Best PSU For RTX 4090 (Recommended Gaming, 850W, 1000)

Nvidia Geforce RTX 4090 Graphics Card is a high-end graphics card and it requires a lot of power to function properly. The best power supply for RTX 4090 is necessary to ensure that the card works without any problems. The recommended power supply for the Nvidia Geforce RTX 4090 Graphics Card is 650 watts or greater.

Some might think that spending more on a PSU is wasted money, but we see it differently. The best PSUs run flawlessly and can last for future builds; they’re also more efficient than their cheaper counterparts, so you get your electricity usage percentage down with each unit purchased. 

There’s no point in buying any old brand at low prices compared to other brands that make good products. The latest Intel specifications include PSU timing requirements that address the Alternative Sleep Mode (ASM), an ultra-fast wake from sleep mode. This can be done with Microsoft’s Modern Standby example of ASMs in action – although there aren’t any compatible motherboards or PSUs, you’ll have plenty before they are needed.

Our Recommended list of the Best PSU For RTX 4090

  1. Corsair RMX Series, RM750x, 750 Watt Power Supply
  2. EVGA Supernova 1200 P2 80 Power Supply
  3. EVGA SuperNOVA 850 Ga Power Supply
  4. ASUS ROG STRIX 1000W Gold PSU
  5. NZXT C850 – NP-C850M – 850 Watt PSU 
  6. Thermaltake Smart 700W 80+ White Certified PSU

What are the Benefits of using a Power Supply unit with a Modular Cable Design?

There are several benefits to using a modular PSU, the most obvious of which is improved cable management. Removing excess cables from the unit can help declutter your case and improve airflow, leading to better cooling performance. Additionally, modular PSUs tend to have higher efficiency ratings than non-modular units, meaning they will waste less power and generate less heat. 

The most frequent type of PSU connection is the 24-pin ATX connector, which links the power supply to the gaming motherboard. Other common connectors include the 4+4 pin EPS connector, which is used to provide power to the gaming CPU, and the 8-pin PCI Express connector, which is used to power graphics cards.

The most common PSU form factor is ATX, which is compatible with most desktop computer cases. Other popular form factors include SFX and microATX, designed for small form factor cases, and ATX12V, designed for high-end gaming PCs.

1- Corsair RMX Series, RM750x, 750 Watt Power Supply

Corsair RMX Series, RM750x, 750 Watt Power Supply

The Corsair RM750x is a power supply that is compatible with RTX 4090 graphics cards. It has a modular cable design, which allows you to choose the cables you need and keep the ones you don’t. This power supply also has a zero RPM fan mode, which means that it will stay silent until it’s needed.

The RTX 4090 is a powerful graphics card that requires a compatible power supply. The Corsair RM750x is a great option for powering the RTX 4090. It is a 750 watt power supply that is 80+ Gold certified, meaning it is highly efficient. It also has all of the required cables to support the RTX 4090. In addition, the Corsair RM750x is fully modular, so you can easily install it in your case and route the cables as needed. Overall, the Corsair RM750x is a great power supply option for the RTX 4090.

The Corsair RM750x is a gaming power supply that is fully compatible with the latest PC hardware. It has 750 watts of power and comes with all of the cables required to connect it to a gaming PC. TheRM750x is also reasonably priced, making it a good option for budget-conscious gamers. In terms of performance, the RM750x delivers consistent power and is very quiet, even when under load. Overall, the Corsair RM750x is a great option for gamers and this is also perfect for Cryptocurrency who are looking for a reliable and affordable power supply.

Corsair’s RM750x is a high-end power supply, and it features some top notch parts like On Semiconductor FETs for smooth operation with low noise levels. The Japanese caps by Chemi-Con provide excellent performance in terms of efficiency while also being corrosion resistant; Rubycon makes sure there aren’t any voltage spikes when you’re not using your computer! And last but certainly not least: plenty of Ferrite Power Cap Polymer (FPCAP) polymer electrolytic capacitors ensure that this unit can handle even extreme builds without Looking too bottle necked or experiencing surplus heat generation due to overcompensation from other components inside


  • 80 plus certified
  • Continuous power design
  • Ultra quiet 120 millimeters fan
  • Five-year warranty
  • Budget-friendly

2- EVGA Supernova 1200 P2 80 Power Supply

EVGA SuperNOVA 850 Ga Power Supply

The EVGA Supernova 1200 P2 is a high-quality power supply that is perfect for those with RTX 4090 graphics cards. It has plenty of power to run even the most demanding games and applications, and it does so quietly and efficiently. The Supernova 1200 P2 is also very reliable, meaning you can count on it to deliver power when you need it most.

The EVGA SuperNova 1200 P2 is the most powerful system Yeti has ever encountered, and it’s capable of maintaining hard drives at maximum speed for longer than any other model. This fully modular power supply is built with a 100% Japanese capacitor, a massive 140mm double ball bearing fan for silent operation, and 10 Years. Backed by an award-winning ten-year warranty and 100% Japanese capacitor design, the EVGA SuperNova is not only the right choice for your system today, but for your system tomorrow.

The EVGA Supernova 1200 P2 is one of the market’s most powerful and efficient power supplies. With a massive 140mm double ball bearing fan for silent operation and 100% Japanese capacitor design, the EVGA Supernova 1200 P2 is built for long-term reliability. Backed by an award-winning ten-year warranty, the EVGA Supernova 1200 P2 is the perfect choice for your high-end gaming or professional gaming PC build.

The new EVGA 1200 P2 and 1000 PSUs from Super Flower will be available soon. These high-quality power supplies are 80 PLUS PLATINUM certified. They feature all modular cables with a single +12V rail that can deliver up to 140mm of cooling fan airflow at full capacity while operating in silent mode when needed! The ten-year warranty on these models also comes standard.

There’s no need for registration or extra because you’re getting it here first before anyone else gets them. EVGA is a company that specializes in producing graphics adapters and motherboards for both Intel-based computers and NVIDIA ones. They have been around since 1999, operating out of California’s Brea district. Depending on your needs, they continue to grow their product line with an ever-increasing number of high-end power supplies or budget-minded options.

The EVGA SuperNOVA 1200 P2 power supply is a cutting-edge industry leader that raises the bar with its high efficiency and continuous wattage. In addition, this highly anticipated product features an elegant design, which can reduce case clutter for improved system performance by using only top-of-the-line components like Japanese capacitors to ensure stability during use; it also comes equipped 100% fully modularly—eliminating any unnecessary wires inside your computer chassis or tower while saving valuable desk space when not in use.


  • To improve airflow and reduce clutter, the system is completely modular.
  • The fan is a size 140mm and has double ball bearings.
  • 10 Year Warranty
  • Dimensions: 5.91″ x 3.39″ x 8.27″ (W x H x D)
  • Weight: 4.85 lbs. / 2.2 kg
  • Input Voltage: 100 – 240 VAC
  • Input Frequency Range: 50/60 Hz +/ – 3 Hz

3- EVGA SuperNOVA 850 Ga Power Supply

EVGA SuperNOVA 850 Ga Power Supply

The EVGA SuperNOVA 850 G3 is an excellent budget-friendly power supply that is perfect for use with RTX 3080 or RTX 4090 graphics cards. The power supply features a single 8-pin PCI-E connector and a single 6-pin PCI-E connector, ensuring that your system will have all the power it needs to run even the most demanding games and applications. The SuperNOVA 850 G3 also features 80 PLUS Gold certification, ensuring that you’ll get the most bang for your buck when it comes to power efficiency.

The EVGA SuperNOVA 850 G2 has set itself apart from the competition by being one of the market’s most silent, efficient, and innovative power supplies. This device features 100% Japanese capacitors, LLC resonant circuit design, and a DC-DC converter design to improve 3.3V and 5V stability for optimal performance. Furthermore, the modular design reduces clutter and improves airflow for a neater appearance, while the double ball bearing fan and EVGA eco mode improve reliability by ensuring quieter operation. In addition, the power supply comes with an industry-leading ten-year limited warranty and unparalleled customer support from EVGA.This EVGA SuperNovA is compatible with i7-12700k PSU.

With a minimum 90% efficiency rating, this unit offers you the best power standards in its class. A highly efficient 80 PLUS Gold certification means that under typical loads, almost nothing is wasted by our machines, and they can maintain high levels of performance even when running continuously for hours on end. It is always a pleasure to see which company will take up the mantle from one of our favorite component providers. With super compact dimensions and high build quality, it’s clear that EVGA has created an upgraded version for this past year’s release–Ga compared with their FSP-made GPU winner (G5). The competition seems close but still leaves them ahead in power, delivering 850W on demand while maintaining excellent performance levels.

The new EVGA Ga line is an amazing upgrade for gamers, and power users’ models range from 750W up to 1000 watts, so there’s one perfect for your needs no matter what you’re doing! We already tested out their flagship model, which performed beautifully – now, let’s see if this middle member can match its performance levels before earning herself a place on our best PSUs article next time around.


  • Silent, efficient, and innovative power supply
  • Resonant circuit design for LLC
  • Ways to improve stability for both 3.3V and 5V DC-DC converters
  • Fully modular design to reduce clutter and improve airflow
  • Dual ball bearing fan for greater durability and quiet operation
  • Ten-year limited warranty and unparalleled EVGA customer support



If you’re looking for an uninterrupted power supply for your RTX 4090-powered gaming PC, the ASUS ROG STRIX 1000W is an excellent option. This PSU is designed with gamers in mind, boasting 100% Japanese capacitors and a full suite of protections to keep your system running smoothly. It also comes with a handy LED indicator that shows you when your system is drawing too much power and this amazing power supply is also supported by AMD RX 6500 XT,so you can make adjustments as needed.

Asus ROG Strix 1000W Gold PSU is the most powerful power supply in the ROG Strix lineup. This model has a higher maximum power output of 1000 watts and an 80 percent efficiency rating. The fully modular design lets you keep your rig neat. The fan is axial-tech, with a smaller hub that allows for longer blades and a ring that increases downward air pressure. The 0dB technology almost eliminates noise, so you can enjoy gaming without being disturbed. The 10-year warranty included makes this power supply a wise investment. Several scientific studies have found that lower temperatures result in a longer lifespan and reduced noise pollution. In addition, the ROG Heatsinks cover critical components with a sleek design, which will keep your system running cool for years.

The fan blades’ design sets axial-tech fans apart from others. Instead of running in a single direction like most other models, these have two balls that allow for increased airflow and longer life due to their dual-bearing system. This also prevents corrosion because there’s no metal-on-metal contact between them. The 0dB Technology allows you to play video games without making much noise. The 80 Plus Gold Certification is achieved with Japanese capacitors and other premium components that reduce noise for an improved experience, even when playing high-level games. 

The ROG Heatsinks cover all essential components, resulting in lower temperatures and less noise. Axial-tech fan design features a smaller hub with longer blades for more powerful performance while maintaining stability at high speeds; it also has an added barrier ring that increases downward air pressure, which helps keep heat away from sensitive electronics like graphics cards or memory ICs under fans where liquid can be easily absorbed by these component modules causing damage over time due in part. 10-year warranty included.


  • 1000W of continuous power delivery
  • 80 plus gold efficiency
  • Fully modular design
  • Axial-tech fan with smaller fan hub and longer blades
  • 0dB technology for light gaming in relative silence
  • 10-year warranty included

5- NZXT C850 – NP-C850M – 850 Watt PSU 

NZXT C850 - NP-C850M - 850 Watt PSU

The NZXT C850 is a high-quality power supply that is perfect for users who require extra power for their RTX 4090. This unit provides 850 watts of continuous power, making it a great choice for gamers and power users alike. The C850 also features premium components and circuitry, as well as a large number of protections and safeguards to keep your system running smoothly. Overall, the NZXT C850 is an excellent choice for anyone looking for a reliable and powerful power supply and this is also perfect choice for i9-12900KS PSU.

The NZXT C850 is a high-end power supply designed for gamers and enthusiasts. This model has Gold Certification from 80 Plus, which is extremely efficient compared to other PSUs on the market. The PSU is also very quiet, thanks to its Zero RPM Fan mode. Finally, the modular design ensures easy installation and less clutter. The sleeved main cables are also a nice touch and resist heat damage and fraying.

You can use the power of reliable energy to guarantee your home or company runs smoothly. We ensure that every watt goes as far as efficient performance and quieter operation, so you’re not interrupted during those critical hours when it matters most. The Zero RPM Fan mode allows the fan to operate silently under low-load conditions with just a button push. The C series PC cases are perfect for any gamer looking to install their system with the latest GPUs. With this flexibility, you’ll be able to keep up on all your gaming needs without worrying about compatibility issues or having too few slots left over after installing new hardware.

The modular design of this product makes it easier to install, and you can use just the cables needed for your installation. This means there’s less clutter between outlets or on top where they might get tangled up with other unused wires. In addition, the sleeved main cables look and work great, delivering greater durability thanks to their tough fabric construction. They also resist heat damage and fraying for a long-lasting result that you can be proud of.

The C850 is a great choice for gamers looking to build powerful rigs. It can support up with an AMD Ryzen 9 3900/3950x or Intel Core i9-10900K and still provide enough juice if you want more performance from your graphics card (e..g., Nvidia RTX2080Ti). As long as they use standard-size cables that are compatible between both parts, this shouldn’t pose any problems when it comes time to modify them.


  • Gold Certification from 80 Plus
  • Zero RPM Fan mode for quiet operation
  • Modular design for easy installation
  • Sleeved main cables for durability and longevity

6- Thermaltake Smart 700W 80+ White Certified PSU

Thermaltake Smart 700W 80+ White Certified PSU

Thermaltake Smart 700W is a quality PSU that is perfect for RTX 4090. It has all the features you need to keep your system running smoothly, including plenty of power and connectors for all your components. It’s also very quiet, so you won’t even know it’s there. Overall, this is an excellent PSU and a great value for the price.

The Thermaltake Smart 700W is one of the power supplies available at a low cost. It would suit someone who wants to construct a PC for playing games without breaking the bank. The power supply is 80+ certified, meaning it is more than 80% efficient. It has a continuous power design and is ready for Haswell CPUs. The ultra-quiet 120mm fan helps keep your PC cool and quiet. The Thermaltake SMART DPS G Bronze Series is a line of digital power supply units (PSU) that offers varying degrees of energy efficiency and environmental responsibility. They feature 80 PLUS bronze certification with a semi-modular design to accommodate any mainstream build under any circumstance, making them ideal for office spaces where space may be limited or if you want an efficient unit.

The DPS G Smart Power Management system offers three intelligent platforms, including the PC APP 3.0 and SPM Cloud 1.0, to help monitor your power supply units and save energy by reducing CO2 emissions for future generations. In addition, the Thermaltake Smart RGB 700W PSU is a pioneer in the industry, as it has been one of few companies to incorporate colorful lighting into its products. Now they’ve created an entire line with 15 different modes for you. This powerful power supply is also compatible with AMD RX 6400 PSU , i5-12600K and this is also supported by graphics cards like RTX 3090 Ti.

The semi-modular cabling design of this unit allows you to use only those cables needed, resulting in improved airflow and reduced system cutter temperature. Furthermore, it provides up to 87% efficiency at 20-100% load for cutting electricity costs while promising the lowest power losses in real-world conditions.

The high-quality capacitor delivers outstanding results with low impedance characteristics. As a result, the reliable operation lasts for a longer period. In addition, it has excellent reliability to enhance the power supply’s ability to provide clean signal transfer through superior filtering capabilities, which results in better sound absorption, and less distortion when playing back audio files or watching videos on your computer screen.


  • 80+ White Certified
  • Continuous power design
  • Ultra-quiet 120mm fan
  • 5-year warranty

Guide to Best PSU For RTX 4090 Build

Output Wattage

The output wattage is the first thing you notice when shopping for a power supply. You’ll find various sizes and ratings, such as 550W or 750W, depending on your needs–the higher number means more juice! However, make sure to choose wisely because if they’re too low, this could cause problems with components like graphics cards that require high consumption levels (and heat).

You can keep some headroom with a higher power supply than requirements for future upgrading of components. For example, 550W or 750 watts are enough when you want to build an entry-level gaming PC, but if your budget allows it go ahead and get one that supplies up through 850 W because this will allow more flexibility down the line.

Power Supply Design

Power supplies come in three flavors – non-modular, semi-modular, and full. Non Modular PSUs don’t have removable cables; on the other hand, you can take out select connections with a modded power supply for better organization of your wires inside glass cabinets if needed! Semi-Modermalised ones allow removal of specific sections according to the user’s requirements while others remain fixed at their positions. But, of course, that entirely depends on the situation in which it is set up and tested.


When it comes to power supplies, you want something that wastes as little of your hard-earned money on wasted and unnecessary conversions. There are two things in particular about this piece of equipment for gaming PCs that make efficiency important: The first is how efficient each unit renders its output; second, but just as importantly- if not more so! -is what percentage of these PSUs have been certified at achieving standards ranging from 60%-grade down to 20%. You’ll often see gold grades assigned when talking about high.


The 24 PIN cable is the most important connector on your motherboard. If you have an expansion card or two, make sure they are easily connected to this powerful doubled-up port! You also need eight 6-pin GPU cables for graphics processing units (GPUs) and six four-pin CPU sleeves, so RTX 4090 CPUs don’t overheat. At the same time, gaming hardcore at high resolutions – not all motherboards require these extra supplies, but it’s a good idea to get some spares just in case anything goes wrong during installation.

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