CORSAIR RM850e vs MSI MAG A1000GLS PCIE5 Power Supply Unit
Updated August 2026 — The CORSAIR RM850e offers a more economical choice with its fully modular design, while the MSI MAG A1000GLS provides superior efficiency and protection features. Depending on your needs, either could be a solid choice.
The CORSAIR RM850e offers a more economical choice with its fully modular design, while the MSI MAG A1000GLS provides superior efficiency and protection features. Depending on your needs, either could be a solid choice.
Why CORSAIR RM850e is better
lower price
CORSAIR RM850e costs £85.99
modular design
fully modular cabling for easier installation
ATX certification
Intel ATX 3.1 certified for modern compatibility
Why MSI MAG A1000GLS PCIE5 Power Supply Unit is better
higher efficiency
MSI MAG A1000GLS has 80 PLUS Gold certification
robust protection
features extensive protection mechanisms
power capacity
supports up to 600W for demanding GPUs
Overall score
Specifications
| Spec | CORSAIR RM850e | MSI MAG A1000GLS PCIE5 Power Supply Unit |
|---|---|---|
| Price | £85.99 | £104.99 |
| Efficiency | N/A | 80 PLUS Gold |
| Modular | Fully Modular | Native Connectors |
| Noise Level | Low | Low |
| Protection | Standard | Extensive |
Dimension comparison
Price Comparison
The CORSAIR RM850e is priced at £85.99, making it the more economical choice compared to the MSI MAG A1000GLS, which retails for £104.99. The price difference of £19 suggests that if budget is a primary concern, the CORSAIR RM850e could be more appealing to consumers looking for a reliable power supply without overspending. However, the higher price of the MSI MAG A1000GLS may be justified by its additional features and efficiency ratings, appealing to users with more demanding power needs.
Efficiency Ratings
The MSI MAG A1000GLS boasts an 80 PLUS Gold certification, which means it can achieve up to 90% efficiency under optimal conditions. This high efficiency is particularly beneficial for powering hardware with significant energy demands, such as high-end GPUs and CPUs. In contrast, the CORSAIR RM850e does not explicitly mention an efficiency rating but is Intel ATX 3.1 certified, ensuring it can handle transient power excursions from GPUs. While both power supplies are designed for efficiency, the MSI’s certification provides a clear advantage for energy-conscious consumers.
Modular Cabling
The CORSAIR RM850e features fully modular cabling, allowing users to connect only the cables necessary for their system build. This design not only simplifies installation but also improves airflow within the PC case. On the other hand, while the MSI MAG A1000GLS does not specify whether its cables are modular, it does come with native 12V-2x6 PCIe connectors aimed at supporting the latest PCIe 5.1 GPUs. Users who prefer a cleaner build and better cable management may favour the modular design of the CORSAIR RM850e.
Noise Levels
Noise levels are crucial for many users, especially those building systems for gaming or content creation. The CORSAIR RM850e employs a 120mm rifle bearing fan designed to keep noise levels low, even under full load, promoting a quieter computing environment. Conversely, the MSI MAG A1000GLS is equipped with a 135mm fluid-dynamic bearing fan, which similarly aims to maintain low noise levels, claiming to operate at the sound level of a peaceful night. Both power supplies are designed for low-noise operation, but the specific performance of their fans may vary depending on use cases and system configurations.
Build Quality and Design
In terms of build quality, the MSI MAG A1000GLS incorporates an LLC half-bridge with a DC-to-DC converter and active PFC design, providing multiple protection features such as overcurrent, over temperature, and short circuit protection. This robust design suggests a focus on delivering reliable performance over time. The CORSAIR RM850e, with its 105°C-rated capacitors, also promises steady and reliable power delivery, indicating high-quality components. Both power supplies appear well-designed, but the MSI’s extensive protection features may offer additional peace of mind for users concerned about system stability.
Compatibility and Future-Proofing
The CORSAIR RM850e is Intel ATX 3.1 certified, ensuring compatibility with the latest hardware standards and support for PCIe 5.1 platforms. This certification indicates that it can handle sudden power demands from modern GPUs effectively. Meanwhile, the MSI MAG A1000GLS is also designed specifically for PCIe 5.1 GPUs thanks to its native 12V-2x6 connectors. Both power supplies are well-suited for future-proofing, but the explicit ATX certification of the CORSAIR RM850e may lend it a slight edge for users prioritising compatibility with upcoming technology.
User Experience and Installation
Installation experience can significantly affect user satisfaction. The fully modular design of the CORSAIR RM850e allows for straightforward setup, as users can customise their cable connections according to their needs. This can lead to improved airflow and a tidier build. The MSI MAG A1000GLS, while compact at 150 mm in length and width, may not offer the same level of flexibility in cable management. Users may find the installation process more cumbersome if the cables are not modular. For those who value ease of installation and organisation, the CORSAIR RM850e is likely to be the more favourable option.
Which should you buy?
Choosing between the CORSAIR RM850e and the MSI MAG A1000GLS ultimately depends on your specific needs and budget. The CORSAIR RM850e stands out with its lower price of £85.99, fully modular design, and Intel ATX 3.1 certification, making it a solid choice for users seeking reliability and ease of installation. Conversely, the MSI MAG A1000GLS, priced at £104.99, offers impressive 80 PLUS Gold efficiency and robust protection features, appealing to those with higher power demands. If budget permits, the MSI may provide better long-term performance and efficiency, but for most users, the CORSAIR RM850e is a more accessible and versatile power supply option.
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