ASUS ROG Loki 850W SFX-L vs ASUS ROG Strix 1200W Platinum: Spec Comparison
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The asus rog loki sfx l 850w vs rog strix 1200w platinum comparison highlights two distinct power supply approaches from ASUS. Both units offer 80 PLUS Platinum efficiency and fully modular cabling. They share a 10-year warranty and ROG branding. The main difference lies in their form factor and wattage. The Loki is a compact SFX-L unit rated at 850W. The Strix is a standard ATX unit delivering 1200W. You need to decide which size and power level fit your build.
Key differences
| Aspect | ASUS ROG Loki 850W SFX-L Platinum PSU | ASUS ROG Strix 1200W Platinum PSU |
|---|---|---|
| Wattage | 850W | 1200W |
| Form Factor | SFX-L | ATX |
| Dimensions | 4.9 x 4.9 x 2.5 inches | 6.3 x 5.9 x 3.4 inches |
| ATX Version | ATX 3.0 | ATX 3.1 |
| Fan Size | 120mm | not listed |
Which one should you choose?
Choose ASUS ROG Loki 850W SFX-L Platinum PSU if
- You are building in a small form factor case that requires an SFX-L power supply.
- You need a compact unit that fits in tight spaces without sacrificing efficiency.
- You prefer a standardized 120mm fan for predictable acoustic performance.
Choose ASUS ROG Strix 1200W Platinum PSU if
- You require higher wattage for extreme gaming or workstation loads.
- You are building in a standard ATX case with ample space.
- You want the latest ATX 3.1 standard for future-proofing.
Verdict: Choose the Loki if your case size is the primary constraint and 850W is sufficient for your GPU. Pick the Strix if you need maximum power headroom and have a standard ATX chassis. Both deliver high efficiency and reliable performance.
Loki 850W vs Strix 1200W Specs
Form Factor
The ASUS ROG Loki 850W SFX-L Platinum uses the compact SFX-L form factor, measuring 4.9 inches in length, 4.9 inches in width, and 2.5 inches in height. This smaller footprint allows it to fit into mini-ITX and micro-ATX cases where standard ATX units will not. The ASUS ROG Strix 1200W Platinum follows the standard ATX size, with dimensions of 6.3 inches in length, 5.9 inches in width, and 3.4 inches in height. You need a case with full ATX support for the Strix. The Loki wins here for small builds.
Wattage Output
Power output differs significantly between these two units. The ASUS ROG Loki 850W SFX-L Platinum provides 850 watts of continuous power. The ASUS ROG Strix 1200W Platinum delivers 1200 watts. This 350-watt difference matters if you plan to install high-end graphics cards or multiple drives. The Strix offers more headroom for extreme gaming rigs or workstation builds. The Loki is sufficient for most mid-to-high range systems but lacks the raw power capacity of the Strix for future-proofing heavy loads.
ATX Version
Both power supplies support modern PCIe standards, but they differ in version compliance. The ASUS ROG Loki 850W SFX-L Platinum is ATX 3.0 compatible and includes a 16-pin PCIe cable for Gen 5.0 graphics cards. The ASUS ROG Strix 1200W Platinum meets the newer ATX 3.1 specification. While both handle modern GPUs, the Strix adheres to the latest industry guidelines. This version update may offer minor improvements in compatibility with the newest hardware releases. The Strix holds a slight technical edge here.
Efficiency Rating
Both units share the same efficiency certification. The ASUS ROG Loki 850W SFX-L Platinum holds 80 PLUS Platinum certification, achieving up to 92% efficiency. The ASUS ROG Strix 1200W Platinum also carries 80 PLUS Platinum certification. This means both power supplies convert AC to DC power with minimal waste, reducing heat generation and lowering electricity costs. Neither unit has a clear advantage in this category. You get identical efficiency performance regardless of which model you choose for your build.
Cooling Technology
The cooling approaches differ due to size constraints. The ASUS ROG Loki 850W SFX-L Platinum uses a 120mm fan with PWM control to manage temperatures. It also features Lambda A Certification, ensuring noise levels stay below 25 dB. The ASUS ROG Strix 1200W Platinum utilizes a dual ball fan bearing design for longer lifespan and includes 0dB technology for silent operation during light gaming. The Loki focuses on low noise certification, while the Strix emphasizes bearing durability and silent idle modes. The Loki has a specific noise certification advantage.
Which PSU fits your build
Mini-ITX builders needing compact power
The ASUS ROG Loki 850W SFX-L Platinum measures just 4.9 by 4.9 by 2.5 inches. Its small footprint fits small cases. It delivers 850W of power with 80 PLUS Platinum efficiency. The 120mm fan keeps noise below 25 dB. Lambda A certification ensures stable performance in tight spaces without thermal throttling.
High-end gamers requiring max wattage
The ASUS ROG Strix 1200W Platinum provides 1200W of continuous power. It uses ATX 3.1 standards and GaN MOSFETs for superior efficiency. The GPU-first voltage sensing enhances delivery by up to 45%. Dual ball bearings offer longer lifespan. This unit suits systems with multiple high-draw components or future upgrades.
Users prioritizing quiet operation
The ASUS ROG Loki 850W SFX-L Platinum features Lambda A certification for low noise levels. Its 120mm PWM fan maintains temperatures while staying under 25 dB. The compact design allows better airflow in small enclosures. This makes it ideal for users who need silent computing without sacrificing 80 PLUS Platinum efficiency.
The products compared
ASUS ROG Loki 850W SFX-L Platinum PSU
Best for: compact builds needing ATX 3.0 support
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Platinum
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- 16-pin PCIe
- Fan Size
- 120mm
View on Amazon: ASUS ROG Loki 850W SFX-L Platinum PSU Affiliate link
The ASUS ROG Loki SFX-L 850W is a fully modular power supply designed for compact builds. It features ATX 3.0 compatibility and a bundled 16-pin PCIe cable for next-gen GPUs. The unit holds an 80 PLUS Platinum efficiency rating and Lambda A certification for noise levels below 25 dB. Its 120mm fan and ROG heatsinks help manage thermals. This unit suits users needing high power in a small form factor.
Pros
- ATX 3.0 compliant with 16-pin PCIe cable
- 80 PLUS Platinum efficiency rating
- Lambda A certified noise level below 25 dB
- 10-year warranty coverage
Cons
- Limited to 850W output compared to 1200W alternatives
- SFX-L form factor restricts case compatibility
- Heavier build at 4 pounds for its size
Good fit if
- You need ATX 3.0 support for PCIe Gen 5.0 graphics cards
- You are building in a small form factor case
- You require high efficiency and low noise operation
Skip if
- You need more than 850W of power
- You prefer a standard ATX size for larger cases
- You want a non-modular design for simplicity
Verdict: ASUS ROG Loki SFX-L 850W is a high-efficiency, low-noise power supply for compact builds requiring ATX 3.0 support. It fits users who need reliable power delivery in a small footprint without exceeding 850W.
ASUS ROG Strix 1200W Platinum PSU
Best for: High-end ATX builds needing 1200W
- Wattage
- 1200W
- Efficiency Rating
- 80 Plus Platinum
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- Warranty
- 10-Year
- Dimensions
- 6.3 × 5.9 × 3.4 inches
View on Amazon: ASUS ROG Strix 1200W Platinum PSU Affiliate link
This is a fully modular ATX power supply with 1200W capacity and 80 Plus Platinum efficiency. It uses GaN MOSFETs for better organization and cooler operation. The unit features GPU-first voltage sensing to enhance delivery to your graphics card. Large heatsinks help keep temperatures lower than reference designs. It is suitable for high-end builds needing robust power delivery.
Pros
- 1200W wattage capacity
- 80 Plus Platinum efficiency rating
- ATX 3.1 standard support
- GaN MOSFET technology for efficiency
- 10-year warranty coverage
Cons
- ATX form factor requires a larger case
- Dimensions are bulkier than SFX-L units
- Heavier build due to large heatsinks
Good fit if
- You need high wattage for extreme gaming
- You have a standard ATX case
- You want Platinum efficiency for lower heat
Skip if
- You are building in a small form factor case
- You need SFX-L compatibility
- You require a smaller physical footprint
Verdict: ASUS ROG Strix 1200W ATX is a high-capacity solution for enthusiasts who prioritize efficiency and voltage stability. It fits users with standard ATX cases who need reliable power for top-tier graphics cards.
Specifications side by side
| Spec | ASUS ROG Loki 850W SFX-L Platinum PSU | ASUS ROG Strix 1200W Platinum PSU |
|---|---|---|
| Wattage | 850W | 1200W |
| Efficiency Rating | 80 PLUS Platinum | 80 Plus Platinum |
| Modularity | Fully Modular | Fully Modular |
| ATX Version | ATX 3.0 | ATX 3.1 |
| PCIe Connector Type | 16-pin PCIe | not stated |
| Fan Size | 120mm | not stated |
| Warranty | 10 Year | 10-Year |
| Form Factor | ATX | ATX |
| Size | 850W | 1200W |
| Dimensions | 4.9 × 4.9 × 2.5 inches | 6.3 × 5.9 × 3.4 inches |
| Weight | 4 pounds | not stated |
| Color | ROG-LOKI-850P-SFX-L-GAMING | BLACK |
| Model | ROG-LOKI-850P-SFX-L-GAMING | ROG-STRIX-1200P-GAMING |
Frequently asked questions
Does the ASUS ROG Loki 850W support ATX 3.0?
Yes, the ASUS ROG Loki 850W SFX-L Platinum supports ATX 3.0. This version ensures compatibility with modern graphics cards and their power requirements. It delivers 850W of power in a compact SFX-L form factor. This makes it ideal for small form factor builds that need reliable, high-efficiency power delivery.
What ATX version does the ROG Strix 1200W use?
The ASUS ROG Strix 1200W Platinum uses the ATX 3.1 specification. This is a newer standard compared to ATX 3.0. It provides updated power delivery protocols for high-end components. The unit offers 1200W of capacity, making it suitable for systems with top-tier graphics cards and multiple high-power components.
How big is the ASUS ROG Loki 850W PSU?
The ASUS ROG Loki 850W measures 4.9 inches in width, 2.5 inches in height, and 4.9 inches in length. Its compact SFX-L design fits into smaller cases. The unit weighs 4 pounds. This small footprint allows for easier installation in mini-ITX builds where space is limited.
What are the dimensions of the ROG Strix 1200W?
The ASUS ROG Strix 1200W Platinum measures 5.9 inches in width, 3.4 inches in height, and 6.3 inches in length. It is larger than the Loki model. This standard ATX size fits most mid-tower and full-tower cases. The dimensions allow for better airflow and cooling for high-wattage components.
Is the ROG Loki 850W fully modular?
Yes, the ASUS ROG Loki 850W SFX-L Platinum is fully modular. You can connect only the cables you need for your build. This reduces clutter inside your case. It shares this feature with the ROG Strix 1200W, allowing for cleaner cable management in both compact and standard builds.
What efficiency rating do these power supplies have?
Both the ASUS ROG Loki 850W and the ROG Strix 1200W have an 80 PLUS Platinum efficiency rating. This means they convert AC power to DC power with high efficiency, reducing waste heat. Both units also feature fully modular cabling and come with a 10-year warranty from ASUS.