psu
Corsair RM850x SHIFT - ATX 3.0 / PCIe 5.0 Compatible 850W Fully Modular Power Supply
5/2/2026, 3:23:20 AM
Tags: #power-supply #atx3.0 #80-plus-gold #fully-modular
Fully ATX 3.0 / PCIe 5.0 ready for next-gen GPUs. Features revolutionary cable management with side-mounted modular connectors in an 850W Gold-rated PSU.
Who this is for
Users building high-end gaming PCs or creator workstations with latest GeForce RTX 40 series or Radeon RX 7000 series GPUs. Those who prioritize easy cable management and future upgradeability.
Details
The Corsair RM850x SHIFT is an 850W fully modular power supply optimized for next-generation PC builds, fully compliant with the ATX 3.0 standard. Its side-mounted modular connectors significantly improve cable management while delivering both power stability and efficiency under high loads. Key Features & Performance ・ATX 3.0 & PCIe 5.0 Ready: Designed to withstand instantaneous high power excursions (power spikes) from latest GPUs and CPUs. ・80 PLUS Gold Certified: Achieves up to 90% efficiency, reducing heat output and power loss. ・Fully Modular Design: Allows connection of only necessary cables, improving internal airflow and cable management. ・Side-Mounted Modular Connectors: Located on the side rather than the rear, making connections easier even in tight cases. ・135mm Fluid Dynamic Bearing Fan: Features a Zero RPM mode for silent operation at low loads, remaining quiet under high loads. ・10-Year Warranty: Backed by a manufacturer's warranty ensuring long-term reliability. Compatibility & Build Guidance ・Form Factor Support: Standard ATX size. ・Recommended System Configuration: Ideal for gaming/creator PCs pairing GPUs like GeForce RTX 4070 Ti/4080 or Radeon RX 7900 XT with CPUs like Ryzen 7/9 or Core i7/i9. ・Cable Connectivity: Includes one dedicated 12VHPWR connector for direct power to latest GPUs, plus multiple traditional PCIe 8-pin connectors. ・Capacity Selection Guide: 850W is a standard capacity for high-end configurations. Consider 1000W+ models if overclocking top-tier GPUs like RTX 4090 or connecting numerous storage/cooling devices. ・Bottleneck Risk: Insufficient PSU capacity can cause system instability or sudden shutdowns. It is recommended to choose a PSU with 1.2 to 1.5 times your system's peak power draw.
Performance specs
- Rated Power850W
- Certification80 PLUS Gold
- Form FactorATX
- Modular DesignFull
- Connector PlacementSide
- 12VHPWR Connectors1
- Warranty10 years
Product details
- Category
- psu
- Tags
- #power-supply #atx3.0 #80-plus-gold #fully-modular
- Published
- 1/1/2023, 9:00:00 AM
- Collected
- 5/2/2026, 3:23:20 AM
- Primary source
- Corsair Official
Compatibility
- CPU sockets
- All
- Memory types
- All
- Form factors
- ATX, Micro-ATX, Mini-ITX
- PCIe versions
- 5.0, 4.0, 3.0
- Storage interfaces
- SATA, M.2
- Power connectors
- 24-pin ATX, 8-pin EPS, PCIe 8-pin, 12VHPWR
- Recommended PSU
- 650W
- Max GPU length
- 340mm
- Cooler clearance
- 160mm
- Notes
- Standard compatibility with ATX cases. Due to side-mounted connectors, potential interference in extremely narrow or non-standard layout cases. Included 12VHPWR cable allows direct connection to PCIe 5.0 GPUs.
Sources
Corsair Official: https://www.corsair.com/us/en/p/psu/cp-9020254-na/rm850x-shift-fully-modular-low-noise-atx-power-supply-cp-9020254-na
- Corsair Official - Official product page (specs & features)
- Tom's Hardware - Detailed review from major media
- Amazon.co.jp - Major retail price reference