Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su vs CORSAIR RM650e
Updated August 2026 — The Gigabyte UD850GM PG5 ICE offers higher wattage and advanced protection features, while the Corsair RM650e is more budget-friendly and efficient for standard builds.
The Gigabyte UD850GM PG5 ICE offers higher wattage and advanced protection features, while the Corsair RM650e is more budget-friendly and efficient for standard builds.
Why Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su is better
Higher wattage
Gigabyte offers 850 watts compared to Corsair's 650 watts.
More protection features
Gigabyte includes OVP, OPP, SCP, UVP, OCP, and OTP.
Brand reputation
Gigabyte is known for high-performance power supplies.
Why CORSAIR RM650e is better
Lower price
Corsair is priced at £79.99, £19.62 cheaper than Gigabyte.
Compact size
Corsair has a shorter 140mm length.
Quiet operation
Corsair's fan is designed for low noise even under load.
Overall score
Specifications
| Spec | Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su | CORSAIR RM650e |
|---|---|---|
| Modularity | Fully modular | Fully modular |
| Efficiency Rating | 80 PLUS Gold | 80 PLUS Gold |
| Cooling Fan | Hydraulic bearing | Articulating bearing |
| Protection Features | Comprehensive | Reliable |
| Brand | Gigabyte | Corsair |
Dimension comparison
Price Comparison
When comparing the prices of the Gigabyte UD850GM PG5 ICE and the Corsair RM650e, there is a clear difference. The Gigabyte UD850GM PG5 ICE is priced at £99.61, while the Corsair RM650e is more affordable at £79.99. This represents a notable price difference of £19.62, making the Corsair option more budget-friendly for consumers looking for a reliable power supply. However, the higher price of the Gigabyte model may reflect its greater wattage capacity and additional features intended for high-performance systems.
Power Output
The power output is a crucial factor when choosing a power supply, and here the Gigabyte UD850GM PG5 ICE has a significant advantage with its 850 watts. In contrast, the Corsair RM650e offers a power output of 650 watts. This 200-watt difference means that the Gigabyte is better suited for high-performance builds that require more power, especially when using high-end graphics cards or multiple components. For users with less demanding systems, the Corsair's 650 watts might be sufficient, but those looking to future-proof their setups may lean towards the higher output of the Gigabyte model.
Efficiency Rating
Both the Gigabyte UD850GM PG5 ICE and the Corsair RM650e boast impressive efficiency ratings, with both units achieving 80 PLUS Gold certification. This certification indicates that both power supplies offer high energy efficiency, ensuring that less energy is wasted as heat and more is used to power your components. Investing in a Gold-rated power supply can lead to lower electricity bills and a more environmentally-friendly setup. Therefore, in terms of efficiency, both products stand on equal footing, providing excellent performance without excessive power loss.
Design and Modularity
In terms of design, the Gigabyte UD850GM PG5 ICE features a fully modular design that allows users to connect only the necessary cables, reducing clutter within the PC case and enhancing airflow. The Corsair RM650e also offers a fully modular setup, making it equally user-friendly for cable management. Both units are designed to be compact, with the Corsair boasting a slightly shorter 140mm length compared to the Gigabyte's unspecified but compact size. This compact design ensures compatibility with a wide range of cases, making both power supplies suitable for various builds.
Cooling Performance
Cooling performance is essential for maintaining optimal operation in demanding environments. The Gigabyte UD850GM PG5 ICE is equipped with a 120mm smart hydraulic bearing fan that optimises thermal performance. Meanwhile, the Corsair RM650e features a 120mm articulating bearing fan with a specially calculated fan curve, ensuring low noise levels even under full load. Both fans are designed to keep the power supplies cool and operational without excessive noise, which is an essential consideration for gamers and professionals who prefer a quiet workspace.
Protection Features
When it comes to protection features, the Gigabyte UD850GM PG5 ICE includes several advanced safety measures, such as OVP (Over Voltage Protection), OPP (Over Power Protection), SCP (Short Circuit Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), and OTP (Over Temperature Protection). This comprehensive suite of protections provides peace of mind for users, ensuring that their components remain safe from electrical faults. The Corsair RM650e also includes reliable protections, with a focus on maintaining steady power delivery with its 105℃ rated capacitors. While both units provide significant protection, the Gigabyte offers a broader range of safety features.
Brand Reputation and Warranty
Both Gigabyte and Corsair are well-established brands in the power supply market, known for their quality and reliability. The Gigabyte UD850GM PG5 ICE is backed by a solid reputation for performance in high-end builds, while the Corsair RM650e also enjoys a strong following for its efficiency and quiet operation. Corsair offers a seven-year warranty, which is a testament to its confidence in the product's longevity and reliability. While warranty specifics for the Gigabyte model were not mentioned, the brand is renowned for its robust customer support and product quality, adding to its appeal.
Which should you buy?
Ultimately, the choice between the Gigabyte UD850GM PG5 ICE and the Corsair RM650e depends on individual needs and preferences. If you require a higher wattage for a demanding system and value advanced protection features, the Gigabyte UD850GM PG5 ICE is worth the higher price of £99.61. However, if you are looking for a more budget-friendly option that still offers solid performance for standard builds, the Corsair RM650e at £79.99 is an excellent choice. Each power supply has its strengths, making them suitable for different types of users, from gamers to professionals.
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