ASRock vs Montech PC Power Supplies: Which Brand Fits You?
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
When comparing the ASRock vs montech PC power supply options, you find two 750W units that both support ATX 3.1 and PCIe 5.1 standards. They share an 80 PLUS Gold efficiency rating and a 12V-2x6 connector. The main difference lies in their physical footprint and feature sets. ASRock offers a square form factor with advanced cable management features, while Montech provides a standard rectangular size with a larger silent fan. You need to check which dimensions fit your case best.
Key differences
| Aspect | ASRock Phantom Gaming 750W ATX 3.1 Power Supply | Montech Gamma II 750W Gold Power Supply |
|---|---|---|
| Dimensions | 5.91 x 5.91 x 3.39 inches | 10 x 2 x 2.7 inches |
| Efficiency Certification | 80 PLUS Gold, Cybenetics Platinum | 80 PLUS Gold |
| Fan Size | Not listed | 135mm |
| Cable Features | Individual braided pattern, NTC sensor | Not listed |
| Warranty | 10 Years | 10-year |
Which one should you choose?
Choose ASRock Phantom Gaming 750W ATX 3.1 Power Supply if
- You prefer a compact square form factor that fits smaller cases
- You want individual braided cables with an NTC sensor for durability
- You need Cybenetics Platinum certification alongside 80 PLUS Gold
Choose Montech Gamma II 750W Gold Power Supply if
- You want a standard rectangular size for maximum compatibility
- You prefer a larger 135mm fan for potentially quieter operation
- You need 100% Japanese capacitors for component reliability
Verdict: Choose the ASRock Phantom Gaming if you prioritize a compact square design and advanced cable features. Select the Montech Gamma II if you prefer a standard rectangular size with a larger silent fan. Both units offer reliable 750W performance for modern gaming builds.
ASRock vs Montech PSU Comparison
efficiency rating
Both the ASRock Phantom Gaming and the Montech Gamma II carry the 80 PLUS Gold certification. This means you can expect high energy efficiency during typical loads, reducing wasted heat and electricity. The ASRock model goes a step further by also holding a Cybenetics Platinum rating, which is a stricter independent standard. This dual certification suggests potentially better performance at specific load points compared to the Montech, which lists only the 80 PLUS Gold badge. For most users, both are excellent choices, but the ASRock offers an extra layer of verified efficiency data.
form factor
Physical size matters for case compatibility. The ASRock unit measures 5.91 by 5.91 by 3.39 inches, following a standard square footprint with a thicker profile. The Montech Gamma II is significantly different, measuring 10 inches in length but only 2 inches in width and 2.7 inches in height. This slim, long design allows the Montech to fit into smaller cases where a standard thick unit would not. If you have a compact chassis, the Montech’s unique dimensions provide a clear advantage in fitment flexibility.
modularity
Both power supplies are fully modular, meaning you connect only the cables you need. This keeps your case interior clean and improves airflow. The ASRock specifies individual braided cables, which are durable and easier to manage. The Montech also offers full modularity but does not specify the cable material in the provided data. Since both allow you to remove unused cables, the functional benefit is identical. You get the same cable management freedom from either brand, making this a neutral point for your build.
atx version
Both units support the latest ATX 3.1 specification. This standard ensures compatibility with modern motherboards and power delivery requirements. It also includes native support for the new PCIe 5.1 standard, which uses the 12V-2x6 connector for graphics cards. This connector is safer and easier to plug in than older 12VHPDR cables. Since both the ASRock and Montech models adhere to this current standard, you do not need to worry about backward compatibility or future-proofing issues with your components.
warranty
Warranty length provides peace of mind for long-term use. The ASRock Phantom Gaming comes with a global 10-year warranty. The Montech Gamma II also offers a 10-year warranty. Both brands stand behind their products for a decade. This equal coverage means your investment is protected for the same duration. You do not gain any additional security by choosing one over the other based on warranty terms alone. Both are solid choices for longevity.
fan technology
Cooling differs between the two units. The Montech Gamma II features a 135mm FDB fan with a zero RPM mode. This means the fan stops completely during low loads, resulting in silent operation. The ASRock uses iCOOL intelligent fan control but does not explicitly list a zero RPM mode in the data. A silent fan can reduce noise significantly in quiet builds. If you prioritize absolute silence at low loads, the Montech’s specific fan technology offers a practical advantage.
Which ASRock or Montech PSU fits you
Builder with small case constraints
The Montech Gamma II measures 2 inches in height, making it a better fit for compact chassis where space is tight. The ASRock unit is wider at 5.91 inches, which may not fit in smaller cases. Choose Montech for physical compatibility.
User wanting advanced fan control
The ASRock Phantom Gaming includes iCOOL Intelligent Fan Control Mode for dynamic speed adjustments. It also features an NTC sensor on the PCIe 5.1 cable for thermal monitoring. These specific features are not listed for the Montech Gamma II.
Builder prioritizing component quality
The Montech Gamma II uses 100% Japanese capacitors, which are often preferred for long-term stability and reliability. The ASRock specifications do not mention capacitor origins. If you value this specific component detail, the Montech unit is the clear choice.
The products compared
ASRock Phantom Gaming 750W ATX 3.1 Power Supply
Best for: Modern gaming builds needing ATX 3.1
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Gold, Cybenetics Platinum
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Years
View on Amazon: ASRock Phantom Gaming 750W ATX 3.1 Power Supply Affiliate link
The ASRock PG-750G is a fully modular power supply rated for 750W. It meets ATX 3.1 standards and holds 80 PLUS Gold certification. The unit features a compact 5.91-inch square form factor and includes a PCIe 5.1 cable with an NTC sensor. It supports a 220% total power excursion and uses iCOOL intelligent fan control. This model suits gamers needing reliable high-end connectivity.
Pros
- 80 PLUS Gold efficiency rating of 90% or higher
- ATX 3.1 standard with 12V-2x6 connector support
- Fully modular cabling with individual braided pattern
- Includes PCIe 5.1 cable with NTC sensor
- Compact 5.91 x 5.91 x 3.39 inch dimensions
Cons
- Heavier at 7.5 pounds compared to lighter competitors
- Limited to 750W output for high-end builds
- No mention of Cybenetics Platinum certification in key specs
Good fit if
- You need ATX 3.1 compatibility for modern GPUs
- You prefer fully modular cabling for clean builds
- You require a compact square form factor
Skip if
- You need more than 750W of power
- You prefer a lighter power supply unit
- You require a non-modular design
Verdict: ASRock PG-750G 750W ATX 3.1 PSU fits builders who need modern PCIe 5.1 connectivity in a compact square chassis. It delivers solid efficiency and modularity for mid-to-high range gaming systems.
Montech Gamma II 750W Gold Power Supply
Best for: Efficient mid-range builds
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Gold
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 135mm
- Warranty
- 10-year
View on Amazon: Montech Gamma II 750W Gold Power Supply Affiliate link
This Montech Gamma II power supply delivers 750W of power with 80 Plus Gold efficiency. It supports ATX 3.1 and PCIe 5.1 standards, featuring a 12V-2x6 connector for modern graphics cards. The unit uses a 135mm fan with zero RPM mode for quiet operation. It includes full Japanese capacitors and a 10-year warranty. This model suits builders needing reliable, efficient power for current platforms.
Pros
- 80 Plus Gold efficiency rating
- ATX 3.1 and PCIe 5.1 ready
- 135mm fan with zero RPM mode
- 10-year warranty coverage
- 12V-2x6 PCIe connector included
Cons
- Limited to 750W output
- No smart monitoring features listed
- Standard modular design only
Good fit if
- You need ATX 3.1 compatibility
- You want 80 Plus Gold efficiency
- You prefer quiet operation at low loads
Skip if
- You require more than 750W
- You need smart monitoring apps
- You prefer higher wattage options
Verdict: Montech Gamma II 750W ATX 3.1 fits users who prioritize efficiency and modern connector support. It offers reliable performance for mid-range builds without unnecessary complexity.
Specifications side by side
| Spec | ASRock Phantom Gaming 750W ATX 3.1 Power Supply | Montech Gamma II 750W Gold Power Supply |
|---|---|---|
| Wattage | 750W | 750W |
| Efficiency Rating | 80 PLUS Gold, Cybenetics Platinum | 80 PLUS Gold |
| Modularity | Fully Modular | not stated |
| ATX Version | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | 12V-2x6 | 12V-2x6 |
| Fan Size | not stated | 135mm |
| Warranty | 10 Years | 10-year |
| Form Factor | ATX | not stated |
| Recommended Use | Gaming | not stated |
| Connector | 12V-2x6 Connector | not stated |
| Size | 750W | not stated |
| Dimensions | 5.91 × 5.91 × 3.39 inches | 10 × 2 × 2.7 inches |
| Weight | 7.5 pounds | not stated |
| Model | 90-UXP075-GFUAAB | GAMMA II |
Frequently asked questions
Does the ASRock Phantom Gaming support ATX 3.1?
Yes, the ASRock Phantom Gaming 750W is built to the ATX 3.1 specification. This standard ensures compatibility with modern components and includes the 12V-2x6 connector for new GPUs. You get a fully modular design that simplifies cable management in your build.
Is the Montech Gamma II fully modular?
The data provided for the Montech Gamma II does not explicitly state its modularity type. However, it is listed as an 80 PLUS Gold unit with ATX 3.1 support. You should verify the modularity feature in the full product specifications before purchasing to ensure it meets your cable management needs.
Which PSU is smaller for tight cases?
The Montech Gamma II is the more compact option for small form factor builds. It measures 2 inches in height and 10 inches in length. In contrast, the ASRock Phantom Gaming is wider at 5.91 inches. If your chassis has limited vertical clearance, the Montech unit fits better.
Do both power supplies use the 12V-2x6 connector?
Yes, both the ASRock Phantom Gaming and the Montech Gamma II feature the 12V-2x6 connector. This connector supports the PCIe 5.1 standard, allowing you to power modern graphics cards directly without needing risky adapters. Both units are designed for efficient power delivery to high-end components.
What is the weight difference between these models?
The ASRock Phantom Gaming weighs 7.5 pounds. The weight for the Montech Gamma II is not listed in the provided data. The ASRock unit is a square chassis design, while the Montech follows a more traditional rectangular shape. You may need to check the Montech specs for its exact weight.
Are these PSUs good for gaming?
Yes, both units are suitable for gaming systems. The ASRock Phantom Gaming is explicitly recommended for modern gaming builds needing ATX 3.1. The Montech Gamma II is also described as fitting mid-range builds with efficient performance. Both offer 80 PLUS Gold efficiency, which is ideal for sustained gaming loads.