CORSAIR RM650e vs Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su
Updated August 2026 — The CORSAIR RM650e offers great value and quiet operation for mid-range builds, while the Gigabyte UD850GM PG5 ICE excels with higher power capacity and advanced protections for demanding systems.
The CORSAIR RM650e offers great value and quiet operation for mid-range builds, while the Gigabyte UD850GM PG5 ICE excels with higher power capacity and advanced protections for demanding systems.
Why CORSAIR RM650e is better
Price
CORSAIR RM650e costs £71.57 vs £99.61 for Gigabyte
Noise
CORSAIR uses a 120mm rifle bearing fan focused on quiet operation
Capacitor Temp
CORSAIR has 105°C-rated capacitors vs Gigabyte's 100% Japanese capacitors
Why Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su is better
Power Capacity
Gigabyte provides 850W vs 650W for CORSAIR
Protection Features
Gigabyte offers OVP, OCP, OTP and other protections beyond CORSAIR's modern standby
Certifications
Gigabyte supports Intel ATX 3.1 and PCIe Gen 5.1 vs CORSAIR's Intel ATX 3.1 only
Overall score
Specifications
| Spec | CORSAIR RM650e | Gigabyte UD850GM PG5 ICE 80 Plus Gold Fully Modular 850w PCIe 5.0 White Power Su |
|---|---|---|
| Wattage | 650W | 850W |
| Modular | Fully Modular | Fully Modular |
| Certification | Intel ATX 3.1 | Intel ATX 3.1, PCIe Gen 5.1 |
| Fan Type | 120mm rifle bearing | 120mm smart hydraulic bearing |
| Capacitors | 105°C-rated | 100% Japanese |
| Protection | Modern Standby | OVP, OPP, SCP, UVP, OCP, OTP |
| Price | £71.57 | £99.61 |
Dimension comparison
Price Comparison
The CORSAIR RM650e is priced at £71.57, while the Gigabyte UD850GM PG5 ICE is more expensive at £99.61. This presents a significant price difference of £28.04 between the two power supplies. For budget-conscious consumers, the CORSAIR RM650e offers a more economical option without sacrificing essential features. However, the higher price of the Gigabyte UD850GM PG5 ICE may reflect its additional power capacity and advanced specifications, appealing to those with more demanding power needs.
Power Capacity
The CORSAIR RM650e provides a maximum output of 650 watts, which is adequate for most mid-range systems. In contrast, the Gigabyte UD850GM PG5 ICE boasts a higher capacity of 850 watts. This additional power output makes the Gigabyte model a better choice for high-performance systems, particularly those with powerful GPUs or multiple components that require substantial power. If your setup demands more headroom for overclocking or future upgrades, the Gigabyte UD850GM PG5 ICE is the superior option.
Modular Design
Both the CORSAIR RM650e and the Gigabyte UD850GM PG5 ICE feature fully modular designs. This allows users to connect only the cables necessary for their system, improving airflow and reducing cable clutter within the case. The CORSAIR model is praised for its reliable and efficient power delivery, while the Gigabyte unit also touts a compact size, making it easier to fit in various cases. The modularity of both products enhances the user experience, but the additional compactness of the Gigabyte may appeal to those with limited space.
Certification Standards
The CORSAIR RM650e is Intel ATX 3.1 certified, ensuring it meets the latest standards in power supply technology. The Gigabyte UD850GM PG5 ICE matches this with its Intel ATX 3.1 and PCIe Gen 5.1 readiness. Both units are designed to handle the latest hardware, including GPUs that may require higher transient power. The certification of both products assures consumers of their reliability, particularly in demanding gaming or computational scenarios, making either choice a safe bet for modern builds.
Fan and Noise Levels
The CORSAIR RM650e is equipped with a 120mm rifle bearing fan that maintains quiet operation, even under full load. This is particularly beneficial for users who prioritise a silent computing experience. Conversely, the Gigabyte UD850GM PG5 ICE employs a 120mm smart hydraulic bearing fan, which provides an optimised thermal solution. While both fans are designed to manage heat efficiently, the CORSAIR's focus on low noise may be a deciding factor for users who require a quieter environment, such as in home offices or media setups.
Build Quality and Components
The CORSAIR RM650e is built with 105°C-rated capacitors, which are known to enhance reliability and longevity. This is crucial for maintaining steady power delivery and overall performance. On the other hand, the Gigabyte UD850GM PG5 ICE uses 100% Japanese capacitors, which are highly regarded for their quality and stability. While both power supplies utilise premium components, the slight edge in temperature rating for the CORSAIR unit might appeal to users who plan to push their systems to the limits, ensuring consistent performance over time.
Protection Features
Both power supplies come with a range of protective features to safeguard against various electrical issues. The CORSAIR RM650e includes modern standby compatibility, allowing for quick wake-from-sleep times and improved low-load efficiency. In comparison, the Gigabyte UD850GM PG5 ICE offers a comprehensive suite of protections including over voltage protection (OVP), over current protection (OCP), and over temperature protection (OTP). While both models prioritise safety, the Gigabyte’s extensive protections may provide added peace of mind for users concerned about power surges or other potential electrical hazards.
Which should you buy?
Choosing between the CORSAIR RM650e and the Gigabyte UD850GM PG5 ICE ultimately depends on your specific needs and budget. If you're looking for a cost-effective solution with solid performance for a mid-range setup, the CORSAIR RM650e is an excellent choice at £71.57. However, if your system demands higher power capacity and you are willing to invest more for additional features and protections, the Gigabyte UD850GM PG5 ICE at £99.61 stands out with its 850 watts and comprehensive safety measures. Consider your power requirements and budget to make the best decision for your build.
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