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Compact SFX-L power supply unit with matte black casing, modular cable ports and a 120 mm axial-tech cooling fan visible on one side

ASUS

ASUS ROG Loki 850W SFX-L Platinum power supply

SKU CH-BBJB-Q8573

An 850 W SFX-L Platinum power supply with a 120 mm PWM fan, ATX 3.0 support and a 16-pin PCIe 5.0 cable delivering 600 W, Lambda A certified below 25 dB and 92 % efficiency

  • TypeSFX
  • Maximum Power850W
  • 850 W output powers demanding compact builds
  • SFX-L form factor fits small cases
  • 80 PLUS Platinum 92 % efficiency cuts heat
  • ATX 3.0 ready with 600 W PCIe 5.0 cable
  • Lambda A certified under 25 dB quiet operation

850W SFX-L Platinum power supply

This ASUS ROG Loki unit delivers 850W from an SFX-L form factor with full modular cabling. It carries 80 PLUS Platinum certification for up to 92% efficiency and meets ATX 3.0 guidelines. A 16-pin PCIe cable can supply up to 600W to PCIe Gen 5.0 graphics cards. The condition is new.

Small-form-factor builders needing ATX 3.0 power

The SFX-L size fits compact cases that accept this standard while the 850W ceiling covers high-end single-GPU systems. Builders whose cases only accept the smaller SFX form factor cannot use this unit. Systems requiring more than 850W or multiple 16-pin connectors should look at larger form-factor supplies.

850W headroom with Platinum efficiency

The 850W rating comfortably handles a modern CPU paired with a PCIe Gen 5.0 graphics card drawing up to 600W through the 16-pin cable. Platinum efficiency keeps waste heat and fan noise low, with Lambda A certification confirming noise below 25dB. The 120mm PWM fan spins only when thermal load demands it. Sustained loads beyond 850W exceed the unit's capacity.

Highlights

  • 850 W output powers demanding compact builds
  • SFX-L form factor fits small cases
  • 80 PLUS Platinum 92 % efficiency cuts heat
  • ATX 3.0 ready with 600 W PCIe 5.0 cable
  • Lambda A certified under 25 dB quiet operation

Specifications

BrandASUS
Part NumberROG-LOKI-850P-SFX-L-GAMING
TypeSFX
Maximum Power850W

Questions about this item

What ATX 3.0 16-pin PCIe cable does the 850W Loki include for a PCIe 5.0 graphics card?

It ships with a 16-pin cable that can deliver up to 600 W to a PCIe 5.0 GPU, meeting ATX 3.0 requirements.

Will the 120 mm axial-tech fan stay quiet next to older components in a tight SFX build?

Lambda A certification confirms noise below 25 dB, and the PWM fan ramps only when thermals demand it.

How can I verify the Platinum efficiency is actually reaching 92 % after installation?

Monitor input versus output power under load; 80 PLUS Platinum guarantees up to 92 % efficiency at typical loads.

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