CORSAIR SF850 vs CORSAIR RM750e

Overview of the CORSAIR SF850 and CORSAIR RM750e

The CORSAIR SF850 and CORSAIR RM750e are two power supplies that cater to different needs in the PC building landscape. Priced at £149.99, the SF850 is designed for high-performance small-form-factor builds, while the RM750e offers a more budget-friendly option at £81.99. Both power supplies boast compliance with the ATX 3.1 standard, but they differ significantly in form factor, power capacity, and intended use.

Performance Capabilities

The CORSAIR SF850 features a robust 850 watts of power, making it ideal for high-demand systems that require substantial energy, particularly in compact builds. In contrast, the CORSAIR RM750e delivers 750 watts, which is still considerable but may not suffice for the most power-hungry components. Both units support the PCIe 5.1 platform, but the SF850’s higher wattage gives it an edge in accommodating high-end GPUs and CPUs, especially in situations with transient power spikes.

Form Factor and Design

The SF850 is designed in a compact SFX form-factor, making it suitable for small-form-factor PCs. This design allows for efficient use of space within a case, which is paramount for users prioritising compact builds. On the other hand, the RM750e follows the traditional ATX form factor, providing flexibility for larger builds but lacking the space-saving benefits that the SF850 offers. Users with smaller cases will find the SF850 particularly advantageous due to its size.

Modular Cabling

Both the CORSAIR SF850 and RM750e feature fully modular cabling, which allows users to connect only the cables needed for their specific build. This not only enhances cable management but also promotes airflow within the case. However, the SF850 utilises Type-5 Micro-Fit PSU connectors, which are designed for more compact builds, enhancing the usability for SFX applications. The RM750e’s standard modular connectors are reliable but may not provide the same level of space efficiency.

Cooling Solutions

Cooling is a critical aspect of power supply performance, and both units employ different fan designs. The SF850 is equipped with a 92mm PWM cooling fan, which is known for its ability to deliver powerful cooling while maintaining low noise levels. Conversely, the RM750e uses a 120mm rifle bearing fan, which is designed to minimise noise even under full load. Users prioritising quiet operation might lean towards the RM750e, while those needing efficient cooling in a compact space might prefer the SF850.

Reliability and Components

When it comes to reliability, both power supplies feature 105°C rated Japanese capacitors, ensuring steady and dependable power delivery. This is critical for maintaining optimal performance in demanding situations. The SF850's design includes features that resist transient power spikes, making it particularly suitable for high-performance setups. The RM750e, while still reliable, is primarily geared towards standard builds without the extreme transient handling capabilities of the SF850.

Pricing and Value

In terms of pricing, the CORSAIR SF850 is substantially more expensive at £149.99 compared to the RM750e’s more accessible price of £81.99. This £68 difference reflects the SF850’s higher power rating and compact form-factor benefits. For users on a tighter budget or those with less demanding systems, the RM750e presents a compelling value proposition, offering solid performance at a lower price point.

User Experience and Compatibility

The user experience with both power supplies is enhanced by their modular designs, allowing for easy installation and customisation based on individual needs. The SF850 is particularly suitable for users looking to build powerful, compact systems, while the RM750e is ideal for those who may not need the highest wattage. Compatibility with the latest components is assured in both units, but the SF850 may provide a better experience for those utilising cutting-edge hardware that demands more from their power supply.

Which should you buy?

Choosing between the CORSAIR SF850 and CORSAIR RM750e ultimately hinges on your specific needs. If you are building a high-performance, compact PC and require a power supply that can handle demanding components, the SF850 is worth the investment at £149.99. However, if you are looking for a reliable, cost-effective solution for a standard build, the RM750e at £81.99 offers excellent value without sacrificing essential features. Your choice will depend on your power requirements, budget, and the size of your case.