The 5 Best PSU for RTX 4090 Reviews

Let us start the list with a well-known brand in the market, Corsair, who has been designing PSUs for the community containing a lot of quality, which has resulted in their positive reputation and their products being well received by the PC community.

The Corsair RM1000x is a high-end PSU with a 135mm magnetic levitation fan designed for high performance and cooler temperatures. It’s an 80+ gold-rated PSU which means that the PSU is capable of achieving peak efficiency of over 90% when under load, and due to the custom fan design and the chassis airflow, the temps stay down along with the noise levels so you can continue to use your PC for gaming or various other use cases without worrying about the power input.

The PSU is a fully modular unit, and the cables that come with it can easily be hidden and give your PC a clean look it deserves. It comes with various cables that make it a versatile PSU unit capable of powering all kinds of hardware, even the most modern ones, such as the latest GPUs requiring 12-pin connectors. It’s a suitable candidate for a PSU to power a PC that will host a high-end overclocked Ryzen or Intel processor paired with an RTX 4090.

The PSU also comes with a zero RPM mode which means that the fan life is prolonged as it shuts down when the system is not under load. However, at resource-intensive loads, the fan starts spinning again so that the temps can be maintained and the PC can continue to perform stably.

Premium Japanese capacitors are also present, which help deliver stable power to the system and offer surge protection. Microsoft Modern standby is also supported, allowing faster load times when the PC wakes up from sleep mode. The ten-year warranty by Corsair is the cherry on top, as the PSU has the performance and the horsepower to be included in our list of best PSUs for RTX 4090. It will serve you well and for a long time.


Next up on the list is another well-established brand in the market, Seasonic, which has been dishing out quality PSUs, making them a household name in the PC community.

The Seasonic prime tx-1000 falls under the premium grade PSUs, known for their stable power delivery and durability. The Prime TX 1000 belongs to the third-gen of the PRIME series, and they come with an updated design and connection cables which are an upgrade over their predecessors. The Seasonic prime TX-1000 is an 80-plus Titanium rated PSU capable of delivering over 94% efficiency.

Among the predecessors, the Rail of the PSU came with an Ultra Stable Voltage regulation system. Meanwhile, in this generation, an upgrade over that feature has been designed, and it has been named Micro Tolerance Load regulation, which allows the PSU to keep the output voltage within a very tight range. It can achieve 0.5% load regulation.

While the performance of the PSU is quite impressive, it is equally impressive in the temperature department, if not more. It comes with a Premium Hybrid Fan Control feature which intuitively allows the fan to slow down or speed up depending on the load. This also allows the users to keep the noise levels down and prolong the fan’s life since it will not always be spinning, and it will allow the oil to produce less friction, and the fan will keep spinning as well.

The PSU also comes with golden connectors, adding to the premium look, and it is more than capable of hosting a high-end PC with an RTX 4090. The PSU is fully modular and comes with a cable-free design inside the chassis for better airflow and power quality. Seasonic is quite confident in the durability of the PSU, and for that purpose, it gives a warranty of 12 years on it.

Overall, it’s a solid product and is a worthy addition to the PRIME series product lineup. It can handle your PC, whether you are gaming at the extreme level or creating content. It will be able to handle it without breaking a sweat.


The high-end community has so well received the ROG series product lineup that no matter what components we are writing about and recommending to our readers, whether it be GPUs, motherboards, casing, or PSUs, they are there as part of our list.

For this list, I recommend that you go for the ROG THOR 1200P, a 1200W Platinum Rated PSU that stands out from the competition due to its performance and not to mention the OLED Display that it comes with. The PSU comes with the patented ROG heatsinks, keeping things cool and quiet inside the chassis.

The Fan on the PSU comes with a Wing-Blade design and a 0dB technology that intuitively allows the fan to switch off in idle system states. Combined with the heat sink, the fan has an extended life, allowing for faster heat dissipation.

The top-end Japanese capacitors can be found inside the PSU, which is how the PSU can deliver over 89% efficiency at 100% load and 92% at 50% load. This also allows for less heat generation and adds to the PSU’s life, thus making it an all-around package. The PSU is fully modular, giving a PC a very clean outlook as you will only need to hook in the required cables. This is perfect for a system that will be hosting an RTX 4090 that needs a lot of input power to deliver the performance it is capable of.

Asus is confident about the ROG THOR 1200P, and that’s why it comes with a 10-year warranty. But the thing that sets this PSU apart is the OLED Screen, a one-of-a-kind screen that lets you monitor the PC power input in real-time. It’s a worthy PSU for the title of Overall Best PSU for RTX 4090.


For the next product, I have got one of the most reliable and stable power delivery PSUs out there by a household brand known as EVGA. EVGA has always focused on delivering products of the highest quality, be it GPU or PSU.

The same can be said for the EVGA SuperNOVA 1300 G2, 80+ GOLD 1300W, designed to give you stability, durability, and reliability. For the temps, the fan comes with a double ball bearing fan that gives the PSU chassis great airflow and helps keep the acoustics under control which allows for extending the PSU’s lifetime and keeping your PC running longer.

A single 12v Rail of the PSU can output a current of 108.3A, which is crazy stable if you ask me. The power requirements of the latest gen have been raised since they can deliver more performance, and for that, they need more juice which the PSU can provide.

It’s a fully modular PSU, which also allows for unnecessary clutter during PC building. Moreover, this modularity allows for a very clean PC look as these cables can be hidden, and no unnecessary cables will be hidden. The chassis has the highest quality of Japanese capacitors, which allows the PSU to deliver outstanding performance as they can deliver stable power input to a High-end PC featuring an RTX 4090.

The power rating of the PSU is 80 plus gold which means that the PSU is capable of delivering over 90% efficiency when the system is under load. Also, the PSU comes with multiple protection systems to protect your PC components from harm. These protective features include OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), OPP (Over Power Protection), and SCP (Short Circuit Protection).

With these many protective systems in place, the PSU will ensure that your system stays safe and your PC components are protected in case of a power failure or a voltage surge. EVGA is also very confident of its PSU to perform and is pretty sure that it is a durable product which is why they have given a 10-year warranty.


If you are still reading, I have saved the most overkill product for last. Cooler master is another quality brand that has carved its name in the annals of the PC community by carefully researching and delivering products tailored to their loyal consumer base demands.

The Cooler Master M2000 Platinum has no other purpose but to deliver raw power to a system that requires a large Power source. Originally built for deep learning machines, render farms, or mining farms, this PSU is capable of delivering power in a massive amount. PC components have become quite demanding in terms of power as they can deliver raw performance like never before.

PSUs capable of 2000W are rare as most systems don’t require this much power. Furthermore, the majority of them are only rated at 80+ gold. That isn’t the case here as Cooler Master has gone a step further and made this behemoth of a PSU platinum-rated, so while being capable of delivering a large amount of power, it is one of the most efficient PSUs out there as well.

The PSU is a fully modular one meaning that you can connect cables to the necessary jacks in the PCB, and the PSU will power them; this reduces the cluttered look of your PC and increases the PC’s airflow as well.

Since it’s a big boy and delivers a large amount of power, it also needs adequate cooling, provided by a 135mm long life fan constantly spinning to keep the temps down. This will generate noise, but the objective here is to keep things cool and not keep the noise levels down. At max load, the noise level can rise to 48 decibels. It also has multiple protection systems, such as OPP, OVP, OCP, UVP, SCP, OTP, Surge, and Inrush Protection.

Cooler master gives a 7-year warranty with the PSU, and it is one of the best massive-wattage PSUs out there. Powering up a normal high-end system containing an RTX 4090 will be a walk in the park, and while it’s on the expensive side, it will keep you from upgrading your PSU in the future should you add another RTX 4090 and run the system in SLI mode. Only then will the PSU be able to run to its max capacity, and it never hurts to have the power to spare.


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Mussab Ali
Mussab Ali

I love building gaming rigs and benchmarking games on them. I am a PC builder by day and content writer by night.