Key Features

1. Wattage: 850 Watts
2. Certification: 80 Plus Gold
3. Modularity: Fully modular
4. Cooling: Zero RPM fan mode
5. Warranty: 10 years

Build Quality and Design

• Materials: The RM850x is built with high-quality components, including Japanese capacitors rated at 105°C, ensuring longevity and reliability.
• Modular Cables: Being fully modular, the PSU allows users to connect only the cables they need, improving cable management and airflow within the case.
• Aesthetic: The PSU has a clean, sleek design with a matte black finish, fitting well with most PC builds.

Performance

• Efficiency: The 80 Plus Gold certification ensures that the PSU operates with high efficiency (up to 90% efficiency under typical loads). This means less wasted energy and lower electricity bills.
• Power Delivery: With a continuous output of 850W, the RM850x can handle high-end components, including overclocked CPUs and GPUs, without any issues.
• Voltage Regulation: The RM850x offers excellent voltage regulation, maintaining stable output even under heavy loads.

Cooling

• Zero RPM Fan Mode: The PSU features a Zero RPM fan mode that allows the fan to remain off during low to moderate loads, resulting in silent operation. When the fan does spin up, it’s controlled by a thermally activated fan curve, ensuring efficient cooling with minimal noise.
• Fan Quality: The 135mm ML (Magnetic Levitation) fan is durable and designed to provide high airflow with low noise.

Installation and Use

• Ease of Installation: Thanks to its fully modular design, the RM850x is easy to install, with no unnecessary cables cluttering the case.
• Cable Quality: The included cables are of high quality, flexible, and easy to route, contributing to a clean build.
• Longevity: High-quality components and a robust design make the RM850x a reliable choice for long-term use.
• Warranty: Corsair offers a 10-year warranty, reflecting their confidence in the PSU’s durability and performance.

Pros

1. High Efficiency: 80 Plus Gold certification ensures low energy waste and high efficiency.
2. Quiet Operation: The Zero RPM fan mode and efficient cooling keep noise levels very low.
3. Excellent Build Quality: Premium components, including Japanese capacitors, ensure reliability and longevity.
4. Modular Design: Fully modular cables make for easy installation and better cable management.
5. Strong Warranty: The 10-year warranty provides peace of mind and signifies trust in the product’s durability.

Cons

1. Price: The RM850x is priced higher than some other 850W PSUs, though its features and build quality justify the cost.
2. Cable Length: For larger cases, the length of the cables might be a bit short, requiring careful routing.