About Corsair RM850x Shift White Desktop PSU
| Category | Details |
|---|---|
| Output Power & Rails | Total power: 850 W. +12 V rail: 70.8 A (≈ 849.6 W), +3.3 V & +5 V rails: 20 A each with combined 150 W, +5Vsb: 3 A / 15 W. |
| Input / Compatibility | Input voltage: 100–240 V AC; Input current: 5–10 A; Frequency: 47–63 Hz. Compatible with ATX 3.1 / ATX12V 3.1 systems. |
| Efficiency & Certification | 80 PLUS Gold certification, Cybenetics-certified for efficiency, lower heat and noise. |
| Cooling & Noise | 140 mm fan with fluid dynamic bearing; Zero-RPM mode under low/medium load for near-silent operation. |
| Build Quality & Components | Uses 100% industrial-grade Japanese electrolytic capacitors rated at 105 °C — enhances reliability and longevity. |
| Form Factor & Compatibility | ATX PSU form factor. Fits in PC cases that support standard ATX PSU layout. Requires case width of at least 210 mm for proper cable routing due to side-panel modular interface. |
| Connectors & Modular Cables | Uses CORSAIR Type 5 Gen-1 Micro-Fit modular cables. Includes standard 24-pin ATX, EPS (4+4) CPU cables, PCIe 6+2 / 12V-2×6 GPU cables (for modern GPUs), SATA power connectors, Molex (PATA) connectors. Exact connector count may vary depending on version. |
| Protections & Safety | Includes protections such as Over Voltage Protection (OVP), Over Current (OCP), Over Power (OPP), Over Temperature (OTP), Short Circuit Protection (SCP), ensuring safe operation under load. |
| MTBF & Warranty | Mean Time Between Failures (MTBF): ~100,000 hours. Backed by a 10-year manufacturer warranty. |
| Physical Dimensions & Colour | Standard ATX PSU dimensions (approx. 160 × 150 × 86 mm). Colour: White (for the “Shift White” edition). |
One of the standout attributes of the Corsair RM850x Shift White Desktop PSU is its 80 PLUS Gold efficiency certification, meaning it delivers power with up to ~90 % efficiency under typical loads.
This helps reduce wasted energy, lower heat generation, and improve overall energy efficiency — all beneficial for both performance and long-term electricity costs.
The Corsair RM Series Desktop PSU is also certified under the latest ATX 3.1 standard, making it future-ready and compatible with modern motherboards and GPUs — including those requiring PCIe 5.0 / 12V-2×6 (12VHPWR) connectors, common with high-end graphics cards.
The fully modular cable design (using CORSAIR’s Type 5 Micro-Fit connectors) gives you the flexibility to connect only the cables you actually need.
This not only simplifies cable management but also improves airflow inside the case.
The “side-panel modular interface” is a distinct design choice of the Shift series: instead of cables emerging from the rear, they connect sideways — helping build cleaner-looking rigs and making cable routing easier, especially in cases with side-access cable covers.
Cooling and noise control are thoughtfully engineered.
A 140 mm fluid-dynamic-bearing fan ensures efficient airflow while maintaining longevity and low vibration.
More importantly, the Corsair 80 Plus Gold Fully modular PSU supports Zero-RPM mode — if the system load is low or idle, the fan stops completely, resulting in near-silent operation.
This is a big plus for quiet builds, home offices, or media PCs where minimal noise is preferred.
Reliability is another strong suit.
Internally, it uses 105 °C-rated Japanese capacitors, standard for high-end power supplies, which helps ensure stable voltage regulation, durability, and longevity even under continuous heavy loads or higher ambient temperatures.
On top of that, the Corsair White Shift Series Power Supply Unit includes multiple safety protections: over-voltage, over-current, over-power, short circuit, and over-temperature protections safeguard connected components against electrical faults.
Connector-wise, Corsair RM850x Shift White Desktop PSU offers wide compatibility: 24-pin ATX for motherboard power, two EPS (CPU) 8-pin (4+4) cables, multiple PCIe connectors (6+2 pin and a 12VHPWR 12-2×6 pin cable for latest GPUs), plenty of SATA power cables for drives, and Molex connectors for older peripherals or accessories — making it suitable for both modern and legacy components.
Physically, the Corsair 850 Watt Desktop PSU follows the standard ATX form factor, making it compatible with the vast majority of PC cases — though because of the side-facing modular interface, it’s recommended to use a case that offers at least 210 mm width clearance for cables.
Overall, the Corsair RM850x Shift White Desktop PSU combines robust power delivery, modern standard compliance (ATX 3.1, PCIe 5.0 ready), efficient and quiet operation, flexible modular cabling, and premium build quality.
These qualities make it a strong choice for gaming rigs, content-creation workstations, or any PC build where stable power, future-proofing and clean cable management matter.
