Corsair RM850x (2021) 850W – The Gold Standard in Power Supplies


When it comes to building a high-performance gaming PC, a reliable and efficient power supply unit (PSU) is essential. The Corsair RM850x (2021) 850W power supply has been making waves in the PC building community as the gold standard in PSUs. With its impressive features, top-notch performance, and unrivaled efficiency, it has quickly become a favorite among gamers and enthusiasts. In this review, we’ll delve deep into the Corsair RM850x (2021) 850W PSU to uncover what makes it the go-to choice for demanding PC builds.

Unboxing and First Impressions

The Corsair RM850x (2021) comes packaged in an elegant box that reflects the premium quality of the product inside. Opening the box reveals a neatly arranged set of accessories, including modular cables, mounting screws, and a user manual. The PSU itself exudes quality, thanks to its matte black finish and minimalistic design, making it a perfect fit for any build.

Wattage and Efficiency

The Corsair RM850x boasts a robust 850-watt power rating, making it suitable for even the most power-hungry gaming rigs. This ample wattage ensures that your system can handle demanding components, including high-end graphics cards, multiple storage drives, and overclocked processors, without breaking a sweat. Moreover, this PSU is 80 PLUS Gold certified, which means it operates at an impressive efficiency of over 90%, reducing energy waste and lowering your electricity bills.

Modular Design

One of the standout features of the RM850x is its fully modular design. Modular PSUs allow you to connect only the cables you need, minimizing cable clutter and improving airflow within your PC case. The RM850x includes a variety of modular cables for different components, ensuring compatibility with various setups. This flexibility not only simplifies cable management but also enhances the overall aesthetics of your build.

Silent Operation

Corsair has paid meticulous attention to noise reduction in the RM850x. Equipped with a 135mm fluid dynamic bearing fan, this PSU offers quiet and efficient cooling. Under low to moderate loads, the fan remains virtually silent, ensuring a peaceful computing experience. It only kicks into high gear when the PSU is under heavy load or experiencing high temperatures, keeping your system cool without disturbing your gaming sessions.

Corsair Link Integration

Corsair Link is a software utility that allows you to monitor and control various Corsair components, including the RM850x PSU. This integration enables real-time monitoring of power consumption, fan speed, and temperature. You can even customize the fan curve to suit your preferences, balancing performance and acoustics. The ability to fine-tune your PSU’s behavior adds an extra layer of control to your PC build.

Premium Build Quality

Corsair is renowned for its commitment to quality, and the RM850x is no exception. It features 100% Japanese capacitors, which are known for their reliability and durability. This ensures stable power delivery and longevity, making the RM850x a sound investment for your PC. Additionally, the PSU is backed by a generous 10-year warranty, showcasing Corsair’s confidence in its product.

Overcurrent and Overvoltage Protection

The RM850x offers comprehensive protection for your PC components. It incorporates overcurrent and overvoltage protection circuits to safeguard against power surges and voltage fluctuations. This extra layer of security helps prevent damage to your expensive hardware, giving you peace of mind during prolonged gaming sessions or heavy workloads.

Compatibility and Cable Length

The Corsair RM850x is compatible with the latest ATX12V v2.52 and EPS 2.92 standards, ensuring broad compatibility with modern motherboards and components. Moreover, the included cables are of ample length, making it easy to route them in larger PC cases. Cable quality is excellent, with a flat, low-profile design that further aids cable management.

Price and Value

While the Corsair RM850x may be priced slightly higher than some other PSUs in the market, its premium features, outstanding performance, and 10-year warranty make it an excellent long-term investment. Considering the reliability and efficiency it offers, the RM850x provides exceptional value for those seeking a top-tier power supply for their gaming or professional rig.


The Corsair RM850x (2021) 850W power supply unit has firmly established itself as the gold standard in power supplies for PC enthusiasts and gamers alike. Its combination of high wattage, efficiency, modular design, silent operation, Corsair Link integration, premium build quality, and comprehensive protection features make it a top choice for demanding PC builds.

Corsair’s commitment to quality is evident in every aspect of the RM850x, from its 80 PLUS Gold certification to its 10-year warranty. While it may come at a slightly higher price point, the long-term reliability and peace of mind it offers justify the investment.

Whether you’re building a high-performance gaming PC or a professional workstation, the Corsair RM850x is undoubtedly one of the best PSU options available, setting the gold standard for power supplies in the industry.

Thank you: dobest4you

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