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Performance Rating
The new Corsair RM750x is the performance king in the 750W Gold category.
Noise Rating
The graph below depicts the cooling fan's average noise over the PSU's operating range, with an ambient temperature between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).
The older RM750x unit is notably quieter. Still, you cannot call the new one noisy.
Efficiency Rating
The following graph shows the PSU's average efficiency throughout its operating range with an ambient temperature close to 30 degrees Celsius.
A small efficiency boost, mostly at high loads, is required to meet the competition eye-to-eye.
Power Factor Rating
The following graph shows the PSU's average power factor reading throughout its operating range with an ambient temperature close to 30 degrees Celsius.
The APFC converter achieves high performance.
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Current page: Performance, Noise, Efficiency and Power Factor
Prev Page Transient Response Tests, Timing Tests, Ripple Measurements and EMC Pre-Compliance Testing Next Page Bottom LineAris Mpitziopoulos is a contributing editor at Tom's Hardware, covering PSUs.
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RAZ0RLIGHT Is there any reason why the 2021 revisions fan curve is so much more aggressive?Reply
This would be the perfect Gold PSU if they would have implemented the same fan curve as the older 2018 revision. -
I
Disagree. It's still very quiet and I'd rather a tiny noise increase to reduce temps, increase lifespan.RAZ0RLIGHT said:Is there any reason why the 2021 revisions fan curve is so much more aggressive?
This would be the perfect Gold PSU if they would have implemented the same fan curve as the older 2018 revision.
This is probably what Corsair determined as well through wear testing, decided that not only would that reduce their warranty fulfillment costs but also improve customer satisfaction by having a longer lasting product.
If you don't care about the warranty, crack it open, put a few tens of ohms 2W resistor in series on the fan power lead, or just swap in a lower RPM fan, or mod the fan control circuit, or wear earplugs, or put the system under your desk, or get a cat plus 100 mice let loose all at once and you'll never even notice the very slight fan noise.
Besides, it's all a bit silly. If your system is pulling that many amps it's going to need its own more audible fans running anyway. For good lifespan. An internal, reward-facing exhaust, oriented fan is the least audible way to pull or push air through a system. -
Russll HelloReply
A few days ago I bought a Corsair RM750x (2021). Now the power supply consumes little (20-30%) because it works without a video card (AMD 5700G only).
The Aida64 and OCCT show voltage on rail +12V - 11.884V, and on rail +3.3VCC - 3.248V, on rail +5V - 4.980V (computer idle, browser only).
In the game, the voltage rises and shows on rail + 12V - 11.980V (maximum), and on rail + 3.3VCC - 3.264V (maximum), on rail + 5V - 5.020V.
Is this normal at all.?
There is no full 12V on rail + 12V, and no full 3.3V on rail + 3.3V..
Maybe I should return the product to the store.?
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drivinfast247
Perfectly normal operation.Russll said:Hello
A few days ago I bought a Corsair RM750x (2021). Now the power supply consumes little (20-30%) because it works without a video card (AMD 5700G only).
The Aida64 and OCCT show voltage on rail +12V - 11.884V, and on rail +3.3VCC - 3.248V, on rail +5V - 4.980V (computer idle, browser only).
In the game, the voltage rises and shows on rail + 12V - 11.980V (maximum), and on rail + 3.3VCC - 3.264V (maximum), on rail + 5V - 5.020V.
Is this normal at all.?
There is no full 12V on rail + 12V, and no full 3.3V on rail + 3.3V..
Maybe I should return the product to the store.?
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stateofdade Just purchased one of these based on this review. Thanks for the information and the deep dive into this PSU.Reply -
NoxMorbis I can't believe they used in cable caps. Shoddy and ridiculous. I have the 2018 RMX and I HATE those inline crap caps. I also looked at the soldering and found flux still stuck to the joints. Shoddy soldering is apparent. Geeze, what a quality control step down. I just think in line caps are fudging, although In know most do it.Reply