CORSAIR RM750x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2x6 Connector – Black
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AI Verdict
This 750-watt, Cybenetics Gold, ATX 3.1 power supply with a native 12V-2x6 connector is for PC builders needing modern GPU compatibility and fully modular cabling.
This 750-watt power supply is a strong fit for most modern gaming and enthusiast PCs, especially with its ATX 3.1 compliance and native 12V-2x6 connector for current-gen GPUs. The Cybenetics Gold efficiency and fully modular design align well with users seeking performance and clean aesthetics.
If you're planning on a very high-end GPU or a system with multiple power-hungry components, consider upgrading to an 850W or 1000W ATX 3.1 PSU for more headroom and additional PCIe cables.
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Pros
- Compliant with ATX 3.1 power standard and supports PCIe 5.1, resisting transient power spikes.
- Includes a native 12V-2x6 connector for direct GPU to PSU connection, eliminating adapter needs.
- Rated for up to 91% efficiency, reducing power consumption and heat output.
- Operates silently at low and mid loads, with the fan activating only above 300 watts.
- Features fully modular cabling, allowing you to connect only necessary cables for a cleaner build.
- Built with 100% Japanese 105°C-rated electrolytic capacitors for stable electrical performance.
Cons
- Fan noise can become noticeable under heavy system loads, despite the zero RPM mode.
- Cables are stiff, making routing and achieving a clean aesthetic inside smaller cases challenging.
- Its physical size is larger than some comparable power supplies, potentially causing fit issues in compact PC cases.
- The 750W model lacks a third PCIe cable, meaning AMD cards requiring three PCIe connections might need an 850W or higher PSU.
- Efficiency can decrease in hotter operating environments.
Dimension Scores
The PSU is Cybenetics Gold-Certified, achieving up to 91% efficiency, and can deliver its full 750 watts at 47 degrees Celsius.
It features a zero RPM fan mode, keeping it silent below 300 watts, but the 140mm FDB fan can become noticeable under heavy loads.
Constructed with 100% Japanese 105°C-rated electrolytic capacitors and a 140mm fluid dynamic bearing fan, indicating high-quality internal components.
It's fully modular with embossed, low-profile cables, which aids in management, but some users report the cables are stiff and hard to route.
Best For
- Gaming PCs with modern NVIDIA GPUs requiring a 12V-2x6 connector.
- Custom PC builds where cable management and aesthetics are important due to fully modular design.
- Systems needing stable, efficient power delivery for demanding components.
- Users prioritizing a quiet PC experience during light to moderate tasks.
Not Recommended For
- Compact ITX builds where PSU dimensions are extremely restricted.
- Budget-focused builds where a lower-priced, less efficient PSU is acceptable.
- High-end AMD GPU setups that specifically require three separate PCIe power cables from the PSU.
Watch Out For
- The CPU 8-pin cables might be barely long enough for routing in some larger cases, requiring careful planning.
- Some users report the fan becoming audible under heavy load, which could be a concern for completely silent builds.
- If you're running an AMD card that needs three PCIe cables, you'll need to step up to an 850W model or higher, as this 750W unit doesn't include the third cable.
- The cables are stiff, which can make them difficult to bend and route neatly, especially in tight spaces.
Full Specifications
| ASIN | B0DJ1M18CY |
| Brand | Corsair |
| Color | Black |
| Series | RMx |
| Wattage | 750 watts |
| Model Name | RMx |
| Form Factor | ATX |
| Item Weight | 3.88 pounds |
| Manufacturer | Corsair |
| Connector Type | ATX |
| Cooling Method | Air |
| Output Wattage | 750 Watts |
| Item model number | CP-9020285-NA |
| Compatible Devices | Monitor |
| Product Dimensions | 2.3 x 3.39 x 5.91 inches |
| Item Dimensions LxWxH | 2.3 x 3.39 x 5.91 inches |
| Item dimensions L x W x H | 2.3 x 3.39 x 5.91 inches |
What Buyers Say
The most surprising thing is how many people are specifically calling out the ATX 3.1 and 12V-2x6 connector as a key selling point for new GPU builds. Users frequently mention the quiet operation at lower loads, which is a big win for everyday use. However, the stiffness of the cables and the potential for fan noise under heavy system stress are recurring points of frustration. The unit's physical size also comes up as a consideration for smaller cases.
“Needed a new PSU for my 4070 Ti Super, this thing just plugged right in, no stupid adapters, and it's dead silent until I'm really pushing it, which is awesome. Cables are a pain to bend though, felt like I was gonna break something.”
Common Praise
- Native 12V-2x6 connector means no adapters needed for new graphics cards.
- Fan doesn't spin up until around 300 watts, making it very quiet for most tasks.
- Fully modular design makes connecting only necessary cables straightforward.
- The 10-year warranty provides long-term peace of mind.
- Handles transient power spikes well due to ATX 3.1 compliance.
Common Complaints
- Cables are stiff and difficult to bend for clean routing, especially in tight spaces.
- Fan noise becomes noticeable when the system is under heavy load.
- The PSU is physically larger than some alternatives, which can be an issue for compact cases.
- The 750W model doesn't include a third PCIe cable, limiting options for some AMD GPUs.
- CPU 8-pin cables can be a tight fit or too short in certain case layouts.
Ownership Tips
- The zero RPM fan mode actually works as advertised, keeping the PC nearly silent during web browsing and light gaming.
- Routing the stiff 24-pin ATX cable was a wrestling match, even with the modularity.
- The native 12V-2x6 cable is a game-changer for new GPU installations, no more messy dongles.
- Even with the fan spinning under load, it's not an annoying whine, more of a consistent hum.
- The unit feels substantial and well-built, giving confidence in its longevity.
Frequently Asked Questions
Does this PSU come with the new 12V-2x6 cable for modern graphics cards?
Yes, it includes a native 12V-2x6 connector, so you won't need any adapters for the latest graphics cards.
Is this power supply quiet during normal use?
It operates silently at low and mid loads because its fan doesn't spin until the power draw hits around 300 watts. Under heavy load, the fan might become audible.
Are the cables easy to manage?
The cables are fully modular, which helps with management, but some users have found them to be stiff, making routing a bit challenging.
Is this PSU compatible with ATX 3.0 or ATX 3.1?
This is the newer ATX 3.1 compliant model, which also supports PCIe 5.1.
What kind of warranty does this power supply have?
Corsair backs this power supply with a 10-year warranty.
Buying Guide
When you're looking at a power supply, you're basically picking the heart of your PC. You need enough wattage to power all your components, especially your graphics card and CPU, without constantly running at max capacity. Efficiency ratings like Cybenetics Gold tell you how much power is actually delivered to your components versus wasted as heat, which impacts your electricity bill and how hot your case gets. Also, for newer graphics cards, make sure it has the right connectors like the 12V-2x6, or you'll be stuck with adapters.
wattage (750 watts)
This is the total power your PSU can deliver. Think of it like the horsepower of a car; you need enough to get where you're going, but too much is overkill. For a gaming PC, 750 watts is usually enough for a single high-end GPU and CPU without stressing the unit. If you're running multiple GPUs or extreme overclocking, you'd need more.
Cybenetics Gold Efficiency
This rating (like 80 Plus Gold) tells you how efficiently the PSU converts AC power from your wall into DC power for your PC. Gold means it's at least 91% efficient at typical loads, so less power is wasted as heat, saving you a bit on your electricity bill and keeping your system cooler. It's like getting more miles per gallon from your car.
ATX 3.1 Compliant & Native 12V-2x6 Connector
This is crucial for modern PCs. ATX 3.1 means the PSU can handle sudden power spikes from high-performance components like the latest graphics cards. The native 12V-2x6 connector is a direct, single cable that powers these new GPUs, replacing the need for multiple 8-pin cables and clunky adapters, making your build cleaner and more reliable.
Fully Modular
This means you only plug in the cables you actually need for your components. It's like having custom-length cables for your car's engine; it reduces clutter inside your PC case, improves airflow, and makes building or upgrading much easier. Non-modular PSUs have all cables permanently attached, even if you don't use them.
Alternatives
If this 750W unit isn't enough, look for PSUs with higher wattage (850W, 1000W+) that are also ATX 3.1 compliant and include multiple 12V-2x6 connectors or more PCIe cables for multi-GPU or power-hungry setups. For tighter budgets, consider a Cybenetics Bronze or Silver rated unit if you can compromise on a few percentage points of efficiency.
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