | PCIe 5.1 | not specified | PCIe 5.1 | not specified |
| Recommended Use | not specified | not specified | not specified | Gaming | not specified | not specified | Gaming |
| Connector | not specified | not specified | not specified | 12V-2x6 Connector | not specified | not specified | not specified |
| Size | not specified | not specified | 850W | 850W (PCIE 5) | 1000W | 850W | not specified |
| Dimensions | not specified | not specified | not specified | 12 × 8.75 × 4.92 inches | 5.91 × 5.51 × 3.39 inches | 6.3 × 5.91 × 3.39 inches | 11.8 × 7.9 × 3.9 inches |
| Weight | not specified | not specified | not specified | not specified | 3.66 pounds | 3.75 pounds | 3.97 pounds |
| Color | BLACK | not specified | WHITE | not specified | Black | White | not specified |
If your build also requires compact storage, you can compare drive specs through sp silicon power silicon power alternatives.
Frequently asked questions
Is the GAMEMAX SFX 750W Gold PSU fully modular?
Yes, the GAMEMAX SFX 750W Gold PSU is fully modular. This means you can connect only the cables your build requires. It helps keep cable clutter low in compact cases. The unit also features 80 Plus Gold efficiency and an SFX form factor for small builds.
Can I use an SFX power supply in a standard ATX case?
You can use an SPS in an ATX case, but it may not fit all mounts. The GAMEMAX SFX 750W and 650W models are designed for small form factors. For standard ATX cases, consider the MSI MAG 850W or Corsair RM1000e, which are built for larger chassis and offer different power options.
What is the difference between the GAMEMAX 750W and 850W SFX models?
The primary difference is power output. The 750W model suits builds needing moderate power in a compact size. The 850W model provides more headroom for high-end components. Both are fully modular, 80 Plus Gold certified, and use the SFX form factor. The 850W version is available in white.
Does the MSI MAG 850W support PCIe 5.1 GPUs?
Yes, the MSI MAG 850W ATX PSU supports PCIe 5.1. It includes a 12V-2x6 connector for modern graphics cards. This model is fully modular and meets 80 Plus Gold efficiency standards. It is designed for standard ATX cases rather than compact SFX builds.
Which alternative offers the highest wattage for standard ATX builds?
The Corsair RM1000e offers 1000W of power for standard ATX builds. It is fully modular and 80 Plus Gold certified. This unit is larger than SFX options, making it unsuitable for compact cases. It provides maximum wattage for users who need significant power headroom in a standard chassis.
Is the Corsair RM850x Shift compatible with ATX 3.1 standards?
Yes, the Corsair RM850x Shift is compatible with ATX 3.1 standards. It delivers 850W of power and is fully modular. The unit supports PCIe 5.1 for modern GPUs. It is available in white and is designed for standard ATX cases, not compact SFX form factors.
What efficiency rating do these GAMEMAX SFX power supplies have?
All listed GAMEMAX SFX models, including the 650W, 750W, and 850W versions, hold an 80 Plus Gold efficiency rating. This indicates high energy efficiency during operation. Each model is also fully modular, allowing you to manage cables effectively in small form factor builds.
Does the MSI MAG ATX 3.0 support PCIe 5.0?
Yes, the MSI MAG ATX 3.0 Modular PSU supports PCIe 5.0. It is designed for standard ATX cases and offers 750W of power. The unit is fully modular and 80 Plus Gold certified. It is suitable for gaming builds that require modern connector standards without the need for compact sizing.