CORSAIR RMe SERIES POWER SUPPLY
Corsair RM1200e 1200W Fully Modular ATX 3.1 Power Supply
High-capacity 1200W power delivery with 80 PLUS Gold efficiency, PCIe 5.1 compatibility, native 600W-capable 12V-2x6 GPU power and quiet Zero RPM cooling for demanding PC builds.
Corsair RM1200e at a Glance
Introduction
The Corsair RM1200e 1200W Fully Modular Power Supply (CP-9020258-IN) is designed for high-performance gaming systems, enthusiast PCs and demanding workstations that need substantial power capacity for modern processors, graphics cards and multiple components.
Its 1200W continuous output provides considerable power headroom for compatible configurations. ATX 3.1 compliance and PCIe 5.1 compatibility support modern graphics-card power requirements, while the included native 12V-2x6 cable is rated for up to 600W for compatible GPUs.
The fully modular cable system lets you attach only the cables your build needs, helping reduce clutter and simplify cable management. The compact 140mm-long chassis also helps create more room for routing cables behind the power supply in compatible cases.
With 80 PLUS Gold efficiency, 105°C-rated Japanese electrolytic capacitors and a Zero RPM fan mode, the RM1200e combines high-capacity power delivery with features designed for dependable and quieter operation.
Key Features
1200W Continuous Power
Provides 1200W of rated continuous output, with the full 1200W available on the +12V rail for compatible high-performance CPU and GPU configurations.
80 PLUS Gold Efficiency
Gold certification indicates efficient power conversion, with Corsair advertising efficiency of up to 90% under specified operating conditions.
Native 12V-2x6 GPU Cable
Includes a native 12+4-pin GPU power cable rated for up to 600W for compatible modern graphics cards, reducing the need for a multi-connector adapter for this connection.
ATX 3.1 and PCIe 5.1
Designed for current PC builds with modern power-delivery requirements, including support for the latest compatible graphics-card power connection standard.
Zero RPM Fan Mode
The thermally controlled fan can stop when the PSU is under sufficiently light loads, helping deliver quieter operation when full cooling is unnecessary.
Premium Internal Components
Features resonant LLC topology, DC-to-DC conversion and 105°C-rated Japanese electrolytic capacitors for reliable operation under demanding workloads.
Power Delivery and Cooling Technology
The RM1200e uses resonant LLC topology with DC-to-DC conversion to support stable power delivery across its output rails. Its single +12V rail is rated at 100A, equivalent to the full 1200W output.
ATX 3.1 compliance and PCIe 5.1 compatibility make this power supply suitable for compatible modern GPU configurations. The included native 12V-2x6 cable is rated for up to 600W, although actual GPU compatibility depends on the card's connector requirements and total system power demand.
Zero RPM mode allows the fan to stop when cooling demand is low. When additional airflow is required, the fan resumes operation according to the PSU's thermal requirements.
Modern Standby support is designed to enable fast wake-from-sleep behaviour and improved efficiency during low-load operation on compatible systems.
Technical Specifications
Corsair's product page displays a ten-year warranty badge, while its technical specification table lists seven years; Indian retailer listings commonly state ten years. Verify the warranty applicable to the exact IN-region unit with the seller before publishing a definitive warranty term. The official specification table also lists ATX12V 3.0 while the product overview describes ATX 3.1 compliance.
Ideal Use Cases
High-Performance Gaming
Designed for compatible gaming PCs with power-hungry processors and graphics cards that benefit from a high-capacity 1200W PSU.
Content Creation Workstations
Suitable for compatible systems used for 3D rendering, video editing, simulation and other demanding professional workloads.
Multi-GPU and Expansion Builds
The high rated output and multiple PCIe power connectors can support suitable configurations, provided the total load and connector requirements are within specification.
Clean Custom PC Builds
Fully modular cabling helps builders simplify cable routing and connect only the power leads required by their hardware.
Before You Build
- Confirm the power requirements of your CPU, graphics card and other components. A 1200W PSU is intended for systems that can use its capacity; it does not make every configuration compatible automatically.
- The included native 12V-2x6 cable is rated for up to 600W. Follow the graphics-card manufacturer's connection and cable-routing instructions.
- Use only the modular cables supplied for this PSU or replacements explicitly confirmed as compatible with the exact model. Modular PSU-side pinouts are not universally interchangeable.
- Check the case clearance for the 140 × 150 × 86mm PSU and allow adequate room for cable bends and airflow.
- For multi-GPU systems or major upgrades, check available PCIe connectors, peak power demand and cable requirements rather than relying on total wattage alone.
Frequently Asked Questions
1. Is the Corsair RM1200e a 1200W power supply?
Yes. The RM1200e is rated for 1200W of continuous output, with the full 1200W available on its +12V rail.
2. Is the RM1200e fully modular?
Yes. All power cables are detachable, so you can connect only the cables required by your system and keep unused cables out of the main build area.
3. Does the RM1200e support ATX 3.1 and PCIe 5.1?
Corsair describes the RM1200e as ATX 3.1 compliant and PCIe 5.1 compatible. Its technical specification table separately lists ATX12V 3.0, so check the current regional documentation if you need the exact standards wording for a formal compatibility requirement.
4. Does it include a native 12V-2x6 GPU power cable?
Yes. It includes a native 12+4-pin 12V-2x6 cable rated for up to 600W for compatible graphics cards.
5. What does 80 PLUS Gold mean?
80 PLUS Gold is an efficiency certification indicating that the PSU meets defined power-conversion efficiency requirements under specified test conditions. Corsair advertises efficiency of up to 90% for this model.
6. What is Zero RPM fan mode?
Zero RPM mode allows the PSU fan to stop when the unit is under sufficiently light loads and cooling demand is low. The fan resumes operation when additional cooling is needed.
7. What are the dimensions of the RM1200e?
The RM1200e measures 140 × 150 × 86mm. Check PSU clearance and cable-routing space in your cabinet before installation.
8. What warranty does the Corsair RM1200e include?
Corsair's product page shows a ten-year warranty badge, while its technical specification table lists seven years. Indian retailer listings commonly state ten years. Confirm the warranty applicable to the exact CP-9020258-IN unit with the seller before purchase.
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