Corsair RM1000x ATX v3.1 PSU Review

Corsair finally released the update version of its highly popular RMx line, which updates the models to meet the ATX v3.1 specification requirements. In today’s review I will look at the strongest member of the line, with 1000W max power. 

The Corsair RM1000x ATX v3.1 will be included in my best ATX v3.x & PCIe 5.x PSU picks article.

The Corsair RMx line received an update to meet the ATX v3.1 requirements, which require, among others, a PSU to withstand 200% of its max power for short periods. Another unique feature of this new models is the fan speed control knob, through which you can adjust the fan’s speed at light loads, from zero RPM up to full speed. For instance, when you select a 500-600 RPM fan speed at light loads, this will be the starting point and increase once the PSU’s thermal load increases. So, instead of providing a switch to select or deselect the fan’s semi-passive mode, Corsair provided the option to choose the fan’s starting speed.

In today’s review, I will evaluate the strongest member of the RMx ATX v3.1 line, which has a maximum power of 1000W. The other two line members have a maximum power of 850W and 750W.

1000W ATX v3.1 PSU Reviews:

Technical Specifications:
  • Manufacturer (OEM): Channel Well Technology (CWT)
  • Max Power: 1000W
  • Cybenetics Efficiency: [115V] Cybenetics Platinum (89-91%), [230V] Cybenetics Platinum (91-93%)
  • Noise: Cybenetics A (20-25 dB[A])
  • Compliance: ATX v3.1, EPS 2.92
  • Operating Temperature (Continuous Full Load): 0 – 50 °C
  • Alternative Low Power Mode support: Yes
  • Power 12V combined: 1000W
  • Number of 12V rails: 1
  • Power 5V + 3.3v: 150W
  • Power 5VSB: 15W
  • Cooling: 140mm Fluid Dynamic Bearing Fan (NR140HP)
  • Semi-Passive Operation: ✓ (Adjustable Fan Speed)
  • Modular Design: Yes (Fully)
  • High Power Connectors: 2x EPS (2x cables), 4x PCIe 6+2 pin (4x cables), 1x PCIe 12+2 pin (600W)
  • Peripheral Connectors: 12x SATA (3x cables), 6x 4-pin Molex (2x cables)
  • ATX Cable Length: 610mm
  • EPS Cable Length: 750mm
  • 12+2 pin PCIe Cable Length: 600mm
  • 6+2 pin PCIe Cable Length: 650mm
  • Distance between SATA / 4-pin Molex: 115/100mm
  • In-cable capacitors: No
  • Dimensions (W x H x D): 150 mm x 85 mm x 160mm
  • Weight: 1.91 kg (4.21 lb)
  • Warranty: 10-years
  • MSRP (excluding VAT): $190

Power Specifications

Rail 3.3V 5V 12V 5VSB
Max. Power Amps 20 20 83.3 3
Watts 150 1000 15
Total Max. Power (W) 1000
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One thought on “Corsair RM1000x ATX v3.1 PSU Review

  1. I bought one of these. It made a small amount of coil whine when I tested it in my old PC, but only when idling in windows (starting any app up made the noise go away completely). However on my main PC it makes no noise whatsoever, phew! I like the fan control, I have it turned to it’s lowest setting where it is still inaudible but at least this removes the heat rather than letting it radiate in to my PC case.

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