Brand
Semi-Modular PSUs
A semi-modular power supply has the cables every build needs — the 24-pin motherboard connector and the CPU power cable — permanently attached, while the rest detach.
That is a genuinely sensible compromise. Those two cables are used in every single build, so making them removable adds cost and an extra connection for no benefit. Everything else — PCIe power for the graphics card, SATA and Molex for drives and fans — plugs in only if you need it, so unused cables never end up stuffed behind the motherboard tray restricting airflow.
Compared with a non-modular unit, you get a considerably tidier build for a small premium. Compared with fully modular, you save money and lose almost nothing.
Where fully modular is still worth it is a small-form-factor case, where there is nowhere to hide even one unnecessary cable, and a build with a glass side panel where appearance matters.
See also fully modular PSUs and the wattage bands in power supplies.
Corsair 650W Bronze CX650 PSU
In stock
Antec CSK1000 PRO 1000W ATX 3.1 PSU
Out of stock
Semi-Modular PSUs Buying Guide and FAQ
This Semi-Modular PSUs range groups units by this feature. Below are the common questions.
What does modular mean on a power supply?
A modular PSU has this feature. It is a useful feature to look for when matching a unit to a modern build.
Do I need a modular power supply?
It depends on your case: SFX units are for small-form-factor builds, while a normal tower takes a standard ATX unit. Match the feature to your parts and case.
What wattage and rating should I pair with it?
Choose wattage around your graphics card, roughly 650 to 750W for mid-range and 850W and up for high-end, and aim for a reputable 80 Plus Gold unit. That combination suits most gaming PCs.