ASUS ROG Thor 1200W Platinum III PSU vs Lian Li SX1200P Platinum Compact ATX Form Factor
Updated August 2026 — ASUS ROG Thor 1200W Platinum III PSU wins on power delivery and features, Lian Li SX1200P Platinum Compact ATX Form Factor wins on noise level.
The ASUS ROG Thor offers superior efficiency and advanced features, while the Lian Li SX1200P provides excellent value for budget-conscious consumers.
Why ASUS ROG Thor 1200W Platinum III PSU is better
Price
ASUS is more expensive but offers advanced features.
Efficiency
ASUS has GaN MOSFET technology for better power efficiency.
Cooling
ASUS features advanced cooling technology with Turbo Mode.
Why Lian Li SX1200P Platinum Compact ATX Form Factor is better
Affordability
Lian Li is significantly cheaper.
Compact Design
Lian Li has a compact form factor.
Silent Operation
Lian Li features a fanless mode at low loads.
Overall score
Specifications
| Spec | ASUS ROG Thor 1200W Platinum III PSU | Lian Li SX1200P Platinum Compact ATX Form Factor |
|---|---|---|
| Power | 1200W | 1200W |
| Certification | 80 PLUS Platinum | 80 PLUS Platinum |
| Cooling Tech | Turbo Mode | Fanless Mode |
| Cables | Modular | Full Modular |
| Capacitors | Low-ESR | 105°C-rated |
Dimension comparison
Price Comparison
In terms of price, the Lian Li SX1200P Platinum is significantly more affordable than the ASUS ROG Thor 1200W Platinum III PSU. The Lian Li is priced at $159.99, while the ASUS model comes in at $432.35, making the ASUS about 170% more expensive. This stark difference may appeal to budget-conscious consumers who still want a high-quality power supply. The Lian Li offers a great option for those looking for performance without breaking the bank, especially given that both options are 80 PLUS Platinum certified.
Efficiency and Power Delivery
Both the ASUS ROG Thor and the Lian Li SX1200P are 80 PLUS Platinum certified, ensuring high energy efficiency. However, the ASUS ROG Thor stands out with its GaN MOSFET technology, which delivers up to 30% more power efficiency compared to standard MOSFETs. This translates to not only better performance but also a cooler operation, which is crucial for high-performance systems. The Lian Li also boasts excellent efficiency, achieving up to 92% at 50% load, but it does not have the same advanced technology as the ASUS model for maximizing power delivery.
Build Quality and Components
When it comes to build quality, the ASUS ROG Thor features premium components such as ROG heatsinks and a fully aluminum enclosure that enhance cooling efficiency. These features ensure that the PSU maintains optimal temperatures even during heavy loads. In contrast, the Lian Li SX1200P utilizes 100% Japanese 105°C-rated capacitors, which provide excellent durability and stable performance under thermal stress. While both power supplies are built to last, the ASUS model offers a more robust construction aimed at high-performance gaming setups.
Cooling Technology
The ASUS ROG Thor employs advanced cooling technology, including dual-ball fan bearings that can last up to twice as long as traditional sleeve bearings. Additionally, it features a Turbo Mode that unlocks support for extended power excursions, enhancing performance during intense gaming sessions. Conversely, the Lian Li SX1200P is equipped with smart cooling technology that includes a fanless mode at low loads, allowing for silent operation. While both units have effective cooling solutions, the ASUS model has a more aggressive approach to cooling, making it better suited for high-demand environments.
Cable Management and Connectivity
The ASUS ROG Thor includes etched modular cables made from a pliable premium material that enhances cable management and safety. This design allows for a cleaner setup, which is often crucial in high-performance builds. The Lian Li SX1200P also emphasizes cable management with its flexible braided cables, making it easier to reduce clutter and improve airflow in tight spaces. Both power supplies provide ample connectivity options, but the ease of management may tip the scales for users who prioritize aesthetics and organization in their builds.
Warranty and Support
Both the ASUS ROG Thor and the Lian Li SX1200P come with a generous 10-year warranty, which speaks volumes about the manufacturers’ confidence in their products. ASUS offers ROG-specific support, while Lian Li provides assistance for missing parts or cable color issues. This level of support ensures that consumers can rely on either brand for long-term service and assistance, which is a crucial factor for anyone investing in premium hardware.
User Experience and Reviews
While specific sales ranks for these models are not provided, the ASUS ROG Thor is generally recognized for its premium features and performance, often appealing to gamers and high-end users. The Lian Li SX1200P, on the other hand, is noted for its compact design and value, making it a favorite among users looking for a balance between performance and cost. User experiences often highlight the reliability of both models, but ASUS might have an edge in terms of perceived quality due to its advanced technology and features.
Which should you buy?
Choosing between the ASUS ROG Thor 1200W Platinum III PSU and the Lian Li SX1200P Platinum ultimately comes down to your needs and budget. If you’re looking for superior efficiency, advanced cooling technology, and premium build quality, the ASUS ROG Thor, albeit at a much higher price of $432.35, is an excellent choice. However, if you’re more budget-conscious and require a solid power supply without the frills, the Lian Li SX1200P, priced at $159.99, offers great value without sacrificing essential performance.

