Best PSU For RTX 4090 (Compatible, 750W, 850W, 1000W)

Nvidia GeForce RTX’s new flagship high-end RTX 4090 Graphics card is outstanding in performance. However, this card also requires much power to run smoothly and efficiently, and you want the best PSU for RTX 4090 for it. The 4090 RTX is recommended for 850 watts just for its full potential.

On the other hand, the high-end rig will work with ASUS Rog Thor 1200 Certified and 1000W Power Supply. Being in 80 Plus Gold Certification, they are also brilliant options for the latest hardware uses.  

With the latest processors, graphics cards, and gaming motherboards, PSU also comes with the latest and brilliant features for compatibility with new hardware. In this post, you get all the power supplies with fantastic features. First, you can get 750 to 1200 watts for efficient performance. 

A fully modular cable design makes the system unique and clean, uses important cables, and provides space for airflow. If you want an affordable power supply, the Corsair CX750F RGB, 750 Watt, and Thermaltake Smart BX1 750W is the best choice. For your rig to make a more beautiful and aesthetic look, the ASUS Rog Thor 1200 Certified comes with the RGB lighting feature and is also brilliant for the latest PC hardware. 

With 1000 to 1200 watts, you can get the 80 PLUS platinum efficiency up to 94.1%, making the system more reliable and getting high performance in Graphics. Such as, be quiet! Straight Power 11 1000W offers the Platinum certification. All products also have a 5 to 10 years warranty and full protection features like DC-to-DC conversion that is protected from short circuits. 

List of Top Rated Best PSU for RTX 4090

  1. Be quiet! Straight Power 11 Platinum power supply
  2. ASUS Rog Thor 1200 Certified 1200W Power Supply
  3. Thermaltake Smart BX1 750W Bronze Power Supply
  4. Corsair CX750F RGB, 750 Watt Power Supply
  5. Power Supply 80 Plus Gold Certified Fully Modular PSU
  6. SilverStone Technology 1200 Watt Power Supply

1- Be quiet! Straight Power 11 Platinum power supply

Be quiet! Straight Power 11 Platinum power supply

If you want a higher-wattage power supply for a high-end RTX 4090 card to reach its full potential. Be quiet! Straight power offers high 1000 watts, including less power consumption and quieter operation, which is brilliant for your high-end system. Without noise problems, you can work with full concentration and enjoy games.  

The design of this power supply is very impressive, and modular cable management makes your system more elegant and clear. Because it is modular cabling, you can use just the cables that you need for transferring. Plus, Heaving the DC side inside the PSU body and, due to this, improving the airflow and pushing the components’ lifetime to a maximum.

Thanks to its 80 PLUS platinum efficiency of up to 94.1%, the system is more energy-efficient and reliable. Moreover, along with this, you can get the DC-to-DC conversion that is protected. As a result, you can get reliable operation for the new generation of graphics cards and processors under heavy cross-loading conditions.

As its name suggests, it will not make any noise when its fan cools the system. Come with 135mm silent wings fans that provide excellent airflow. And also come with advanced fluid dynamic bearing fans that offer super-long life and minimal power consumption. In addition, the funnel shape of the fan increases throughput air which is good for higher cooling performance and this PSU is also supported by RTX 3050 .


If you want a mid-range price Power supply, then we can be quiet! Straight 11 power 1000 watts to Corsair HX Series 1000 watts. Both have the same features, like modular, 80 Plus certification Platinum, but the price differs. So if you want 50$ then buy, be quiet! Straight 11 power 1000 watts.


  • Platinum certification 
  • Fully modular
  • Silent fans 
  • ATX form factor
  • 5-year warranty


  • It can be a little heavy 
  • No RGB

2- ASUS Rog Thor 1200 Certified 1200W Power Supply

ASUS Rog Thor 1200 Certified 1200W Power Supply

ASUS Rog Thor is a brilliant choice for users who want nothing but the best because it has a new power supply, great features, and high energy. New components like processors and RTX Graphics card 4090 are brilliant choices if you want extreme-level energy for your rig. Each feature is one-of-a-kind; for those who want high energy for their system.

Thor Platinum utilizes high-end Japanese capacitors for efficient operation and performance. Such as comes with 80-plus platinum certifications and has guaranteed 89% efficiency at 100% load and 92% at 50 loads. This feature increases your system efficiency and reliability, reducing fan noise. In addition, wing blade 135mm fans make your system cool and increase the component’s lifespan.

Fan 0db technology allows the fan to switch off when using lower wattages and enables silent operation. This PSU design is brilliant because the integrated OLED panel helps draw real-time power, and you can check how much power your rig uses. Moreover, addressable Aura RGB LEDs lighting allows you to create your system’s custom look across your gaming rig, peripherals, and components.

In addition, cable management is fully modular; you can use needed cables in your system. Plus, it also included one 24-pin, four 6+2pin PCIe, and two 8-pin CPU high-quality sleeved cables. Integrated heatsinks offer 2x more volume because this feature extends the components’ lifespan and 20% lower temperature.    


If you want high power for your high-end RTX 4090 Graphics card, the ASUS Rog Thor power supply is a brilliant choice. With new impressive features, you get the full potential of your system. Therefore, comparing it to the Corsair HX1200, the ASUS Rog is the best choice.


  • It offers great 1200 watts power 
  • Fully modular
  • RGB power with LiveDash Oled Panel
  • 100% Japanese capacitor
  • Wing-blade fan
  • Optimized efficiency


  • Bit Expensive

3- Thermaltake Smart BX1 750W Bronze Power Supply

Thermaltake Smart BX1 750W Bronze Power Supply

If you want to use just medium energy for your RTX 4090 card but not high watts, then the Thermaltake Smart BX1 750 watts is a good option at an affordable price. Are you a budget-conscious user but do not compromise with features? So do not worry! The affordable power supply offers 750 watts of power and comes with fan hydraulic bearings, a Japanese capacitor, and other brilliant features.

First, it offers 80+ Bronze efficiency up to 88%, and in impressive design, gets a powerful single +12V rail that supports today’s GPU’s demand. Such as, 100% Japanese capacitors are used to smooth voltage and block DC, and you will get superb performance and reliability. Due to its capacitor, you can get the greatest durability and high stability for long use without any problem. 

Thanks to its ultra-quiet 120mm hydraulic bearing fans, your system works continuously in heavy loads because of these cooling fans. In addition, RPM controls will help to get superior cooling performance in low-silence operations. For full powering, the system at optimal voltages comes with a soft black sleeve cable design that is amazing for cable installation.

You can use this power supply for a long time without any short-circuit other problems. Because industry-grade protection features protect it from OPP, OVP, and SCP, its Low ripple noise ability over 80mV on +12 and lower 40mV on +5v or +3.3V offers stable operation. Keep your high-end components, like great graphics cards, stable and reliable performance for a long time.    


Suppose we compare the Thermaltake Smart BX1 750W Bronze to the previous version Thermaltake Smart BX1 550 Watts. The Smart BX1 has +200 watts, a fully modular power supply, +2PCIe-6+2 pin connectors, and + SATA connectors.


  • Low ripple noise 
  • Offers 750 watts
  • 120 mm hydraulic fan
  • 100% Japanese capacitor
  • Support 24 pin x1/4+4 and PCIe connector
  • Single +12V rail design
  • Industrial grade protection
  • 5-year warranty


  • Hydraulic bearing 
  • Not RGB lighting

4- Corsair CX750F RGB, 750 Watt Power Supply

Corsair CX750F RGB, 750 Watt Power Supply

Corsair is a famous brand in the market because of its functionality, reliability, and performance. The Corsair CX 750 F RGB 750 watt power supply is fully compatible with the RTX 4090 for high performance. You can get impressive RGB lighting features at a reasonable price, making it an ideal option for normal budget users and an aesthetic look in your system. This high end PSU is also compatible with i7-12700K PSU.

In terms of performance, it offers 750 watts power, which is enough for hungry high-end GPU RTX 4090 and also perfect for cryptocurrency at a reliable and affordable price. In addition, you can get the 80 Plus Bronze certification efficiency and provide up to 88% operational efficiency, reduce heat, and decrease your power costs. 

For RGB lover users, it comes with RGB lighting, a fantastic feature that makes your rig more beautiful and powerful. The 120mm RGB fan with 8 respective addressable RGB LEDs makes brilliant accent lighting for your system build. First, control the lighting you want; click the button on the back side and to Corsair iCUE RGB lighting.

Control and use built-in ARGB on your motherboard and control with the included adapter cable. Cooling in its 120mm, a fan is enough to control temperature and cool the system, and the fully modular cabling feature makes your system more efficient. You use only those cables needed and reduce cable clutter in your system.  


If we compare Corsair CX750F RGB to MSI MPG A750GF Power Supply, both have impressive features, but MSI is expensive compared to Corsair and has no RGB features. So suppose you do not like RGB lighting and want the Gold certification for this MSI is good but expensive. And if you want RGB features and, for you do not matter bronze, Gold certification at an affordable price, then buy the Corsair CX750F RGB. 


  • For reliable power support 105C Japanese capacitor
  • RGB Lighting 120mm fan
  •  5-year warranty
  • Budget-friendly
  • 80 plus certified


  • Noise levels can be disturbing in tough condition
  • The short distance between peripheral connectors 

5- Power Supply 80 Plus Gold Certified Fully Modular PSU

To get the full potential and high performance of your RTX 4090 graphics card, look for the best PSU. The 1000 Watts power supply is equipped with various features that make your rig components more powerful and efficient for impressive performance. Additionally, you can save your electricity bills because of its efficient certification design and impressive features. 

First of all, its fully modular design makes your system unique and helps to generate low heat; it is also good for airflow, and you can use just those cables needed for the system. Moreover, 80 Plus Gold certification up to 90% or higher is good for running pc components under all kinds of stress. They provide continuous power and will maintain 80% efficiency.  

You can also get stable and continuous power output due to APFC+LLC+DC-DC structure ability. Moreover, ATX form factor compact design has a large capacity, and an ultra quiet 120mm fan cools the power supply temperature, increasing the lifespan of your whole system. Moreover, the affordable price offers brilliant features ideal for high-end graphics and processors. 

Heavy duty protection like OVP/OPP/UVP.The ability to SCP/OTP/OCP protects your system from short circuits and suddenly high current flow. It is included in the protection. Plus, it offers an extra 10-year warranty enthusiast, providing stable, efficient power well into the next decade and beyond. 


Power supply compared to EVGA 210-GQ-1000, then the power supply is the best option. One thousand watts power supply comes with a 10-year warranty and a fully modular cable design at an affordable price. On the other hand, EVGA comes with a semi-modular cable design, just a 5-year warranty, and is high in price compared to the Power supply.


  • ATX factor
  • 1000 watts for advanced gaming
  • Full modular cables
  • Several power protections


  • Bit overheat at time

6- SilverStone Technology 1200 Watt Power Supply

SilverStone Technology 1200 Watt Power Supply

SilverStone is a well-known market company that continuously releases unique case designs and performs highly. This company is also active in the power supply unit market; their engineers are very experienced developing advanced PSUs. In addition, SilverStone technology’s 1200 Watts power supply is ATX-compliant, which is fantastic for new generations of power-hungry graphics cards and processors.

For easy integration, it comes with a compact design with a depth of 140mm, and 100% modular cables. Make your system cable management easier, reduce extra clutter cables and increase airflow inside the system chassis. In addition, the 80 PLUS platinum certification makes the system powerful for numerous components and saves energy savings.  

The 140mm fan is enough for system cooling and airflow for system lower temperature. With ATX form factor, the 1400mm fan is brilliant for the unit’s longevity; the system runs fast and operates properly. Along with a single +12V rail, 24/7 gets continuous output power with a 40 C operating temperature. 

In addition, Hybrid ceramic bearings make the system durable and reliable and help save energy and reduce running temperature. The compact design easily fits any small rig dimension of its 5.91 x 3.39 x 5.51 inches. Therefore, it supports the 24-pin ATX PCIes, and fortunately, the distance between the peripherals connectors is ideal.


If we compare Silverstone technology 1200 Watts to Silverstone technology SX1000 platinum, then the main difference between price and watts. Along with Silverstone technology, you can get 1200 Watts, which is 200 more, compared to SX, which is also 100 dollars.


  • Efficient in performance
  • Fully modular
  • Compact design
  • Hybrid ceramic bearings


  • Bit expensive

Required PSU RTX 4090

  • Features Minimum Maximum
  • Watts 750W 850W to 1200W
  • Certification 80 PLUS Gold 80 PLUS Platinum
  • Cables design Fully modular Fully Modular
  • Warranty 5-years 10-years
  • Fans and bearing 120mm with FDB 140mm fan with dual ball bearing
  • Capacitores 100% japanese 100% japanese
  • Form Factor ATX ATX

 GeForce RTX 4090 Vs. Radeon RX 6950 XT

  • The main difference between both graphics cards is the architecture; RTX 4090 comes with Lovelace and Radeon RX 6950 based on RDNA 2 Architecture.
  • Radeon has just 5,120 cores, and the Nvidia flagship has 9% higher, 16,384 cores.
  • The Base clock speed of RTX 4090 is 2,235MHz, and Radeon has just 1,925MHz.
  • RTX 4090 is the greatest in memory 24GB GDDR6X, and Radeon offers 16GB GDDR6x
  • RTX 4090 used 450 watts of thermal power, and Radeon used 332 watts. 
  • The RTX 4090 has 19,000 points, AMD Radeon has 9,850 points, and the RTX is 2x faster than the AMD Radeon 6950 XT.

Best PSU for RTX 4090 Buying Guide

You know the RTX 4090 is the greatest card for multiple heavy applications. However, to get the full potential of this card much power is necessary. So you are looking for the best PSU for RTX 4090; for the perfect PSU, we will tell you about some important features. That helps to select the perfect power supply for the latest graphics and Processors.  

Above mentioned all products are brilliant at running power full processors and graphics cards. So for high-level performance and power, we recommended ASUS Rog Thor 1200 Certified. Therefore, the best choices for budget-conscious users are Corsair CX750F RGB, 750 Watt, and Thermaltake Smart BX1 750W.


The first feature is efficiency, which is important for the longevity of components and saving energy—the different types of certification in power supplies, like Gold, Bronze, and Platinum.

Most users prefer the Gold efficiency power supply, but you will check the 80 PLUS platinum efficiency with higher watts because your high-end graphics card is well and efficient. In addition, the SilverStone Technology 1200 Watt comes with 80 Plus Platinum efficiency.  


Watts depend on you because some users want just 750 watts for a normal task, and some users, like gamers, want greater watts for their hungry system. For the latest high-end GPUs and Processore, 750 to 1200 watts is brilliant to get your system’s full potential. The 1000W Power Supply 80 Plus Gold Certified is also good for hungry components. 

Fully Modular Cables

Suppose you want to avoid unnecessary cables in your system to design the modular cable. Most new power supplies come with fully modular cable management, which is good for airflow and makes the system unique. In this post, all products come with a Fully modular cable design.


The power supply already comes with 120mm to 140mm fans with an impressive blade design for air cooling. That is brilliant for a cooling system, removing extra heat, and PSU runs at optimal temperature. Such also come with fluid dynamic, dual ball bearing, and semi-hybrid bearings, which help system reliability and stability and offer a long lifespan.   

Warranty And Protection

The last but most important point is the warranty; when you buy any power supply, you must check the warranty policy with the company. Most power supplies come with a 5-year warranty range of 10 years. Additionally, for system safety, you look at important electrical protections, like SCP, OCP, UVP, OVP, etc., that protect against leakage of power and other damages to your system. 


Is Power Supply Important For GPUs?

Yes, for a high-end gaming PC and its complex components like a high motherboard, GPU, Processors, and power supply is very important to run up a game and graphically intense application.  

What is 850 Watts Enough For RTX 4090?

Yes, the NVIDIA new flagship high-end card recommended 850 watts power supply. But if you want 1000 or more power for your GPU and latest processors, it is also best to run different applications. 

What Faulty PSU Damage GPU AND Other components?

Yes, a faulty power supply can damage your GPU and other parts, but GPU does not directly damage, but other parts of your PC can damage. A faulty PSU slowly but surely damages your whole PC. 

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