What seems like a staple in the best power supply range, Corsair’s RM series has a lot of popularity in the market for a dependent and good quality choice. With that, we take a closer look at what the RM750x has to offer and what it brings to your gaming build. The 2021 model offers a great selection with the design and quality as expected from the team behind it. In that case, we take a look at what it has to offer.
- Wattage: 750W
- Form Factor: ATX
- Rating: 80 PLUS Gold, Cybenetics Gold
- Design: Fully Modular
In general, the Corsair RM750x is an all-around strong choice of power supply. It brings a middle-of-the-pack feature and performance that make it a strong value choice. Especially considering the price and longevity expected from it. Along with a high-quality build and components, it is a lasting solution for many builds to come. With the 750W likely to be plenty for years it just lacks the ATX 3 standard and native cable, which you have to instead order separately.
- Long term 10 year warranty
- Excellent build quality and component design
- Very quiet Mag Lev fan
- Not native ATX 3
- Plenty of plastic packaging is still in use
Design
The Corsair RM750x comes with nothing too spectacular and defining that makes it any different from some standard power supplies. But that doesn’t detract from it as it does not opt for anything flashy. Although it still utilizes a fair bit of plastic packaging as the 2021 model, and unlike we’ve seen in the likes of our HX1000i review. But that might change with time and production if it keeps moving to more eco-friendly solutions.
Corsair RM750x info sticker, Image by PCWer
Corsair RM750x power connectors, Image by PCWer
Corsair RM750x side, Image by PCWer
Corsair RM750x back power input, Image by PCWer
Corsair RM750x fan, Image by PCWer
Corsair RM750x box profile, Image by PCWer
Corsair RM750x box contents, Image by PCWer
Corsair RM750x end profile, Image by PCWer
With a fully modular design, it has a range of cables you can choose from, but crucially it does lack native ATX 3 support. It’s easier to use those with the latest Nvidia graphics cards than an adapter and potentially safer, but you can order a 12-pin cable separately from Corsair if you want to. Or with the Type 4 standard, you can always get a custom set additionally. There is also a lack of PCIe cables in general as you get two, although they are both daisy-chained if you need to double up. There are also two EPS cables for any powerful motherboards and CPUs that need all the power.
the Corsair RM750x is an all-around strong choice of power supply
With a 750W power rating, it is a rather strong choice for a load of components. Plus it comes in with an 80+ and Cybenetics Gold efficiency. These ratings aren’t the highest but are for a good level when looking for a good value somewhere in the middle without wasting a load of energy either. It also opts for a 135mm magnetic levitation fan which is aimed to give a great performance with little noise as we’ll see later on.
Size
The PSU comes with a more standard ATX sizing, measuring 150 x 86 x 160mm it’s an easier-to-fit power supply. It doesn’t extend much beyond a cubic shape, it’s just the cables that extend out that you might have to worry about but it’s a lot more compatible that way. It’s neither a Shift nor an extended version of a power supply so it’s a lot easier to handle, but neither is it an SFX PSU which you can utilize in much smaller builds.
Corsair RM750x inside PC, Image by PCWer
Corsair RM750x on top of box, Image by PCWer
Corsair RM750x test setup, Image by PCWer
Performance
Plugging the PSU into our test bench we see how well it performs in powering our system and the loads it provides. Although we don’t have a testing machine to go in depth there are other certifications we can look to as well to see how well it does. But for our test, we use it with the following components.
- Ryzen 9 7950X CPU
- ROG X670E Hero motherboard
- Corsair Dominator Titanium 64GB 6600
- ROG Ryujin II 360 AIO CPU cooler
- MSI Gaming X Trio RTX 3090
The main power demands of a PC are the CPU and GPU and areas that have a rather high TDP to test the power draws. They come in with a 170W and 350W rating combining to a 520W combined. But factoring in some overhead and the rest of the components it’s no surprise the recommendation is 750W for the graphics card so it is the right PSU for the job.
reliable and powerful choice for powering your systems
Starting off with the power draw at idle that sat somewhere around 127W and powering the computer without doing too much. Whilst running Furmark 2 CPU and GPU stress tests we loaded up the power requirement quickly. After settling in the RM750x had no troubles running the PC at its desired power as during the testing the power meter showed it running around 706W. Which does show it encroaching on that recommended power rating and that ensures you get the most out of your system altogether.
In that same scenario, we tracked the power draw of the components and the temps they reached during that time. There we see that that GPU does in fact reach a peak and average of around 360W whilst the CPU sits around 200W of power.
Corsair RM750x turned off power draw, Image by PCWer
Corsair RM750x max utilization power draw, Image by PCWer
Corsair RM750x idle power draw, Image by PCWer
Corsair RM750X package power, Image by PCWer
We also look to Cybenetics testing to see how well it performs in the lab, as the standard puts them through rigorous tests to see how they fare and an overall look at the performance of the model. There we see that both the efficiency and noise are very strong for the unit.
Starting off with 115V power input, the average efficiency reaches around 88.0%, with the 5VSB rail getting to 78.1%. Whilst the sound output averaged at around 27.98dB(A). Whilst at 230V the average efficiency increases to just over 90.2% with the 5VSB just around 77.5%, with the sound output averaging 28dB(A). All in all a solid Gold efficiency and A- sound rating from the testing.
Warranty
The RM series has a high-quality build and component list to its name, including Japanese capacitors. That’s why it has strong support behind it with 10 years of warranty. That makes it a strong choice for your next build or many to come, as it’s unlikely that you’ll need to upgrade or replace it in your next build and you can just carry it forward.
GPUs to pair with the PSU
The RM750x is a powerful and sturdy PSU that can certainly provide power for a variety of modern GPUs. With even the top-level options a worthy option to pick that only requires the 750W. The top-level RX 7900 XTX or RTX 4080 Super are perfect choices to match with the PSU to get the most power to the system and get an excellent performance on top of that.
Conclusion
Overall, there is a reason the RM750x is a fan favorite, it’s a reliable and powerful choice for powering your systems. Combining great performance with good value balances what everyone looks for in building out a great system with nothing to worry about. As it has a long warranty and excellent components including the fan, you get a quiet and strong choice for many years to come.
- Wattage: 750W
- Form Factor: ATX
- Rating: 80 PLUS Gold, Cybenetics Gold
- Design: Fully Modular
