The Corsair RM750e is a 750W, fully modular ATX 3.0 power supply with a single fan mode. It offers efficient cooling and exceptional value at an MSRP of $99.99 USD. Its modular design offers customizable cable management, ensuring a neat and clutter-free build. With 750W of power, it is suitable for high-performance systems, delivering stable and reliable performance. The single-fan mode maintains efficient cooling while keeping noise levels low.
WHAT YOU NEED TO KNOW
THE GOOD
- Performance
It performs very well all-round.
- Resiliency
It is very resilient to a variety of input voltages.
THE BAD
- Demand Spikes
It failed to maintain ATX voltage requirements during the excursion tests. Potentially not optimal for GPUs or CPUs that have large demand spikes.
- Dynamics
The 3.3V rail exceeded ATX requirements during some of the particularly strenuous dynamic tests. It dipped below the lower limit when quickly loading to 100% of the 3.3V rail.
- Modes
It does not have the ability to change the fan and cooling modes.
THE REST
- -12V rail
Doesn’t have a -12V rail.
- Cables
It comes with standard cables that are not bad, but not premium if you prefer better cables.
- Overall
The Corsair RM750e is a reliable choice, meeting expectations for its price point. It is efficient, performs well, and comes with necessary protections. However, it may struggle with high-end hardware connections due to its limitations.
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The Corsair RM750e 750W PSU comes with a range of hardware features to enhance performance and convenience. It comes with a 120 mm fan, though common for a 'budget option' like this, it would be nice if it were a 140 mm fan, but this is difficult given the size of the power supply. There are sufficient connections on the power supply to power the CPU, 12VHPWR connector, another PCIe device, and numerous SATA devices.
In the box, it comes with standard items, though it lacks the accessories that more expensive power supplies come with. However, there are plenty of cables provided with the unit. The cable's construction is average and not particularly special.
Cables include a sleeved motherboard cable, while the rest are regular insulation, with some being flat. The 12VHPWR cable, which is a decent 600W, is a dual PCIe/CPU to 12VHPWR connection, not a 12VHPWR to 12VHPWR cable. It does not come in any lower-wattage versions. The fan is a rifle-bearing fan, which is good quality but not as high-end as a fluid dynamic-bearing fan, though this may not be expected at this price point.
The 120 mm fan should be sufficient for cooling but might be less powerful or quiet than a 140 mm fan. Power ratings and specifications are standard, with an 80PLUS Gold rating being good but not exceptional, it is expected for this price point.
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Front of the box.
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Power input side of the PSU.
Top of the PSU displaying the fan.
Bottom of the PSU displaying the specifications.
| +12 V | +5 V | +3.3 V | +5 Vsb | -12 V | |
|---|---|---|---|---|---|
| CURRENT | 62.5 A | 20 A | 20 A | 3 A | N/A |
| WATTAGE | 750 W | 110 W | 15 W | N/A | |
| 750 W | |||||
Please note that the above ratings are manufacturer advertised specifications.
When it comes to features and software, the Corsair RM750e has no selectable modes; its default and only mode is a hybrid fan mode where it will not run until it is needed. All standard protections are present on the power supply, and from testing, they all work, with reasonable OCP and OPP trip points.
The warranty differs from the RM750 and RM750x; it uses different capacitors and has a 7-year warranty, compared to the RM750 and RM750x's 10-year warranty.
Performance-wise, the Corsair RM750e is stable and solid. It has good regulation and electrical noise levels, providing reliable performance. The relatively low noise output is suitable for most setups, with ripple noise at extremely low loads being expected but manageable.
Load regulation is very good, presenting no issues for operation despite being a 750W power supply. As for audio noise levels, preliminary data suggests it is relatively low except when the fan speeds up at higher loads. We will be retesting and updating testing data for this power supply for audio noise levels upon the audio chamber's construction completion.
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The RM750e's efficiency meets 80PLUS Gold requirements without issues, sustaining brownouts at the expected level. The efficiency, especially at extremely low loads, is quite good. The RM750e tends to recover and activate again after power has been restored, rather than staying off like some other PSUs.
The OCP levels are within moderation, with the 5 Vsb exceeding that but failing at a small magnitude of current compared to other rails.
