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Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →A modular power supply lets you detach some or all of its power cables. A fully modular PSU has detachable cables throughout; a semi-modular PSU has a mix of fixed and detachable cables; and a non-modular PSU has fixed cables. The practical difference is how much choice you have when connecting and routing cables—not a direct measure of performance or efficiency.
What “modular” means in a power supply
A power supply unit (PSU) delivers power to a PC’s components through cables. Modularity describes whether those cables can be unplugged from the PSU itself. It does not describe whether the PSU is efficient, powerful enough for a build, or electrically better.
With detachable cables, you can leave leads the build does not need disconnected at the PSU. With fixed cables, unused leads remain attached and must be routed or tucked away inside the case. CORSAIR describes the modular approach as allowing builders to “connect only the cables you need” in its fully modular versus regular PSU explanation.
Fully modular, semi-modular, and non-modular PSUs
| Design | Cable arrangement | What it means when building |
|---|---|---|
| Fully modular | All PSU cables can be detached. | Connect the leads the build needs and leave other cables out of the case. |
| Semi-modular | Some cables are fixed; others detach. | Unused detachable leads can be omitted, but fixed leads still need routing. Which cables are fixed depends on the model. |
| Non-modular | All cables are fixed to the PSU. | Every cable remains attached, including any leads the build does not use. |
Fully modular
Every cable can be unplugged from the PSU. This gives the builder the most flexibility to connect only the cables required by the PC.
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Semi-modular
A semi-modular unit combines fixed and detachable leads. For example, CORSAIR says its CX-M semi-modular units retain at least the ATX 24-pin and EPS12V 8-pin cables, while other fixed leads can vary by model. That is an example for this product series, not a rule for every semi-modular PSU. Check the specific model’s documentation to see which cables are fixed.
Non-modular
All cables are permanently attached to the PSU. You cannot unplug unused leads at the power supply, so you may need to route or tuck them out of the way.
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- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
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- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
What modularity changes in a PC build
Cable routing and case space
The main difference is cable selection. A modular PSU lets you leave unused detachable leads out of the case, which may make cable management simpler. That can be useful when space behind the motherboard tray or elsewhere in the case is limited; how much it helps depends on the case, the build, and your routing preferences. Thermaltake discusses this space consideration in its modular versus non-modular PSU comparison.
Cost
Modularity can affect a PSU’s price, but it is not a reliable price formula. CORSAIR says fully modular models cost more than semi-modular and regular options in its comparison, and Thermaltake also notes possible added cost. Neither source establishes a current, market-wide price difference. Compare the specific models and local prices you are considering.
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- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
What modularity does not tell you
A modularity label only tells you about cable attachment. It does not establish the PSU’s wattage suitability, efficiency, electrical quality, noise, physical fit, or connector compatibility with a particular PC.
Efficiency certification is a separate consideration. MSI lists full, semi, and unmodular cable designs separately from 80 PLUS certification in its power-supply selection guidance. A fully modular PSU is not automatically more efficient or better-performing than a non-modular model.
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- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
How to choose between the three designs
- Check the PC’s requirements. Confirm the PSU’s wattage, required connectors, and physical dimensions against the build and case; cable design alone cannot establish compatibility.
- Look at the exact cable set. For a semi-modular PSU, check which cables are fixed. For a fully modular model, confirm that the cables you need are included and supported by its documentation.
- Consider cable-routing space. If your case has limited room to route or store excess leads, being able to omit unused cables may be helpful. If routing is not a concern, fixed cables may be acceptable.
- Compare complete models and prices. Choose based on the PSU’s documented requirements and features as well as its cable layout; do not treat modularity as a stand-in for quality or efficiency.
These categories describe real products: Seasonic presents CORE GX models as fully modular and CORE GM models as semi-modular, while CORSAIR’s VS500 is an example of a fixed-cable PSU. Those product examples illustrate cable arrangements; they are not performance rankings or endorsements.
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- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
