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Compact SFX-L power supply with matte black housing and 120mm ARGB fan visible through vented side

ASUS

ASUS ROG-LOKI-850P-SFX-L-GAMING power supply

SKU CH-6N17-DS5X3 MPN ROG-LOKI-850P-SFX-L-GAMING

SFX-L form-factor 850 W unit with 80 PLUS Platinum efficiency, fully modular cables, a 120 mm PWM ARGB fan certified below 25 dB.

  • Max wattage850 W
  • Modular cablingFull Modular
  • Main power connector24Pin
  • PCIe power connectors3 × 6+2-Pin
  • SATA power connectors6
  • PSU length limit125 mm

Model SFX 80+ Platinum (850W) Black

  • Lower temperatures and longer component life from ROG heatsinks covering critical parts
  • Quiet operation certified below 25 dB by Lambda A rating
  • Up to 92 % efficiency with 80 PLUS Platinum certification reducing heat and noise
  • PCIe Gen 5 graphics support via included 16-pin cable delivering up to 600 W
  • Synchronised lighting across the build with Aura Sync compatible addressable RGB

SFX-L 850 W Platinum PSU

The ASUS ROG Loki SFX-L delivers 850 W of continuous power in a 125 mm long fully modular chassis. It targets compact gaming builds that need ATX 3.0 compliance and a native 16-pin PCIe Gen 5 connector for modern graphics cards. The 80 PLUS Platinum rating guarantees up to 92 % efficiency across typical loads.

Lambda A noise and axial-tech cooling

A 120 mm PWM ARGB fan keeps acoustics below 25 dB at low to medium load, earning Lambda A certification. ROG heatsinks cover critical components to lower internal temperatures and extend unit lifespan. The fan curve stays quiet during everyday workloads while maintaining thermal headroom for sustained output.

Compact footprint with ATX adapter included

The 125 x 125 x 63.5 mm form factor fits SFX-L bays and, with the bundled bracket, standard ATX cut-outs. Full modular cabling includes two CPU 4+4-pin leads, three PCIe 8-pin leads, one PCIe Gen 5 16-pin lead, six SATA and four peripheral connectors. Aura Sync RGB integration synchronises lighting with compatible motherboards.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $197.99
Pricier than about 63% of the 10,869 comparable items (median $142.99).
Max wattage 850 W
Typical for this category: the median of 930 items is 850 W.

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Specifications

Product
Brand nameASUS
Product lineROG LOKI
Model nameROG-LOKI-850P-SFX-L-GAMING
Product typeATX 3.0 Compatible / ATX12 V
Ports & slots
PCIe power connectors3 × 6+2-Pin
SATA power connectors6
Output type+3.3 V@20A, +5 V@20A
Connection typesMB 24/20-pin x 1
CPU 4+4-pin x 2
PCI-E 16-pin x 1
PCI-E 8-pin x 3
SATA x 6
PERIPHERAL x 4
Power
Max wattage850 W
Modular cablingFull Modular
Main power connector24Pin
Efficiency certification80 PLUS PLATINUM Certified
Built-in protectionOPP/OVP/UVP/SCP/OCP/OTP
Supply voltage100–240 V
Size & build
Product dimensions125 × 125 × 63.5 mm
Product weight1.815kg (single PSU)
Shipping weight2.72 kg
Package size330 × 229 × 102 mm
Compatibility
PSU length limit125 mm

Other versions of this model

3 more in the same range

Questions about this item

Will this 125 mm long unit fit in a standard SFX-L case?

The housing is 125 mm deep and an ATX-to-SFX bracket is included, so it matches the SFX-L form factor used by most current small-form-factor cases.

Can the single 16-pin cable deliver 600 W to a PCIe 5.0 graphics card without adapters?

Yes, the bundled 16-pin cable is rated for up to 600 W and plugs directly into the PSU, meeting ATX 3.0 requirements for Gen 5 cards.

How loud is the 120 mm fan under typical gaming loads?

Lambda A certification confirms noise stays below 25 dB, and the PWM fan stops completely at low load for silent idle operation.

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