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Corsair RMX Series, RM750x, 750 Watt, 80+ Gold Certified, Fully Modular Power Supply (Low Noise, Zero RPM Fan Mode, 105°C Capacitors, Fully Modular Cables, Compact Size) Black
Corsair

Corsair RMX Series

Bottom line: The Corsair RMX Series ($129.10 on Amazon as of 2026-10-21 12:15 UTC): 80 PLUS Gold certified: less waste heat, lower draw; main trade-off: 750W ceiling is tight for a 4090/5090 plus high-core CPU.

$129.10

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Buy on Amazon — $129.10 Compare to similar power supplies

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 80 PLUS Gold certified: less waste heat, lower draw
  • ✓ Zero RPM fan mode means silent operation at low/medium load
  • ✓ Ten year Corsair warranty on the RM750x
  • ✓ 100% Japanese 105C-rated industrial capacitors

Cons

  • ✗ 750W ceiling is tight for a 4090/5090 plus high-core CPU
  • ✗ Fully modular means loose cables to store and lose
  • ✗ Compact chassis makes cable bends stiffer in small cases
  • ✗ No 12VHPWR/12V-2x6 native cable listed in the spec sheet

Manufacturer description

Gold certification means less energy wasted as heat, so your case runs cooler and your fan curves stay calm. The standout feature is Zero RPM fan mode: at low and medium loads the fan simply stops spinning, making the RM750x effectively silent during desktop work, browsing, and light gaming. Push it to full load and the low-noise fan still keeps things quiet. Inside, 100 percent industrial-grade Japanese capacitors rated to 105 degrees C handle the thermal stress of a sealed PSU shroud, and Corsair rates the unit at 100,000 MTBF hours. The fully modular cable design lets you connect only…

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SpecPicks Verdict

SpecPicks scored Corsair RMX Series using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Corsair's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Is 750W enough for an RTX 4070 or 4080 build?

For a single mid-to-upper GPU paired with a mainstream CPU, 750W leaves reasonable headroom. For a top-tier flagship GPU with transient spikes, size up. Confirm your specific GPU's recommended PSU wattage on the card maker's spec page.

What warranty does the Corsair RM750x come with?

Corsair backs the RM750x with a ten year warranty. Check the product listing for current terms and regional coverage before you buy.

Does the fan run all the time?

No. Zero RPM fan mode keeps the fan completely stopped at low and medium loads, so the unit is near silent during desktop and light gaming use. At higher loads the low-noise fan spins up and Corsair tunes it to stay quiet even at full load.

Is the RM750x fully modular or semi-modular?

Fully modular. Every cable detaches, including the 24-pin, so you only install the ones your system needs. That keeps unused cables out of the case and improves airflow behind the motherboard tray.

What capacitors does the RM750x use and why does it matter?

It uses 100 percent industrial-grade Japanese capacitors rated to 105 degrees C. Higher temperature ratings matter because a PSU shroud traps heat, and Corsair rates the unit at 100,000 MTBF hours.

Key Features

  • 80 Plus Gold certified for lower power consumption, less noise and cooler temperatures
  • Tuned for low noise operation even at full load; MTBF hours 100,000 hours
  • Zero RPM fan mode for near silent operation at low to medium loads
  • 100 percent industrial grade, 105°C rated Japanese capacitors ensure unwavering power and reliability
  • Fully modular cables, so you only connect the cables your system needs

Full Specifications

BrandCorsair
Wattage750 watts
Fan Size13.5 centimeters
Model NameRMx
Form FactorATX
Model NumberCP-9020179-NA
Connector TypeEPS, SATA, PCIe
Cooling MethodAir
Item Type NameComputer Power Supply
Number of Fans1
Output Wattage750
Item Dimensions6.3 x 5.91 x 3.39 inches
Mfr Part NumberCP-9020179-NA
Compatible DevicesPersonal Computer
Connector Quantity10
Power Supply DesignFull Modular
Warranty Description10 years warranty
Maximum Input Voltage240 volts
Minimum Input Voltage100 volts
Item dimensions L x W x H6.3 x 5.91 x 3.39 inches
Full listing titleCorsair RMX Series, RM750x, 750 Watt, 80+ Gold Certified, Fully Modular Power Supply (Low Noise, Zero RPM Fan Mode, 105°C Capacitors, Fully Modular Cables, Compact Size) Black

Ready to buy?

Corsair RMX Series, RM750x, 750 Watt, 80+ Gold Certified, Fully Modular Power Supply (Low Noise, Zero RPM Fan Mode, 105°C Capacitors, Fully Modular Cables, Compact Size) Black is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $129.10

*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.

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Corsair RMX Series, RM750x, 750 Watt, 80+ Gold Certified, Fully Modular Power Supply (Low Noise, Zero RPM Fan Mode, 105°C Capacitors, Fully Modular Cables, Compact Size) Black
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