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45575 Dulles Eastern Plz
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Everything for Back to School — and then someShop now

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Sterling
45575 Dulles Eastern Plz
Ste 188
Sterling, VA 20166
Opens at 10 am
Find Another Store
Main Content
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power supplies

Semi Modular Psu

A semi-modular PSU, or power supply unit, is a type of PSU that combines the features of both a fully modular and non-modular PSU. It is designed to provide a balance between cost and convenience. Browse the top-ranked list of semi-modular PSUs below along with associated reviews and opinions.

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  1. CORSAIR - CX-M Series CX650M Semi-Modular Low-Noise ATX Power Supply - Black

    SKU: J39QHHFSS2

    This is a great stock replacement power supply for a gaming PC. Super easy to install....Has been working reliably since purchased and was bought in great quality....Great stock replacement

    Product Description

    A black semi-modular ATX power supply offering low-noise operation, 80 PLUS Bronze efficiency, and reliable performance.
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    Your price for this item is $109.99

  2. Thermaltake - Smart BM3 80+ Bronze PCIE Gen 5 ATX 3.0 850W Semi-Modular Power Supply - Black

    SKU: J39ZPC9W4P

    Worked out the best can’t wait to get another one later on...Easy install and I love the modular nature, so there are fewer cables clogging up the guts of my PC....Works great.

    Product Description

    A black semi-modular 850W power supply with 80+ Bronze efficiency and PCIe Gen 5.0 support.
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    Your price for this item is $89.99
    Save $10
    The previous price was $99.99

  3. Thermaltake - Smart BM3 80+ Bronze PCIE Gen 5 ATX 3.0 750W Semi-Modular Power Supply - Black

    SKU: J39ZPC9WTX

    Great Product...Great product and easily installed through the Best Buy Geek Squad!...Great power supply for the price....Love that it was semi-modular making it very easy to add what I needed while it...

    Product Description

    A black semi-modular 750W power supply with 80+ Bronze efficiency and PCIe Gen 5.0 support.
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    Your price for this item is $79.99
    Save $10
    The previous price was $89.99

  4. Thermaltake - Smart BM3 80+ Bronze PCIE Gen 5 ATX 3.0 650W Semi-Modular Power Supply - Black

    SKU: J39ZPC9W9V

    Great power supply!...[Employee of bestbuy] One of the best budget PSU’s out there, great ease of use and looks nice and clean...Great value...Works great. I love that it is modular at such a low price...

    Product Description

    A black semi-modular ATX 3.0 power supply with 650W output, 80+ Bronze efficiency, and PCIe Gen 5 support.
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    Your price for this item is $59.99
    Save $20
    The previous price was $79.99

  5. CORSAIR - CX-M Series CX750M Semi-Modular Low-Noise ATX 3.1 Power Supply - Black

    SKU: J39TSCHZXC

    Great for the price...Love that it came with the new connector for Nvidia 50xx gpus!...[Employee of bestbuy] I love buying from corsair, they always have good standard gold rated for their

    Product Description

    A black semi-modular ATX 3.1 power supply with low-noise fan and Cybenetics Bronze efficiency.
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    Your price for this item is $84.99
    Save $15
    The previous price was $99.99

  6. CORSAIR - CX-M Series CX650M Semi-Modular Low-Noise ATX 3.1 Power Supply - Black

    SKU: J39TSCHZ22

    works good love it so much great item make sure to buy...Working Great...It works great for my new media sever build....The small form factor and semi-modular design is great for mediem and older cases....

    Product Description

    A semi-modular black ATX power supply with low-noise operation, Cybenetics Bronze efficiency, and PCIe 5.1 support.
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    Your price for this item is $89.99

  7. Rosewill - VSB 650W 80+ Bronze, ATX 3.0/3.1, Semi-Modular PSU, PCIe 5.1, 105°C Fan, 5 Year Warranty

    SKU: J39K6Y5THH

    Product Description

    A semi-modular 650W ATX power supply with 80+ Bronze efficiency, PCIe 5.1 support, and silent cooling.
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    Your price for this item is $64.99

  8. Rosewill - VSB 850W 80+ Bronze, ATX 3.0/3.1, Semi-Modular PSU, PCIe 5.1, 105°C Fan, 5 Year Warranty

    SKU: J39K6Y5TTQ

    Product Description

    A semi-modular 850W ATX power supply with 80+ Bronze efficiency, PCIe 5.1 support, and silent cooling.
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    Your price for this item is $86.49

  9. REDRAGON - GC-PS008 PSU008 80+ Gold 650 Watt ATX Fully Modular Power Supply w/ 80 Plus Gold Certified, Compact 160mm Size - Black

    SKU: CZ6WWRYCKZ

    Product Description

    A fully modular black ATX power supply with 80 Plus Gold efficiency and reliable capacitor construction.
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    Your price for this item is $90.00
    Save $20
    The previous price was $110.00

  10. CORSAIR - RM850x Fully Modular ATX PSU - 12V-2x6, ATX 3.1 & PCIe 5.1

    SKU: J39TSCH7V8

    Product Description

    A fully modular ATX power supply with 80 Plus Gold efficiency, ATX 3.1, and PCIe 5.1 support.
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    Your price for this item is $163.99
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FAQ

A semi modular PSU (Power Supply Unit) is a type of computer power supply where some of the cables are permanently attached, while others can be added or removed as needed. This design helps reduce cable clutter and improves airflow inside your PC case.

Semi modular PSUs allow you to use only the cables you need, leading to a cleaner build and easier cable management compared to non-modular PSUs, which have all cables permanently attached.

On most semi modular PSUs, the essential cables like the 24-pin motherboard and 8-pin CPU connectors are fixed, while peripheral cables such as SATA, Molex, and PCIe connectors are modular and can be added as needed.

Semi modular PSUs are generally compatible with most PC cases that support standard ATX power supplies. Always check your case’s specifications for PSU size and clearance requirements.

Yes, upgrading from a non-modular to a semi modular PSU is straightforward. Simply disconnect your old PSU, remove it, and install the new semi modular unit, connecting only the necessary cables for your components.