Overview
The Corsair RM850x (2024) is an 850W fully modular power supply with 80 PLUS Gold certification. It features a 135mm fluid dynamic bearing fan for quiet operation and delivers stable power even under heavy load. As the latest model in the popular RMx series, it is a versatile choice for mid-range to high-end PC builds.
Key Features
- 80 PLUS Gold certified: up to 90% efficiency, reducing heat and electricity costs.
- Fully modular cables: connect only the cables you need for a clean build.
- 135mm fluid dynamic bearing fan: low noise and long lifespan, with zero RPM mode for silent operation at low loads.
- Japanese capacitors: high reliability for long-term use.
- 10-year warranty: peace of mind for years to come.
Compatibility Guide
- Form factor: standard ATX, fits most ATX cases.
- Connectors: ATX 24-pin, dual EPS12V 8-pin, four PCIe 6+2-pin, twelve SATA, six peripheral. Compatible with modern GPUs and motherboards.
- Note: Check your case's PSU compartment depth. The RM850x has a depth of 160mm. It may not fit in compact cases.
Ideal Builds
- Mid-range to high-end gaming PCs: pairs well with GPUs like RTX 4070 Ti Super or RX 7800 XT for stable performance.
- Silent PC enthusiasts: zero RPM mode and quiet fan make it nearly silent at idle.
- Long-term builds: 10-year warranty and high-quality capacitors ensure reliability over many years.
Upgrade Considerations
- Over-spec: 850W is sufficient for most single-GPU setups, even RTX 4090. But having headroom for future upgrades is a plus.
- Bottleneck: The PSU itself rarely becomes a bottleneck, but insufficient wattage can cause instability. The RM850x provides ample power.
- Cable management: Use only necessary cables to maintain good airflow inside the case.