Longdex ATX Extension Cable 2PCS Alternatives: 6 Similar Picks Compared
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
You might be looking for longdex atx extension cable 2pcs alternatives because your build requires more than a simple extension. The Longdex unit offers a secure 24-pin connection with a locking latch and a manageable 12.6-inch length. It is a practical choice for standard ATX cases where you need a little extra reach without bulk. However, you may need different specifications for a modern system. Some builders require higher wattage power supplies or newer connector standards that a simple cable cannot provide. Others might prefer fully modular designs for cleaner cable management.
We selected these 6 alternatives because their specs overlap with common ATX build requirements. The list includes power supplies that support ATX 3.1 and PCIe 5.1 standards. You will find options ranging from 750W to 1000W in various form factors. Some units feature side-mounted connectors for improved airflow, while others offer white aesthetics for specific builds. Each option provides robust power delivery suitable for gaming or high-performance workstations. This guide helps you compare these specs to find the right fit for your specific motherboard and case dimensions.
Our top pick: Longdex ATX 24-Pin Extension Cable.
Alternatives to Longdex Cable
MSI MAG 850W Fully Modular ATX Power Supply
The MSI MAG 850W is a complete power supply, not just a cable. It delivers 850W of power with ATX 3.1 and PCIe 5.1 support. This unit includes a 12V-2x6 connector for modern graphics cards. It measures 12 inches long, which is significantly larger than the small extension cable. You get full modularity and a 10-year warranty. Choose this if you need a new power source rather than just extending an existing one. It suits gamers who want the latest connectivity standards and reliable long-term performance in a standard ATX form factor.
Corsair RM850x Shift 850W White ATX Power Supply
The Corsair RM850x Shift White provides 850W of power in a compact white casing. It supports ATX 3.1 and PCIe 5.1 standards. The unit is fully modular, allowing you to connect only the cables you need. It measures 6.3 inches in length, making it suitable for smaller cases. This is a power supply unit, so it replaces your entire PSU rather than extending a connection. Select this option if you need modern PCIe 5.1 support and prefer a white aesthetic for your build. It offers efficient power delivery for high-end components.
Corsair RM1000x 1000W ATX 3.1 PSU
The Corsair RM1000x 1000W is a high-capacity power supply for demanding systems. It supports ATX 3.1 and PCIe 5.1 with a 12V-2x6 connector. The unit is fully modular and measures 2.3 inches in length, which is very compact for its wattage. This is not an extension cable but a complete power source. You should pick this if you need robust power delivery for high-end builds. It prioritizes efficiency and cable management. The compact depth allows for easier installation in various case sizes while providing ample power for future upgrades.
Corsair RM1000x Shift 1000W Power Supply
The Corsair RM1000x Shift 1000W is designed for ATX 3.0 compliance. It offers 1000W of power in a compact form factor. The unit is fully modular and supports PCIe 5.0. It measures 7.09 inches in length and 5.08 inches in height. This is a power supply, not an extension cable. Choose this if you need high-wattage power with modern PCIe support. It suits users who prioritize efficient power delivery in a smaller footprint. The ATX 3.0 standard ensures compatibility with current and next-generation hardware requirements.
Corsair RM850x 850W Fully Modular ATX 3.1 PSU
The Corsair RM850x 850W ATX 3.1 PSU provides modern connectivity for gaming builds. It supports PCIe 5.1 and includes a 12V-2x6 connector. The unit is fully modular and measures 2.3 inches in length. This is a complete power supply, offering 850W of reliable power. It is a better choice if you need a new power source for high-end components. The compact design fits well in various cases. Select this option for its robust power delivery and support for the latest generation graphics cards and motherboards.
Corsair RM750x Shift White 750W ATX Power Supply
The Corsair RM750x Shift White 750W is ideal for clean cable management. It supports ATX 3.1 and PCIe 5.1 standards. The unit is fully modular and measures 6.3 inches in length. It features a white finish for aesthetic builds. This is a power supply unit, not an extension cable. You should choose this if you prioritize ease of cable management and modern connectivity. It offers 750W of power, which is sufficient for many mid-to-high-end systems. The compact design and white color make it a practical choice for visible builds.
Quick picks
Our 7 picks
Longdex ATX 24-Pin Extension Cable
Best for: Standard ATX cases needing short extensions
- Form Factor
- ATX
- Weight
- 5.29 ounces
This Longdex ATX extension cable adds 12.6 inches of reach to your motherboard power connection. It features a 24-pin male-to-female interface compatible with standard 20+4 pin connectors. The black cable includes a removable tie and a locking latch to secure the connection. At 5.29 ounces, it is lightweight. It helps reduce stress on your power supply connectors when building or upgrading your PC.
Pros
- Extends length by 12.6 inches (32 cm)
- Includes locking latch to prevent disconnection
- Comes with removable cable tie for bundling
- Compatible with standard 20+4 pin ATX connectors
Cons
- Single cable length of 12.6 inches may be too short for large cases
- No mention of gold-plated contacts for corrosion resistance
- Basic black cable lacks color-coding for easier management
Good fit if
- You need a few extra inches to reach your motherboard
- You want a secure latch to prevent accidental unplugging
- You are building in a standard ATX case
Skip if
- You require a much longer cable than 12.6 inches
- You need multiple cables in one package
- You prefer gold-plated connectors for better conductivity
Verdict: Longdex ATX 24-Pin Extension Cable is a simple, secure way to extend your motherboard power connection. It fits users who need a small amount of extra length and want a locked-in connection.
MSI MAG 850W Fully Modular ATX Power Supply
Best for: Gaming builds needing ATX 3.1 support
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
The MSI MAG A850GL is a fully modular 850W power supply designed for gaming systems. It carries an 80 Plus Gold efficiency rating and supports the latest ATX 3.1 and PCIe 5.1 standards. The unit features a compact ATX form factor measuring 12 inches in length. It includes a 10-year warranty and uses the modern 12V-2x6 connector for graphics cards.
Pros
- 850W output capacity
- 80 Plus Gold efficiency
- ATX 3.1 and PCIe 5.1 ready
- Fully modular cable design
- 10-year warranty coverage
Cons
- 12-inch length may not fit smaller cases
- 8.75-inch width is wider than standard ATX units
- No LCD display for real-time monitoring
Good fit if
- You need a fully modular PSU for high-end gaming builds
- You require support for the latest ATX 3.1 power standards
- You want a unit backed by a 10-year warranty
Skip if
- You have a small form factor case with tight space constraints
- You prefer a standard-width ATX power supply
- You need a budget option under typical mid-range pricing
Verdict: MSI MAG A850GL 850W ATX 3.1 PSU offers robust power and modern connectivity for gamers who can accommodate its slightly larger physical dimensions. It suits users prioritizing long-term reliability and latest generation compatibility over compact size.
Corsair RM850x Shift 850W White ATX Power Supply
Best for: Modern builds needing PCIe 5.1 and white aesthetics
- 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
This Corsair power supply delivers 850W of power with a fully modular design. It supports ATX 3.1 standards and PCIe 5.1 connectors for modern graphics cards. The 80 Plus Gold efficiency rating ensures reliable performance. Measuring 6.3 inches long, it fits in compact cases. The white finish matches builds with light-colored components. You get low-noise operation with zero RPM fan mode.
Pros
- 850W output capacity
- Fully modular cable management
- ATX 3.1 and PCIe 5.1 support
- 80 Plus Gold efficiency
- Compact 6.3-inch length
Cons
- White color limits dark build matching
- Heavier at 3.75 pounds
- Standard ATX form factor size
Good fit if
- You need PCIe 5.1 support for new GPUs
- You prefer a white aesthetic for your case
- You want fully modular cables for clean builds
Skip if
- You require a black power supply
- You need more than 850W of power
- You want a non-modular power supply
Verdict: Corsair RM850x Shift White offers modern connectivity and efficient power in a compact form. It fits builders who need PCIe 5.1 support and prefer a white finish for their system.
Corsair RM1000x 1000W ATX 3.1 PSU
Best for: High-wattage modern PC 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
This Corsair power supply delivers 1000W of power with fully modular cabling. It supports ATX 3.1 standards and PCIe 5.1 via 12V-2x6 connectors. The unit measures 3.39 x 5.91 x 2.3 inches and weighs 6.88 pounds. It holds Cybenetics Gold efficiency certification. You should choose this unit if you need high wattage for modern components and want clean cable management.
Pros
- 1000W output capacity
- Fully modular design
- ATX 3.1 compliant
- PCIe 5.1 support
- Cybenetics Gold efficiency
Cons
- Heavier than many competitors at 6.88 pounds
- Larger footprint requires more case space
- No included cable extensions
Good fit if
- You need 1000W for high-end builds
- You want fully modular cables
- You need PCIe 5.1 support
Skip if
- You need a compact SFX unit
- You want lower wattage
- You prefer a lighter unit
Verdict: Corsair RM1000x 1000W ATX 3.1 is a high-capacity choice for builders who need robust power delivery and modern connector support. It fits systems that prioritize efficiency and cable management over minimal weight.
Corsair RM1000x Shift 1000W Power Supply
Best for: High-wattage ATX 3.0 builds
- Wattage
- 1000W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- Dimensions
- 7.09 × 5.91 × 5.08 inches
- Weight
- 4.2 pounds
This Corsair RM1000x Shift is a fully modular 1000W power supply built for ATX 3.0 systems. It carries an 80 Plus Gold efficiency rating and features a compact 5.91 x 5.08 x 7.09 inch form factor. The design includes a modular side interface to simplify cable management. You should choose this unit if you need high wattage and modern PCIe 5.0 compliance for new graphics cards.
Pros
- 1000W output capacity
- ATX 3.0 and PCIe 5.0 compliant
- 80 Plus Gold efficiency rating
- Fully modular cable design
- Compact 5.91 x 5.08 x 7.09 inch dimensions
Cons
- Heavier at 4.2 pounds compared to standard units
- Brand listed as Mkastry in data, not Corsair
- No mention of cable length or included accessories
Good fit if
- You are building a high-end PC with an ATX 3.0 standard
- You need 1000W of power for multiple GPUs
- You want a fully modular design for clean cable routing
Skip if
- You need a power supply under 850W
- You require an ATX 3.1 compatible unit
- You prefer a non-modular or semi-modular design
Verdict: Corsair RM1000x Shift 1000W ATX 3.0 is a compact, high-wattage option for builders needing ATX 3.0 compliance. It suits users who prioritize modern PCIe 5.0 support and efficient power delivery in a small form factor.
Corsair RM850x 850W Fully Modular ATX 3.1 PSU
Best for: modern ATX 3.1 builds
- 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
This Corsair power supply delivers 850W of continuous power with fully modular cabling. It meets ATX 3.1 standards and supports PCIe 5.1 via a 12V-2x6 connector. The unit is Cybenetics Gold certified for efficiency. Its compact dimensions measure 3.39 by 5.91 by 2.3 inches. This model suits builders needing modern connector support and reliable power delivery for high-end systems.
Pros
- 850W wattage output
- Fully modular cable design
- ATX 3.1 compliance
- PCIe 5.1 support with 12V-2x6 connector
- Cybenetics Gold efficiency rating
Cons
- Heavier at 3.9 pounds compared to lighter alternatives
- Larger width of 3.39 inches may limit fit in small cases
- No mention of zero-RPM fan mode in specifications
Good fit if
- You need PCIe 5.1 support for new GPUs
- You want a fully modular ATX 3.1 power supply
- You prioritize Cybenetics Gold efficiency certification
Skip if
- You require a power supply under 3 inches wide
- You are building a low-power system needing less than 850W
- You prefer a non-modular design for simplicity
Verdict: Corsair RM850x ATX 3.1 850W PSU provides modern connectivity for gamers. It fits users who need reliable power for high-end components.
Corsair RM750x Shift White 750W ATX Power Supply
Best for: clean cable management in ATX 3.1 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
The Corsair RM750x Shift is a fully modular 750W power supply built for modern builds. It features ATX 3.1 certification and PCIe 5.1 support for new graphics cards. The side-mounted modular connectors simplify cable management. A 140mm fan ensures quiet operation. This unit uses Japanese electrolytic capacitors for stability. It suits users who need efficient power delivery and clean internal wiring.
Pros
- ATX 3.1 certified for modern platform support
- Side-mounted modular connectors for easier access
- 140mm fluid dynamic bearing fan for low noise
- Fully modular with micro-fit connectors
- 80 Plus Gold efficiency rating
Cons
- 750W output may limit high-end GPU builds
- Heavier build at 3.75 pounds
- No mention of zero-RPM mode in specs
Good fit if
- You need side-mounted connectors for cleaner cable routing
- You are building with ATX 3.1 compatible components
- You prefer fully modular cables for compact cases
Skip if
- You require more than 750W of power
- You need a 120mm fan for tight spaces
- You are looking for a budget 80 Plus Bronze unit
Verdict: Corsair RM750x Shift 750W ATX 3.1 is ideal for builders prioritizing cable management ease and modern PCIe 5.1 support over raw wattage.
Specifications side by side
| Spec | Longdex ATX 24-Pin Extension Cable | MSI MAG 850W Fully Modular ATX Power Supply | Corsair RM850x Shift 850W White ATX Power Supply | Corsair RM1000x 1000W ATX 3.1 PSU | Corsair RM1000x Shift 1000W Power Supply | Corsair RM850x 850W Fully Modular ATX 3.1 PSU | Corsair RM750x Shift White 750W ATX Power Supply |
|---|---|---|---|---|---|---|---|
| Wattage | not specified | 850W | 850W | 1000W | 1000W | 850W | 750W |
| Efficiency Rating | not specified | 80+ Gold | 80 Plus Gold | Cybenetics Gold | 80 Plus Gold | Cybenetics Gold | 80 Plus Gold |
| Modularity | not specified | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular |
| ATX Version | not specified | ATX 3.1 | ATX 3.1 | ATX 3.1 | ATX 3.0 | ATX 3.1 | ATX 3.1 |
| PCIe Connector Type | not specified | 12V-2x6 | PCIe 5.1 | 12V-2x6 | not specified | 12V-2x6 | not specified |
| Fan Size | not specified | not specified | not specified | not specified | not specified | not specified | 140mm |
| Warranty | not specified | 10 Year | not specified | not specified | not specified | not specified | not specified |
| Form Factor | ATX | ATX | ATX | ATX | ATX | ATX | ATX |
| PCIe Version | not specified | PCIe 5.1 | PCIe 5.1 | PCIe 5.1 | not specified | PCIe 5.1 | PCIe 5.1 |
| Recommended Use | not specified | Gaming | not specified | not specified | not specified | not specified | not specified |
| Connector | not specified | 12V-2x6 Connector | not specified | 12V-2x6 Connector | not specified | 12V-2x6 Connector | not specified |
| Size | not specified | 850W (PCIE 5) | 850W | 1000W | 1000W | 850W | 750W |
| Weight | 5.29 ounces | not specified | 3.75 pounds | 6.88 pounds | 4.2 pounds | 3.9 pounds | 3.75 pounds |
| Dimensions | not specified | 12 × 8.75 × 4.92 inches | 6.3 × 5.91 × 3.39 inches | 2.3 × 3.39 × 5.91 inches | 7.09 × 5.91 × 5.08 inches | 2.3 × 3.39 × 5.91 inches | 6.3 × 5.91 × 3.39 inches |
| Color | Black | not specified | White | Black | Black | Black | White |
| Model | ATXECMP-2 | not specified | not specified | not specified | not specified | not specified | CP-9020273-NA |
Frequently asked questions
What is the difference between an ATX extension cable and a power supply?
An extension cable simply lengthens an existing power connection, while a power supply converts wall power for your components. The Longdex cable extends your motherboard 24-pin connection. The alternatives listed are complete units that provide power to the entire system, not just an extension.
Why do these alternatives use ATX 3.1 and PCIe 5.1?
These standards support modern graphics cards and efficient power delivery. Many listed options, like the MSI MAG and Corsair RM series, include PCIe 5.1 support. They also feature the 12V-2x6 connector, which is designed for newer GPUs and offers improved safety over older connectors.
Which option is best for small form factor builds?
Compact dimensions matter for tight cases. The Corsair RM1000x ATX 3.1 measures only 2.3 inches in length. The Corsair RM850x Shift White is also compact at 6.3 inches long. These smaller units fit better in cases with limited space compared to larger, standard-sized power supplies.
Do I need a fully modular power supply?
Fully modular units let you connect only the cables you need. Most listed alternatives, including the Corsair RM series and MSI MAG, are fully modular. This feature simplifies cable management and improves airflow by removing unnecessary cables from your case, keeping your build clean and organized.
Is an 80 Plus Gold rating important?
An 80 Plus Gold rating indicates high energy efficiency. Several listed power supplies, such as the MSI MAG and Corsair RM750x Shift, hold this certification. Higher efficiency means less wasted energy as heat and potentially lower electricity costs over time, making it a practical choice for long-term use.
How much power do these alternatives provide?
Wattage determines how many components your system can support. Options range from 750W to 1000W. The Corsair RM750x Shift provides 750W, while the Corsair RM1000x Shift offers 1000W. Choose a higher wattage if you plan to use high-end graphics cards or multiple storage drives in your build.
Can I use these power supplies for gaming builds?
Yes, these units are designed for high-performance gaming. The MSI MAG is explicitly recommended for gaming builds needing ATX 3.1 support. The Corsair RM850x ATX 3.1 also fits users needing reliable power for high-end components. Both offer the modern connectivity required for current gaming hardware.
What is the 12V-2x6 connector used for?
The 12V-2x6 connector is the new standard for PCIe power. It replaces the older 12VHPWR connector with a more secure design. Many listed alternatives, including the MSI MAG and Corsair RM1000x, include this connector. It ensures stable power delivery to modern graphics cards without risk of melting.