Asus ROG ROG-LOKI-850P-SFX-L-GAMING 850W Power Supply

The Asus ROG Loki 850W SFX-L Power Supply is engineered for small form factor builds that crave big power without sacrificing space, acoustics, or aesthetics. Building a high-performance gaming PC in a compact chassis? Loki delivers with enthusiast-grade components, meticulous cooling design, and a platinum efficiency rating that keeps heat and noise at bay. Drawing on the proven heritage of the ROG Thor, Loki merges premium materials, robust electrical design, and modular versatility so you can power your next ultra-compact rig with confidence.

• Premium SFX-L form factor with 850W output: Designed to fit compact cases while delivering ample headroom for high-end GPUs and multiple drives. Loki’s 850 watts provide a stable, clean power delivery for demanding builds and overclocking scenarios.
• 80 Plus Platinum efficiency: Advanced DC-DC conversion and high-quality components reduce energy waste, lower operating temperatures, and minimize heat generation, which helps your system stay quiet under load.
• Quiet, reliable cooling with a 120mm fan: The Loki employs a large, efficient fan coupled with smart cooling logic that prioritizes silent operation. In low and moderate loads the fan may stay off or run at near-silent speeds, letting your system remain hushed during light tasks and casual gaming.
• Fully modular and tidy cable management: A comprehensive set of modular cables makes it easy to route and hide wires in compact cases, improving airflow and aesthetics while reducing build time.
• Built for durability and longevity: High-quality Japanese capacitors and robust internal rails ensure stable power delivery, superior reliability, and long-term performance for your gaming rig or compact workstation.

Technical Details of Asus ROG Loki 850W

• Model: ROG Loki 850W Platinum
• Form Factor: SFX-L (small form factor with enhanced length to accommodate a 120mm fan)
• Power Output: 850 Watts
• Efficiency: 80 Plus Platinum
• Modularity: Fully modular cables for flexible, tidy builds
• Cooling: 120mm fan with optimized airflow and semi-passive operation to minimize noise
• Rail Design: Single/high-quality 12V rail configuration for stable power delivery
• Connectors (typical): 24-pin ATX, 8-pin CPU, PCIe 6+2-pin connectors, and multiple peripheral cables (connector compatibility varies by SKU)
• Protection Features: Over-current, over-voltage, short-circuit protection, and thermal protection to safeguard your components
• Compatibility: Designed for modern gaming builds, especially compact SFF and micro-ATX cases that support SFX-L size

how to install Asus ROG Loki 850W

Before you begin, verify your case supports the SFX-L form factor and has adequate clearance for the length and the 120mm fan. Power supplies in this category require attention to cabling and airflow to maximize cooling in tight spaces.

Step 1 — Prepare your case: Remove the existing PSU if upgrading. Ensure mounting points align with the Loki’s screw pattern. Keep the case open and accessible to organize cables as you go.

Step 2 — Mount the PSU: Slide the ROG Loki into the PSU bay with the fan facing the intake side (as recommended by your case’s airflow design). Secure the unit with the included screws, making sure the unit is aligned and stable.

Step 3 — Connect essential power: Attach the 24-pin motherboard power connector and the 8-pin (sometimes 4+4 or 8+4) CPU power connector. If your motherboard or CPU requires additional power connectors for overclocking or multi-GPU setups, connect those modular cables accordingly.

Step 4 — Attach PCIe and peripheral cables: Connect PCIe power cables to your graphics card(s) and any required supplementary PCIe or SATA/Molex cables for storage and fans. Route cables cleanly along the case edges to promote airflow and reduce cable clutter.

Step 5 — Manage cables and check routing: Tidy the cables behind the motherboard tray or along the edges of the case. Use zip ties or Velcro straps to secure them safely without pinching fans or obstructing airflow.

Step 6 — Power it up and test: Reconnect the system’s power cord, boot the PC, and verify that all components power on correctly. If your case and BIOS allow it, enable any fan control or low-noise profiles to maximize the Loki’s silent operation.

Step 7 — Performance validation: Run a quick stress test or gaming session to confirm stable operation under load. If you notice unusual voltages or instability, recheck cable connections and ensure the PSU is properly seated.

Frequently asked questions

Q: Is the Loki fully modular? A: Yes. The Loki 850W SFX-L PSU uses a fully modular cable design, allowing you to attach only the cables you need for your build. This helps with airflow, cable management, and a cleaner interior in compact cases.

Q: What is SFX-L? A: SFX-L is a form factor that extends the traditional SFX size with a longer chassis and a larger 120mm fan. This design improves cooling efficiency and enables higher wattage in compact builds, making it ideal for powerful gaming rigs in small form factors.

Q: How quiet is the Loki during gaming? A: The Loki is engineered for quiet operation, featuring a large 120mm fan and an adaptive cooling strategy. In light tasks, the fan can idle or stay near silent, and even under gaming load, the cooling system prioritizes low noise while maintaining stable power delivery.

Q: Can Loki power high-end GPUs and CPUs together? A: Yes. With 850W of continuous power and high-quality components, Loki is designed to handle modern, power-hungry CPUs and GPUs in compact builds. Always review your GPU’s TDP and your overall system load to ensure headroom.

Q: Does Loki support the latest PCIe connectors? A: Loki provides modern PCIe power connectors appropriate for contemporary GPUs. The exact configuration can vary by SKU, so confirm the included cables in your package to ensure compatibility with your graphics card.

Q: Is it compatible with ATX 3.0 power requirements? A: Loki’s design focuses on efficiency, modularity, and compact form factor. For specific compatibility with latest GPU power standards (such as ATX 3.0 features), refer to the product’s official documentation or ASUS's specifications for your exact SKU.

Q: What about warranty and support? A: As with most ASUS ROG components, Loki ships with a manufacturer warranty and access to customer support. Always register your product and keep the receipt for warranty eligibility and service inquiries.

The Asus ROG Loki 850W SFX-L Power Supply stands out in the market for compact power without compromise. Its platinum efficiency reduces heat and energy usage, which translates into quieter operation and less strain on your case fans. The modular design makes building or upgrading in tight spaces a breeze, and the 850W rating provides comfortable headroom for a modern gaming rig with overclocked components or additional drives. If you’re dreaming of a high-performance system inside an SFF chassis, the Loki delivers an ideal balance of power, efficiency, and whisper-quiet operation that ASPUR enthusiasts will appreciate.