CORSAIR RM750x Fully Modular ATX Power Supply - 80 Plus Gold - Low-Noise Fan - Zero RPM - Black
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AI Verdict
This is a 750-watt, 80 Plus Gold, fully modular ATX power supply with a 135mm magnetic levitation fan, built for quiet, stable PC power.
This 750-watt, 80 Plus Gold, fully modular ATX power supply is a strong fit for most mid-to-high-end personal computers. Its 135mm magnetic levitation fan and 105°C Japanese capacitors provide a quiet and reliable power source for demanding components, including modern graphics cards and motherboards via its EPS12V connector.
If you're planning a build with a very high-end GPU like an RTX 4090 or need native ATX 3.1/PCIe 5.1 support, look for a PSU explicitly stating those standards and a higher wattage, like an 850W or 1000W unit.
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Pros
- Features a 135mm ML fan with magnetic levitation bearing for low noise operation.
- Uses 100% industrial-grade, 105°C rated Japanese capacitors for unwavering power and reliability.
- Fully modular design means you only connect necessary cables, improving build cleanliness and airflow.
- Supports Modern Standby sleep mode for extremely fast wake-from-sleep times.
- Backed by a ten-year warranty, indicating long-term reliability.
- Achieves 80 PLUS Gold efficiency, with Cybenetics Gold (87-89%) ratings.
Cons
- The 8-pin CPU cables are stiff and can be difficult to route, especially in cases where length is just barely enough.
- The flat design of some cables can look 'jank' when twisted to connect to components.
- While advertised with Zero RPM mode, the fan may start spinning at loads as low as 300 watts, not 400 watts as implied by some product pages.
- Does not explicitly support newer ATX 3.1 or PCIe 5.1 standards, which are present in some later RM750x variants.
Dimension Scores
The unit is 80 Plus Gold certified and Cybenetics Gold (87-89%) for efficiency, delivering 750 watts of power reliably.
The 135mm magnetic levitation fan operates in Zero RPM mode up to 300-400 watts and remains quiet even under load.
It uses 100% industrial-grade, 105°C rated Japanese capacitors, ensuring high reliability and a long lifespan.
The fully modular design simplifies cable management by allowing users to connect only necessary cables, though some cables are stiff.
Best For
- Gaming PCs requiring 750 watts of stable power for a single high-end GPU (e.g., RTX 4070 Super, RX 7800 XT) and a mainstream CPU.
- Quiet PC builds where minimal fan noise at low to medium loads is a priority.
- Systems where clean cable management is desired due to the fully modular design.
- Users prioritizing long-term component reliability, given the 105°C Japanese capacitors and 10-year warranty.
Not Recommended For
- Cutting-edge builds requiring ATX 3.1 or native PCIe 5.1 12VHPWR connectors for the latest GPUs.
- Budget-constrained builds, as more affordable 80 Plus Gold PSUs exist without the premium components.
- Small form factor (SFF) cases that require SFX or SFX-L power supplies, as this is an ATX form factor PSU.
Watch Out For
- The 'Zero RPM' fan mode might not be truly zero RPM until a higher load than expected; some users report the fan activating around 300 watts, not the implied 400 watts.
- Cable stiffness, particularly with the 8-pin CPU cables, can make routing challenging and lead to a less tidy appearance in tight spaces.
- The flat cable design, while aesthetically pleasing for some runs, can look awkward and 'jank' when twisted to fit specific connectors.
Full Specifications
| ASIN | B08R5W27JS |
| Brand | Corsair |
| Color | Black |
| Series | RM750x, |
| Voltage | 120 Volts |
| Wattage | 750 watts |
| Model Name | RM750x, |
| Form Factor | ATX |
| Item Weight | 3.74 pounds |
| Manufacturer | Corsair |
| Power Source | Corded Electric |
| Connector Type | EPS |
| Cooling Method | Air |
| Output Wattage | 750 |
| Item model number | CP-9020199-NA |
| Compatible Devices | Personal Computer |
| Product Dimensions | 6.3 x 5.91 x 3.39 inches |
| Item Dimensions LxWxH | 6.3 x 5.91 x 3.39 inches |
| Item dimensions L x W x H | 6.3 x 5.91 x 3.39 inches |
What Buyers Say
Users frequently point out the stiffness of the 8-pin CPU cables, which can make routing a real headache, especially in smaller cases where every millimeter counts. Despite the advertised 'Zero RPM' fan mode, some buyers have noticed the fan kicking in at loads as low as 300 watts, which is earlier than the implied 400-watt threshold. However, the overall quiet operation and the use of high-quality Japanese capacitors are consistently praised, contributing to its reputation for reliability. The fully modular design is a definite plus for keeping builds tidy, even if some of the cables fight you a bit.
“Man, this PSU is quiet, like, really quiet, but those CPU cables almost broke my fingers trying to get them plugged in, seriously, they're like rebar. Still, my PC hasn't crashed once, so I guess it's worth the cable struggle.”
Common Praise
- The 135mm magnetic levitation fan keeps noise levels low, often being inaudible over other system components.
- The fully modular design makes for a cleaner build with only the necessary cables connected.
- The use of 105°C rated Japanese capacitors instills confidence in long-term stability and performance.
- The 10-year warranty provides significant peace of mind regarding product longevity.
- Delivers stable and efficient 80 Plus Gold power, even under demanding loads.
Common Complaints
- The 8-pin CPU cables are stiff and difficult to bend and route, especially in tight spaces.
- Some users report the fan activating at lower loads (around 300 watts) than the advertised or expected 'Zero RPM' threshold.
- The flat design of some cables can look messy or 'jank' when they need to be twisted for connection.
Ownership Tips
- The fan is genuinely quiet, often not spinning at all during light web browsing or productivity tasks.
- Cable management takes a bit more effort than expected due to the stiffness of certain cables, requiring more patience to achieve a clean look.
- The unit feels substantial and well-built, with a noticeable weight that suggests quality components inside.
- Modern Standby works as advertised, waking the PC quickly from sleep.
- Even under gaming loads, the PSU fan noise is typically drowned out by GPU or case fans.
Frequently Asked Questions
Does this PSU support the latest graphics cards with 12VHPWR connectors?
The CORSAIR RM750x (2021 model, ASIN B08R5W27JS) includes EPS12V connectors for modern graphics cards and motherboards, but it does not natively feature the newer 12VHPWR (PCIe 5.0/5.1) connector. You would need an adapter for GPUs that require it.
How quiet is the fan on this power supply?
The 135mm magnetic levitation fan is designed for low noise and operates in a 'Zero RPM' mode where it doesn't spin under low loads. User reports and professional reviews indicate the fan typically starts spinning around 300-400 watts of load, remaining quiet even when active.
Are the cables included with this power supply flexible?
The power supply is fully modular, meaning you only use the cables you need. However, some users have noted that the 8-pin CPU cables can be stiff and challenging to route, and the flat design of some cables can look untidy when twisted.
What is the warranty period for the RM750x?
The CORSAIR RM750x comes with a ten-year warranty, which covers defects in material and workmanship, reflecting Corsair's confidence in its durability and component quality.
Is this power supply suitable for a high-power gaming PC?
With 750 watts of 80 Plus Gold efficient power, this PSU is suitable for most gaming PCs, including those with a high-end GPU like an RTX 4070 Super or RX 7800 XT, paired with a mainstream CPU.
Buying Guide
When you're looking at a power supply, you're essentially picking the heart of your PC. You need enough wattage to power all your components, especially your graphics card and CPU. Efficiency ratings like 80 Plus Gold tell you how much power the PSU wastes as heat; higher efficiency means less wasted energy and potentially less heat in your case. Modularity is about how many cables you have to plug in; fully modular means you only use what you need, which is a huge win for keeping your build tidy and improving airflow.
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. For a PC, 750 watts is enough for most gaming setups with a single high-end graphics card and a powerful CPU, but a top-tier GPU might need more.
80 Plus Gold
This is an efficiency rating. It means the PSU converts at least 87% of the power from your wall into usable PC power at 100% load, and even more at lower loads. Less waste means less heat and potentially lower electricity bills, like a fuel-efficient engine.
Fully Modular
This refers to the cables. A fully modular PSU lets you detach every single cable you don't need. Imagine building with LEGOs and only using the pieces you want, instead of having a bunch of unused wires cluttering up your PC case and blocking airflow.
135mm ML fan
The fan cools the power supply. A larger fan (135mm here) can move more air at lower RPMs, meaning it's quieter. 'ML' (Magnetic Levitation) refers to the bearing type, which is known for its durability and quiet operation, like a high-end, silent ceiling fan.
Alternatives
If you need native ATX 3.1 and PCIe 5.1 connectors for the newest GPUs, search for power supplies explicitly stating those standards. For smaller cases, look for SFX or SFX-L form factor PSUs.
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