ASUS ROG Loki 1000W SFX-L Platinum PSU: features, specs and fit

The ASUS ROG Loki 1000W is a power supply unit (PSU) in the SFX-L small form factor. It is made for compact PC builds that still need a lot of power, such as a small case with a high-end graphics card. Here is what the listed specs mean and what to confirm before fitting it.

What SFX-L means

PSUs come in several physical sizes. Standard ATX units are the largest; SFX units are much smaller, and SFX-L is a slightly longer variant that leaves room for a bigger fan. The listing says the Loki comes with an ATX-to-SFX bracket, which is meant to let it mount in a standard ATX case as well. Small cases generally list which of these PSU sizes they accept, so confirm that SFX-L is supported before buying. The unit measures about 9.4 x 27.2 x 1.0 inches as listed, which probably includes cabling, and weighs 2.2 lb.

1000W and 80 PLUS Platinum

The 1000W figure is the maximum continuous output. A PC usually draws far less than this most of the time, but the headroom suits systems with demanding graphics cards and processors. The unit is 80 PLUS Platinum certified. That programme tests efficiency at set loads, and ASUS says the unit reaches up to 92% efficiency. Higher efficiency means less energy lost as heat, which can also mean less fan noise.

ATX 3.0 and PCIe 5.0 power

The Loki conforms to the ATX 3.0 guidelines. The listing says it includes a 16-pin PCIe cable that can carry up to 600W to PCIe Gen 5.0 graphics cards. Newer graphics cards often use this single 16-pin connector in place of several 8-pin ones, so it can simplify wiring, and it is worth checking which connector your card uses. Make sure the cable is fully seated, as the manual instructs.

Cooling and the 0dB button

An axial-tech 120mm fan with PWM control keeps the unit cool, and ASUS says it is designed for low noise and controlled temperatures. Heatsinks cover critical components, which ASUS says leads to lower temperatures and a longer service life. The name also mentions a 0dB fan button. Typically this switches on a mode where the fan stays off at low loads for silent operation, and spins up when demand rises. Check the manual for how the button works on this model.

Cables and lighting

The unit is fully modular, so you connect only the cables you need, which helps with tidiness in a small case with little room. The Loki is Aura Sync compatible, meaning its lighting can be synchronised with other compatible ASUS parts. The listing also mentions RGB lighting and a 10-year warranty.

Who it suits

It suits builders of compact, powerful PCs who need an SFX-L unit with a modern graphics-card connector, and people who want an ATX-sized fit through the supplied bracket.

What to check before you buy

• Case support: confirm that your case supports SFX-L, or ATX through the bracket.
• Graphics card connector: check whether your card uses the 16-pin connector or older 8-pin ones.
• Cable length: modular cables in a small case need to reach the parts; confirm lengths against your layout.
• Power need: add up the expected draw of your processor and graphics card.
• Motherboard lighting: check for header compatibility if you want synchronised lighting.
• Installation: follow the manual and have the system switched off and unplugged when working inside it.

The short version

• 1000W fully modular SFX-L power supply with an ATX-to-SFX bracket.
• 80 PLUS Platinum certified, up to 92% efficiency, as ASUS states.
• ATX 3.0 compatible, with a 16-pin PCIe cable for up to 600W to PCIe Gen 5.0 cards.
• 120mm PWM fan with a 0dB fan button, plus Aura Sync RGB.
• 10-year warranty as listed.

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