RMx Series RM1000x Fully Modular Power Supply (UK)
Power your next build with a CORSAIR RMx Series fully modular PSU for quiet, Cybenetics Gold-certified efficient performance.
Includes
Fully modular, Type-4 connectors
Cybenetics Gold-certified
ATX 3.1 compliant, supporting PCIe 5.1
Zero RPM Fan Mode for near-silent operation at lower loads
QUIET, DEPENDABLE, EFFICIENT
Our best-selling PSU, updated. This fully modular, low noise, Cybenetics Gold-certified power supply is ATX 3.1 compliant and ideal for delivering dependable power to today's top-performing PCs.
FULLY MODULAR CONNECTORS
Connect only what you need using sleek embossed cables with low-profile combs to make installations a breeze.
Native 12V-2x6 GPU cable included for use with modern graphics cards such as the NVIDIA® GeForce RTX™ 40 Series.
140mm LOW-NOISE FAN
A fluid dynamic bearing fan with magnetic dome structure keeps noise to a minimum, with Zero RPM mode to eliminate fan noise completely at low to medium loads.
MANUAL FAN OVERRIDE KNOB
Want to get more air through the PSU or to exhaust some heat from your case? You can override the Zero RPM Mode and low-noise profile of the RMx Series with our manual fan override knob, increasing fan speed and airflow.


Overview
Key Features
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1,000W Power Capacity (ATX 3.1 Certified) Powers flagship GPUs such as the RTX 4090 and RTX 5090, with headroom for overclocking and system expansion. ATX 3.1 certification ensures compatibility with modern components and power states, including support for handling GPU power spikes up to 200% for milliseconds - critical for preventing shutdowns during gaming.
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Cybenetics Gold Efficiency & A-Rated Noise Gold efficiency means less energy is wasted as heat, resulting in lower electricity bills over the PSU’s lifetime and quieter operation since the fan doesn’t need to work as hard. The Cybenetics A noise rating confirms acoustics under 30 dBA across typical loads—quieter than a whisper, letting you focus on the game, not the hardware.
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Zero RPM Fan Mode (140mm FDB Fan with Manual Override) The fan completely stops spinning during web browsing, light gaming, and productivity work, eliminating fan noise when you don’t need full cooling. When airflow is needed, the 140mm fan moves more air at lower RPM than smaller fans, staying quiet even under load. The manual override knob lets you force the fan to maximum speed to exhaust heat from the case during extended gaming sessions or stress testing.
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Fully Modular Type 4 Cables (100% Japanese Capacitors) Connect only the cables you need—no excess clutter choking airflow or complicating builds. Type 4 cables work across CORSAIR’s modular PSU lineup, so custom-sleeved cables carry forward to future upgrades. Premium Japanese capacitors rated for 105°C (vs. 85°C in budget PSUs) ensure stable voltage delivery and a longer lifespan, which is especially critical in systems running 24/7 or in warm environments. Backed by a 10-year warranty and 100,000-hour MTBF.
Use Cases
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High-power GPU build (RTX 4090/5090, 1000W+, 12VHPWR native): 1,000W continuous at 50°C with ATX 3.1 certification and a native 12V-2x6 cable rated for 600W - no adapters required. Handles 200% GPU power spikes without shutdown. 300W overhead beyond RTX 4090 and flagship CPU loads. 105°C Japanese capacitors ensure stable voltage during extended overclocking sessions.
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Quiet system builder (zero-RPM mode, Platinum/Titanium efficiency): Zero RPM mode completely stops the 140mm fan at loads below 40% - silent during productivity and light gaming. When needed, the fluid-dynamic bearing design stays under 30 dBA at gaming loads (Cybenetics A rating). Platinum efficiency reduces heat, helping to keep fan speeds lower. The manual override knob forces airflow during stress testing and then returns to silence.
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Future-proof upgrader (ATX 3.0, headroom for next-gen GPUs): ATX 3.1 with native 12V-2x6 supports RTX 40/50 Series and future GPUs. 1,000W power supply handles 450-575W graphics cards and high-power CPUs without strain. Type 4 cables are compatible with future CORSAIR PSUs. 10-year warranty and 100,000-hour MTBF outlast multiple GPU generations—upgrade graphics three times, buy PSU once.
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Reliable workstation user (long warranty, full protections, 24/7 operation): Rated for continuous 50°C operation with 100% Japanese 105°C capacitors, the RM1000x handles 24/7 workloads in warm environments. Full protection suite prevents faults from damaging Threadripper CPUs or professional GPUs. 100,000-hour MTBF means 11+ years of continuous operation, backed by a 10-year warranty.
For Compatibly of the product, please visit the respective product web site.
Compatibility issues are not covered under warranty or return.
To be eligible for a return in case of a change of mind or product damage, customers are required to video record the unboxing of the package.

