The popular Corsair RMx line got an upgrade, which brought it up to the ATX v3.1 standards, meaning that all new RMx units have now 12V-2×6 connectors and can deliver up to 200% of their max power.
The Corsair RM750x ATX v3.1 will be included in my best ATX v3.x & PCIe 5.x PSU picks article.
The Corsair RMx line received an update to meet the ATX v3.1 requirements, which require, among others, a PSU to withstand 200% of its max power for short periods. Another unique feature of this new models is the fan speed control knob, through which you can adjust the fan’s speed at light loads, from zero RPM up to full speed. For instance, when you select a 500-600 RPM fan speed at light loads, this will be the starting point and increase once the PSU’s thermal load increases. So, instead of providing a switch to select or deselect the fan’s semi-passive mode, Corsair provided the option to choose the fan’s starting speed.
In today’s review, I will evaluate the lowest capacity member of the RMx ATX v3.1 line, which has a maximum power of 750W. I have already assessed the 1000W and 850W models.
750W ATX v3.1 PSU Reviews:
- 1st Player NGDP 750W PSU Review
- ASUS TUF Gaming 750W Bronze PSU Review
- be quiet! System Power 10 750W PSU Review
- Cooler Master GX III 750W ATX v3.0 PSU Review
- Enermax Revolution D.F.12 750W PSU Review
- FSP VITA GM 750W ATX v3.1 PSU Review
- Sharkoon Rebel P20 750W ATX v3.1 PSU Review
- Thermaltake Toughpower PF3 750W PSU Review
- Thermaltake Toughpower GF A3 750W PSU Review
- Thermaltake Toughpower GF3 ARGB 750W PSU Review
- Thermaltake Toughpower GF3 750W ATX v3.0 PSU Review
- Thermaltake Toughpower GF A3 750W ATX v3.1 PSU Review
- XPG Core Reactor II VE 750W PSU Review
- XPG KYBER 750W ATX v3.1 PSU Review
- Manufacturer (OEM): Channel Well Technology (CWT)
- Max Power: 750W
- Cybenetics Efficiency: [115V] Cybenetics Gold (87-89%), [230V] Cybenetics Gold (89-91%)
- Noise: Cybenetics A+ (15-20 dB[A])
- Compliance: ATX v3.1, EPS 2.92
- Operating Temperature (Continuous Full Load): 0 – 50 °C
- Alternative Low Power Mode support: Yes
- Power 12V combined: 750W
- Number of 12V rails: 1
- Power 5V + 3.3v: 150W
- Power 5VSB: 15W
- Cooling: 140mm Fluid Dynamic Bearing Fan (NR140HP)
- Semi-Passive Operation: ✓ (Adjustable Fan Speed)
- Modular Design: Yes (Fully)
- High Power Connectors: 2x EPS (2x cables), 3x PCIe 6+2 pin (3x cables), 1x PCIe 12+2 pin (600W)
- Peripheral Connectors: 8x SATA (2x cables), 3x 4-pin Molex (1x cable)
- ATX Cable Length: 610mm
- EPS Cable Length: 750mm
- 12+2 pin PCIe Cable Length: 650mm
- 6+2 pin PCIe Cable Length: 650mm
- Distance between SATA / 4-pin Molex: 115/100mm
- In-cable capacitors: No
- Dimensions (W x H x D): 150 mm x 85 mm x 160mm
- Weight: 1.77 kg (3.9 lb)
- Warranty: 10-years
- MSRP (excluding VAT): $120
Power Specifications
| Rail | 3.3V | 5V | 12V | 5VSB | ||
| Max. Power | Amps | 20 | 20 | 62.5 | 3 | |
| Watts | 150 | 750 | 15 | |||
| Total Max. Power (W) | 750 | |||||
Hi Aris,
I really enjoy your content, though I rarely buy a PSU and try to keep it that way. I’m assembling a system that will consume 475w at peak CPU and GPU load (though that will only happen during a synthetic benchmark). For headroom and future-proofing, I’m planning to buy a 750w PSU. What would you recommend between an XPG Core Reactor II, Thermaltake GF3, and Corsair RMx? Is the Corsair the best choice for an Nvidia GPU given the included 12v-2×6 cable? I’m given to understand that the 6+2 to 12v-2×6 adapters are, when installed correctly, potentially better than a single 12vhpwr cable. It also seems that the Corsair is most reliable, based on consumer reviews. The XPG and Thermaltake are both 33% cheaper than the Corsair, so you could convince me to save the money but only if you felt the others could be equally reliable.
Hi! I would go for the RM750x (ATX v3.1). In general, the RMx line is one of the best out there. TT, I don’t trust it so much because I cannot know from whom it is made anymore. The XPG is pretty good, but I still prefer the Corsair unit.
Thank you!
Hi Aris,
I got this PSU after comparing many of the models you reviewed, manly for it’s low noise output and overall good performance. However my unit has extremely loud coil whine. I got it replaced under warranty, but the new one has the same issue. I assume this is happening because the PSU is almost exclusively operating in Burst Mode, since my system is drawing very little power (Zen 5 CPU, no GPU). Installing a GPU might resolve this, but that’s not something I can do right now. What would you suggest to resolve this issue? Get a lower rated Unit? A different model? Thanks for all these great reviews and work over at Cybenetics!
hm coil whine is a huge issue and also has to do with the rest system components. A lower rating PSU might help yes, but still it is mostly a trial-and-error procedure.
Tanks for taking the time to reply! I will give the new RM650e a shot, since it also performed well and has low noise output. It’s a shame since I got a great deal for the RM750x at 99,99€ on Black Friday, but it is what it is.
I just order this, but i cant get the Seasonic out of my head, is it worth another 20 usd over this one? Im very casual gamer and will be going in a 13600+4070 combo hopefully
Nice review, i buy this PSU(130 euro) and is amazing.
Hi, on page 8 “protections” it says 1046w for the OPP, but how is that 123% of 750w ? It would be 123% for a 850W unit, but for a 750W unit 1046W is 139.5%. If the OPP is set at 123%, then shouldn’t that be 922.5W ?
yeah the 850W unit’s table was there. Fixed now, thanks!
Thank you for the detailed review and your time spent for testing the units.
I just bought this unit on Amazon during BlackFriday deal because of good result in your test.
Aris did PCCooler YS1200 basically same PCB parts & design of Seasonic GX/PX-1200 ?
U mean the “Same Platform” thing?
Don’t remember sorry. please check Cybenetics if there is parts description for both units there.
Thank you for all these PSUs reviews !
you are welcome!