CORSAIR RM750e ATX 3.1 PCIe 5.1 Ready Fully Modular 750W Power Supply – 12V-2x6 Cable Included, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black vs Redragon RGPS-850W 80+ Gold 850 Watt Power Supply w/Upgraded ATX 3.1 & PCIe 5.1 Fully Modular, 12VHPWR Cable Included, 100% Japanese Capacitors, Smart ECO Low Noise RGB Fan, Compact 160mm Size

Price & Value Comparison

The Redragon RGPS-850W is $35.00 more expensive than the Corsair RM750e, representing about 39% higher cost for a 100W increase in wattage. At $124.99 versus $89.99, the Redragon model carries a significant price premium despite delivering only 100W more power. The Corsair RM750e offers a lower entry point with a proven track record in reliability and efficiency, while the Redragon’s higher price comes with additional features like RGB lighting and a compact design—features not present in the Corsair’s offering.

Wattage & Power Delivery

The Redragon RGPS-850W delivers 850 watts of power, 100 watts more than the Corsair RM750e’s 750-watt rating. This extra capacity supports higher-end systems, particularly those with demanding GPUs like the NVIDIA RTX 4090 or upcoming 50-series cards. Both units are designed to handle PCIe 5.1 and ATX 3.1 standards, but the Redragon explicitly states support for 200% total power excursion and 300% GPU power excursion—capabilities that exceed standard requirements. The Corsair RM750e includes a native 12V-2x6 cable and dual 8-pin PCIe connectors, sufficient for most high-performance builds, though it doesn’t specify excursions beyond compliance.

Efficiency & Certification

Both power supplies carry an 80 Plus Gold certification, ensuring efficient energy conversion and reduced heat output. The Corsair RM750e is described as Cybenetics Gold efficiency, a branding term indicating high performance under load. The Redragon RGPS-850W also uses the 80 Plus Gold label, emphasizing cooler case temperatures and lower noise. While both meet the same efficiency tier, the Corsair’s use of industrial-grade 105°C-rated capacitors may offer better long-term stability under stress compared to the Redragon’s claim of 100% Japanese capacitors—though no direct comparison of lifespan or thermal behavior is provided.

Cooling & Noise Performance

The Corsair RM750e features a 120mm rifle bearing fan with a specially calculated fan curve designed to minimize noise even at full load. It operates quietly under normal conditions, though its fan does not mention a zero RPM mode. In contrast, the Redragon RGPS-850W includes a Zero RPM Mode fan that remains off until temperatures reach 60°C, enabling silent operation during low-load scenarios. This feature gives the Redragon a clear advantage in quietness during idle or light workloads, especially in environments where minimal background noise is critical.

Build Quality & Components

The Corsair RM750e uses 105°C-rated capacitors, which are known for improved longevity and performance under thermal stress. These components are paired with a seven-year warranty, signaling confidence in durability. The Redragon RGPS-850W claims 100% Japanese capacitors, often associated with superior quality and reliability. Both units emphasize robust construction, but the Corsair’s inclusion of a seven-year warranty provides a tangible benchmark for long-term support, whereas the Redragon’s warranty duration is not specified in the provided data.

Modularity & Cable Management

Both power supplies are fully modular, allowing users to connect only the cables needed for their build. The Corsair RM750e includes flat cables, which reduce clutter and improve airflow. The Redragon RGPS-850W also uses flat fully modular cables, enhancing cable management and thermal performance. The Corsair’s package includes a 12V-2x6 cable and a dual 8-pin PCIe adapter, while the Redragon includes a dedicated 12VHPWR cable—essential for next-gen GPUs. The Redragon’s inclusion of this cable directly addresses compatibility with newer high-power graphics cards, giving it a practical edge in future-proofing.

Size & Compatibility

The Corsair RM750e has a 140mm-long casing, which fits nearly any modern case. The Redragon RGPS-850W is specifically noted as having a compact 160mm size, which may seem larger but likely refers to depth rather than length. However, the description emphasizes “better and wider chassis compatibility” due to its compact form factor, suggesting it may fit in tighter cases. The Redragon’s smaller footprint could be advantageous in mini-ITX or compact builds, though exact dimensions aren’t provided for direct comparison.

Which should you buy?

Choose the Corsair RM750e if you want a reliable, efficient, and well-established power supply at $89.99—about 39% cheaper than the Redragon. It offers solid performance with 105°C-rated capacitors, a seven-year warranty, and full modularity, making it ideal for mainstream high-performance builds without needing RGB or extreme compactness. Opt for the Redragon RGPS-850W only if you require 850 watts of power, need a 12VHPWR cable included, and value a Zero RPM fan for silent operation. Despite being $35.00 more expensive, it adds future-ready features like enhanced power excursions and RGB lighting—benefits that justify the cost only for users prioritizing cutting-edge compatibility and aesthetics over pure value.