ASUS TUF Gaming 1200W Gold vs CORSAIR RM850x Fully Modular Low-Noise ATX Power
Updated August 2026 — ASUS TUF Gaming 1200W Gold wins on efficiency and build quality, CORSAIR RM850x Fully Modular Low-Noise ATX Power wins on noise level.
The ASUS TUF Gaming 1200W Gold excels in power capacity and build quality, while the CORSAIR RM850x offers excellent efficiency and a lower price. Choose based on your specific needs.
Why ASUS TUF Gaming 1200W Gold is better
Power Capacity
1200W vs 850W
Build Quality
Military-grade components
Warranty
10-year warranty
Why CORSAIR RM850x Fully Modular Low-Noise ATX Power is better
Price
$161.93 vs $204.99
Efficiency
Cybenetics Gold certification
Noise Level
Low-noise operation
Overall score
Specifications
| Spec | ASUS TUF Gaming 1200W Gold | CORSAIR RM850x Fully Modular Low-Noise ATX Power |
|---|---|---|
| Brand | ASUS | Corsair |
| Model | TUF Gaming 1200W Gold | RM850x |
| Certification | 80 Plus Gold | Cybenetics Gold |
| Fan Type | Dual Ball Bearing | 140mm FDB |
| Modular | Fully Modular | Fully Modular |
Dimension comparison
Overview of Power Supply Units
When it comes to power supplies, the ASUS TUF Gaming 1200W Gold and the CORSAIR RM850x are two compelling options. Both units are designed for high-performance PCs, but they cater to different needs and preferences. The ASUS TUF Gaming 1200W Gold is priced at $204.99, while the CORSAIR RM850x is available for $161.93, making it about 17% cheaper than its competitor.
Power Capacity
The power capacity is a significant differentiator between these two models. The ASUS TUF Gaming 1200W Gold boasts a maximum output of 1200 watts, making it suitable for high-end gaming rigs that require substantial power for multiple graphics cards and other components. In contrast, the CORSAIR RM850x delivers up to 850 watts, which is generally sufficient for most mid-range to high-end builds but may fall short for extreme configurations. Choosing the right power capacity will depend on your specific system requirements and future upgrade plans.
Efficiency Ratings
Efficiency is a crucial factor in power supplies, and both models perform admirably in this area. The ASUS TUF Gaming 1200W Gold is certified with an 80 Plus Gold rating, indicating high efficiency and lower energy waste. On the other hand, the CORSAIR RM850x also carries a Cybenetics Gold certification, rated for up to 91% efficiency, which suggests it may operate even more efficiently under certain conditions. However, both units are designed to minimize power consumption and heat generation, making them reliable options for any build.
Modular Design
Both power supplies feature a fully modular design, allowing users to connect only the cables they need for their specific setup. This is particularly advantageous for cable management and airflow within the PC case. The ASUS TUF Gaming 1200W Gold includes a 16-pin PCIe cable that can deliver up to 600W to PCIe Gen 5.0 graphics cards, which is particularly useful for users planning to run the latest GPUs. Meanwhile, the CORSAIR RM850x is designed with ultra-flexible embossed cables that simplify installation and connectivity. This focus on modularity helps both models reduce clutter and enhance overall system aesthetics.
Cooling Solutions
Effective cooling is essential for maintaining optimal performance and longevity in power supplies. The ASUS TUF Gaming 1200W Gold employs a dual ball bearing fan that can last up to twice as long as traditional sleeve bearings, which enhances durability and reliability. In contrast, the CORSAIR RM850x features a 140mm FDB fan designed for low noise operation, ensuring a quieter computing experience. Both cooling solutions reflect their respective brands' commitment to performance, catering to different preferences for noise levels and longevity.
Build Quality and Components
When comparing the build quality of these power supplies, the ASUS TUF Gaming 1200W Gold stands out with its military-grade components, which undergo rigorous testing to achieve certification. This focus on durability is complemented by a protective PCB coating that defends against moisture, dust, and extreme temperatures. The CORSAIR RM850x also emphasizes quality with its use of 100% Japanese 105°C-rated electrolytic capacitors, which contribute to its electrical performance. Both products reflect a strong commitment to quality, but the ASUS model leans more heavily into robust construction.
Warranty and Support
Warranty length can be an important consideration for many buyers. The ASUS TUF Gaming 1200W Gold offers an impressive 10-year warranty, providing significant reassurance regarding its longevity and reliability. Similarly, the CORSAIR RM850x is backed by a 10-year warranty as well, reflecting the manufacturer's confidence in their product. With both power supplies offering the same warranty period, customers can feel secure in their investment, knowing they have ample time to address any potential issues.
Which should you buy?
Deciding between the ASUS TUF Gaming 1200W Gold and the CORSAIR RM850x ultimately hinges on your specific needs and budget. If you require high wattage for a top-tier gaming setup with multiple components, the ASUS TUF Gaming 1200W Gold offers superior power capacity and robust build quality, albeit at a higher price point. Conversely, if you're looking for a reliable, cost-effective solution for a mid-range to high-end build, the CORSAIR RM850x presents a solid choice with excellent efficiency, lower noise, and modularity features, all at a more affordable price of $161.93. Both options come with a 10-year warranty, ensuring lasting support regardless of your choice.

