Corsair
RM Series RM450
Best quiet power supply for compact, energy-efficient desktop builds.
The CORSAIR RM450 is a fully modular power supply unit designed for silence and efficiency. It boasts an 80 PLUS Gold certification, ensuring reliable power delivery with minimal energy waste. The flat black modular cables simplify installation and cable management for a clean build. With a 140mm fan featuring a rifle bearing and zero RPM mode, it operates quietly, spinning up only when needed. This ATX form factor PSU is compatible with ATX12V v2.4 and EPS12V 2.92 standards, offering a continuous power output of 450 Watts.
$109.99
Owner Satisfaction
4.5
/ 5
Category Rank
321
/ 1062
#321 in Computer Power Supplies
Price vs Category Average
-88%
Below average
EPS Connector
1
Who it's for
- Eco-conscious users looking to lower long-term electricity costs
- Quiet-computing enthusiasts building noise-sensitive home office PCs
- System builders prioritizing clean aesthetics and optimal internal airflow
Who should skip it
- Gamers planning to install power-hungry high-end graphics cards
- Budget-focused shoppers seeking the most affordable wattage per dollar
- Basic PC owners who do not require premium modular features
Performance breakdown
Energy Efficiency
Gold certification ensures minimal power waste during high-demand computing tasks.
Acoustic Performance
Zero RPM mode keeps the system virtually silent during light workloads.
Cable Management
Fully modular design and flat cables make for a clutter-free build.
Build Reliability
High MTBF rating and a five-year warranty provide long-term peace of mind.
Installation Ease
Standard ATX form factor ensures compatibility with most modern computer cases.
Power Capacity
450 watts is perfect for efficient, mid-range builds but limits upgrades.
Key Specs
EPS Connector
1
SATA Connector
6
Fan Bearing Technology
Rifle Bearing
Dimensions
150mm x 86mm x 160mm
Modular
Fully
PSU Compatibility
ATX12V v2.4 and EPS12V 2.92 standards
Cable Type
Low-Profile, All Black
Floppy Connector
1
Features
- Fully modular design for easy installation and clean builds
- Optimized for quiet operation with a 140mm fan and zero RPM mode
- 80 PLUS Gold certified for high efficiency
- Low-profile, all-black modular cables for a sleek aesthetic
- Reliable power delivery with a 5-year warranty
What customers say
Customers consistently praise the Corsair RM450 for its exceptional reliability and remarkably quiet operation. Many users highlight its robust build quality, noting the unit's consistent performance over extended periods. The fan often remains silent under typical loads, contributing significantly to a peaceful computing environment. While some find the modular cabling a bit stiff, the overall consensus points to a premium power supply that delivers dependable power with minimal noise, making it a solid choice for those prioritizing stability and quietness in their systems. Its long term performance is a frequent positive mention.
Know before you buy
A fully modular design means every cable can be detached from the power supply. You only need to plug in the cables your specific components require, which significantly reduces clutter and improves airflow inside your case.
The Zero RPM mode allows the 140mm fan to remain completely still during low to medium loads, ensuring silent operation. The fan will only begin to spin once the power supply reaches a higher temperature threshold, keeping your system quiet during light tasks.
450 Watts is sufficient for a standard mid-range build, such as a system with a single graphics card and a modern processor. However, you should check the power requirements of your specific GPU and CPU to ensure they do not exceed this limit under full load.
The RM450 uses low-profile, flat black cables that are much easier to route through tight spaces than traditional sleeved cables. While the PSU itself follows the standard ATX form factor, the flat design makes cable management significantly easier in smaller builds.
The 80 PLUS Gold certification indicates that the power supply is highly efficient, converting at least 87% to 90% of AC power into DC power for your components. This results in less wasted energy as heat, lower electricity costs, and more reliable power delivery.
Yes, it includes one ATX connector, one EPS connector for the CPU, and two PCIe connectors for your graphics card. It also provides six SATA connectors, making it well-equipped for most standard storage and component configurations.
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$110