CORSAIR RM850x Fully Modular Low-Noise ATX Power Supply vs CORSAIR RM1200x SHIFT Fully Modular ATX Power Supply - 80 PLUS Gold - ATX 3.1 -

Overview of the Power Supplies

The CORSAIR RM850x and the CORSAIR RM1200x SHIFT are both high-quality fully modular ATX power supplies, yet they cater to different needs and budgets. The RM850x is priced at £124.40, while the RM1200x SHIFT is a premium option at £174.98. Their features reflect their respective price points, with the RM1200x SHIFT offering innovative design aspects that enhance usability and performance.

Design and Connectivity

The design of these power supplies significantly influences their installation and cable management. The RM850x features fully modular cabling, allowing users to connect only the cables necessary for their system. Conversely, the RM1200x SHIFT introduces an innovative easy-access connection position, which places modular connections on the side of the PSU. This design not only simplifies cable management but also facilitates easier access during installation and maintenance, making it a more user-friendly option.

Efficiency and Performance

Efficiency is a crucial factor for power supplies, and both models excel in this regard. The RM850x is Cybenetics Gold-Certified, boasting an efficiency rating of up to 91%. This high efficiency translates to lower power consumption and reduced heat generation. On the other hand, the RM1200x SHIFT is also Intel ATX 3.1 certified, supporting the latest technology standards. Although the RM850x has a solid efficiency rating, the RM1200x SHIFT employs 100% 105°C-rated Japanese electrolytic capacitors, which contribute to its reliability and sustained performance over time.

Cooling Technology

Cooling is vital for maintaining optimal performance in power supplies, and both models utilise advanced fan technology. The RM850x is designed with a low-noise operation in mind, featuring a well-calibrated fan that ensures minimal noise while delivering reliable performance. In contrast, the RM1200x SHIFT includes a 140mm fluid dynamic bearing fan, designed to operate quietly while providing superior airflow. The fan curve for the RM1200x SHIFT is specially calculated for high performance and low noise, making it a potentially quieter option under load.

Cable Management

Effective cable management can make a significant difference in a build’s aesthetics and airflow. The RM850x features embossed cables with low-profile combs that not only enhance the look of your setup but also make installation more manageable. The RM1200x SHIFT’s side-mounted connection design further simplifies cable management, allowing for cleaner builds with less clutter. The fully modular micro-fit PSU connectors in the RM1200x SHIFT take up less space, contributing to a more organised interior.

Compatibility with Modern Standards

Both power supplies are compliant with the ATX 3.1 standard, which is essential for supporting the latest hardware, such as PCIe 5.1 graphics cards. The RM850x includes a native 12V-2x6 connector, ensuring compatibility with modern GPUs without requiring additional adapters. The RM1200x SHIFT matches this compliance while also resisting transient power spikes, a feature that is particularly important for high-performance systems that demand stability and reliability in power delivery.

Target Audience

The target audience for each power supply varies based on their specifications and price points. The RM850x is ideal for gamers and PC builders who require a reliable, efficient power supply without breaking the bank. It provides excellent performance for most mid-to-high-end systems. Conversely, the RM1200x SHIFT is designed for enthusiasts and professionals who demand higher wattage and more advanced features. Its innovative design and premium components justify the higher price tag, making it suitable for high-performance builds and overclocking scenarios.

Which should you buy?

Choosing between the CORSAIR RM850x and the CORSAIR RM1200x SHIFT ultimately depends on your specific needs and budget. If you’re looking for a cost-effective, reliable power supply with solid performance for a gaming rig or general use, the RM850x at £124.40 is a strong contender. However, if you desire cutting-edge features, superior cooling, and enhanced usability for a high-end system, the RM1200x SHIFT at £174.98 offers significant advantages that may justify the extra investment.