Best Power Supply for 4090: Top Picks

Jaden Kelly
11 min readDec 6, 2023

High-end graphics cards like the RTX 4090 require high-performance power supplies. Overheating, power fluctuations, and poor performance may occur without the right power supply. As such, choosing the best power supply for 4090 is essential.

I have selected six reliable, efficient, and noise-free power supplies for powering up your high-end system. Choosing the right RTX 4090 model for your needs will ensure that you have the necessary power and support to run it at its best.

The following blog post offers valuable information on the top six power supplies best suited for powering up your RTX 4090. To ensure that you choose the best power supply, I analyzed the features and capabilities of each power supply.

Best Power Supply for 4090

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The Best Power Supply for RTX 4090: Top Recommendations

According to my findings, the following are my top picks:

The MSI MPG A850G PCIE 5 & ATX 3.0 Gaming Power Supply offers reliable performance and compatibility.

The ASUS ROG STRIX 1000W Gold PSU delivers impressive power efficiency.

If you’re looking for a low-noise option, the Corsair RM1000e Fully Modular Power Supply is a solid choice.

For those seeking modularity and efficiency, the EVGA SuperNOVA 1000 G5 Fully Modular PSU is worth considering.

Lastly, the Thermaltake Toughpower GF A3 1200W PSU offers a powerful solution for your RTX 4090.

1) MSI MPG A850G PCIE 5 & ATX 3.0 Gaming Power Supply

MSI MPG A850G PCIE 5 & ATX 3.0 Gaming Power Supply for RTX 4090

The MSI MPG A850G PCIE 5 & ATX 3.0 Gaming Power Supply is an exceptional choice for powering your RTX 4090 with its reliable performance and top-notch build quality.

With its 80 Plus Gold certification, this power supply ensures efficient power delivery, reducing energy waste and heat generation. Even under heavy gaming loads, the MSI MPG A850G remains silent, allowing you to focus on your gameplay without any distracting noise.

The fully modular design of this power supply enhances cable management and airflow, resulting in a cleaner and cooler system. With its ample power capacity of 850W, it can easily handle the power requirements of high-end components, including the RTX 4090.

Additionally, the stylish aesthetics and top-notch build quality of the MSI MPG A850G add a touch of sophistication to your gaming setup.

Features:

- Reliable power delivery with 80 Plus Gold certification

- Silent operation even under heavy gaming loads

- Full modular design for improved cable management and airflow

- Ample power capacity of 850W for high-end components

- Stylish aesthetics and top-notch build quality

- PCIe 5 support and ATX 3.0 compliance for future technology

Check here for more details about MSI MPG A850G PCIE 5 & ATX 3.0 Gaming Power Supply.

2) ASUS ROG STRIX 1000W Gold PSU

ASUS ROG STRIX 1000W Gold PSU for RTX 4090

You cannot go wrong with the ASUS ROG STRIX 1000W Gold PSU when it comes to choosing the best power supply for your RTX 4090. This power supply is designed to deliver reliable and efficient power to your high-end graphics card, ensuring optimal performance and stability.

With its ROG heatsinks and axial-tech fan design, this PSU effectively dissipates heat and maintains low noise levels. The dual ball fan bearings extend the lifespan of the fan, while the 0dB Technology ensures quiet operation during low load situations.

The 80 Plus Gold Certification guarantees energy efficiency, reducing power consumption and saving you money in the long run. Additionally, the fully modular cables allow for a neat and tidy setup, improving airflow within your system.

Trust in the ASUS ROG STRIX 1000W Gold PSU to meet the power demands of your RTX 4090.

Features:

- ROG heatsinks for lower temperatures and reduced noise

- Axial-tech fan design for increased air pressure

- Dual ball fan bearings for longer lifespan

- 0dB Technology for silent operation

- 80 Plus Gold Certification for energy efficiency

- Fully modular cables for neat and tidy setup

Check here for more details about ASUS ROG STRIX 1000W Gold PSU.

3) Corsair RM1000e Fully Modular Low-Noise Power Supply

Corsair RM1000e Fully Modular Low-Noise Power Supply for RTX 4090

Get the Corsair RM1000e (2023) Fully Modular Low-Noise Power Supply for your RTX 4090 and experience reliable and efficient power delivery.

This power supply is designed to meet the demanding power requirements of high-performance graphics cards like the RTX 4090. With its ATX 3.0 and PCIe 5.0 compliance, it ensures compatibility with the latest hardware platforms.

The RM1000e features a fully modular design, allowing for easy cable management and customization. It’s equipped with a 120mm rifle bearing fan that operates quietly, even under heavy loads.

The industrial-grade 105°C-rated capacitors provide reliable power delivery and longevity. Additionally, the RM1000e is Modern Standby compatible, enabling fast wake-from-sleep times. Its 140mm-long casing ensures compatibility with modern cases.

Features:

- Fully modular design for easy cable management

- Quiet operation with a 120mm rifle bearing fan

- Industrial-grade 105°C-rated capacitors for reliable power

- Modern Standby compatible for fast wake-from-sleep times

- Suitable for various PC hardware configurations

- 140mm-long casing for compatibility with modern cases

Check here for more details about Corsair RM1000e Fully Modular Low-Noise Power Supply.

4) EVGA SuperNOVA 1000 G5 Fully Modular PSU

EVGA SuperNOVA 1000 G5 Fully Modular PSU for RTX 4090

Choose the EVGA SuperNOVA 1000 G5 fully modular PSU for your RTX 4090 and enjoy its exceptional power delivery. With its 80 Plus Gold certification and 91% efficiency under typical loads, this power supply ensures reduced power consumption and stable power delivery.

The fully modular design reduces clutter and improves airflow, making cable management and installation hassle-free. The 100% Japanese capacitors and active clamp DC to DC converter design enhance stability for the 3.3V and 5V rails.

The Fluid Dynamic Bearing fan and EVGA eco mode provide ultra-quiet operation and increased lifespan.

Pros:

- Exceptional power delivery

- Reduced power consumption

- Clean and organized build

- Quiet operation

- Reliable and durable construction

Cons:

- May be overkill for lower power systems

Check here for more details about EVGA SuperNOVA 1000 G5 Fully Modular PSU.

5) Thermaltake Toughpower GF A3 1200W PSU

Thermaltake Toughpower GF A3 1200W PSU for RTX 4090

When selecting the best power supply for your RTX 4090, consider the high-performance Thermaltake Toughpower GF A3 1200W PSU. This power supply is 80 Plus Gold certified and fully compatible with Intel ATX 3.0 standards, ensuring efficient power delivery to your high-end graphics card.

With its PCIe Gen 5.0 readiness, the Toughpower GF A3 is designed to meet the demands of the latest graphics cards, including the RTX 4090. It features a high amperage single +12V rail and incorporates high-class technologies for stable and reliable power output.

The fully modular low-profile flat cables make cable management a breeze, allowing for a clean and organized build. With positive reviews highlighting its performance and ease of installation, the Thermaltake Toughpower GF A3 1200W PSU is a top choice for powering your RTX 4090.

Pros:

- Efficient power delivery

- Stable and reliable performance

- Easy installation with modular cables

- Suitable for the latest graphics cards

- Trustworthy brand reputation

- Ample power for future upgrades

Cons:

- Red PCIe cable connectors may not be to everyone’s liking

Check here for more details about Thermaltake Toughpower GF A3 1200W PSU.

6) NZXT C1200 1200 Watt Gaming PC Power Supply

NZXT C1200 1200 Watt Gaming PC Power Supply for RTX 4090

The NZXT C1200 1200 Watt Gaming PC Power Supply for RTX 4090 offers reliable power delivery and efficient performance. With its 1200-watt capacity, it’s designed to handle the power demands of high-end gaming PCs, including the RTX 4090 graphics card.

The power supply features an ATX 3.0 form factor and a PCIe 5.0 12VHPWR connector, ensuring compatibility with the latest hardware.

One of the standout features of the NZXT C1200 is its 80 Plus Gold efficiency rating, guaranteeing over 90% efficiency at 50% load. This not only reduces energy usage and lowers monthly costs but also extends the lifespan of your PC.

The power supply also boasts a silent operation, thanks to its 135mm PWM fan and Zero Fan Mode, which activates when the load is below 40%. This ensures a quiet computing experience, even during intense gaming sessions.

In terms of build quality, the NZXT C1200 is constructed with all Japanese 105°C-rated capacitors, ensuring performance, reliability, and longevity. The PSU is fully modular, making cable management a breeze.

Its short chassis length and well-labeled cables further enhance ease of installation. Additionally, the power supply comes with a 10-year warranty, providing peace of mind for long-term usage.

Pros:

- Reliable power delivery

- Efficient performance

- Silent operation with PWM fan and Zero Fan Mode

- High-quality construction with Japanese capacitors

- Easy installation with fully modular design

- Short chassis length and well-labeled cables

Cons:

- Minor issues with connector configuration and SATA cables

Check here for more details about NZXT C1200 1200 Watt Gaming PC Power Supply.

Considerations When Buying The Best RTX 4090 Power Supplies

For an RTX 4090 GPU, it is essential that several factors are taken into consideration when choosing a power supply.

Power Wattage Requirements

To determine the appropriate power wattage for your RTX 4090, consider factors such as its power consumption and the requirements of other components.

The power consumption of different RTX 4090 models can vary, so it’s crucial to know the specific requirements of your graphics card. Recommended PSU wattages for RTX 4090 range from 320W to 850W or more, depending on the model. However, it’s generally recommended to use a PSU between 1000W and 1200W.

Despite heavy gaming loads, the power usage of the RTX 4090 rarely exceeds 700W. Nevertheless, it’s essential to consider the power requirements of other components such as HDDs, fans, and lighting. These additional components can contribute to the overall power consumption of your system, so make sure to factor them in when choosing your power supply.

Efficiency Rating Importance

When purchasing the best power supply for your RTX 4090, it’s important to consider the efficiency rating and factors that contribute to it. The efficiency rating of a power supply indicates how effectively it converts AC power from the wall outlet into DC power that your components can use.

Here are three factors to consider when evaluating the efficiency rating of a power supply:

  • Efficiency Certifications: Look for power supplies that have certifications like 80 Plus Platinum or Gold. These certifications ensure that the PSU meets specific efficiency standards and can minimize power wastage.
  • Energy Savings: A high-efficiency power supply can save energy and reduce electricity bills. By minimizing power wastage, it ensures that more of the electricity drawn from the wall outlet is being used by your components.
  • Environmental Impact: Choosing a power supply with a high efficiency rating also has a positive environmental impact. It reduces the overall carbon footprint by consuming less energy and minimizing the need for additional power generation.

Compatibility With Components

To ensure compatibility with the components of your RTX 4090, it’s important to consider certain factors when selecting the best power supply.

Firstly, you need to ensure that the power supply is ATX 3.0 compliant. This means that it should support the new Intel standards ATX v3.0 and have a 12+4 pin connector for add-in cards. This ensures that the power supply can provide the necessary power to your RTX 4090 and other components.

Additionally, you should also pay attention to the connector requirements. It’s crucial to ensure proper and secure connections, especially if you’re using adapter cables. This will prevent any potential issues or damage to your components.

Modular Vs. Non-Modular

Consider the benefits of modular and non-modular power supplies when selecting the best option for your RTX 4090.

The choice between modular and non-modular power supplies can have a significant impact on cable management and airflow within your system. Here are three factors to consider:

  • Cable Management: Modular power supplies offer better cable management due to their detachable cables. This allows you to connect only the cables you need, reducing cable clutter and improving airflow. With non-modular power supplies, you’re stuck with all the cables, even if you don’t use them all.
  • Airflow: Modular power supplies can help enhance airflow within your system. By reducing cable clutter, they allow for better airflow, resulting in lower temperatures and improved overall system performance. Non-modular power supplies, on the other hand, may obstruct airflow due to the excess cables.
  • Ease of Installation: Modular power supplies are generally easier to install since you can connect the necessary cables and leave out the rest. This simplifies the installation process and makes it more efficient. Non-modular power supplies require more careful cable management during installation, which can be time-consuming and tedious.

Overheating Prevention Features

Are you wondering how to ensure optimal heat management for your RTX 4090? When it comes to selecting the best power supply for your graphics card, it’s crucial to consider the overheating prevention features.

To help you make an informed decision, here are three key factors to consider:

  • Efficient Cooling Design: Look for power supplies with a well-designed cooling system that includes features like large fans, heat pipes, and mesh grills. These elements help in dissipating heat effectively and maintaining low temperatures.
  • Temperature Monitoring: Opt for a power supply that offers temperature monitoring capabilities. This feature allows you to keep track of the PSU’s temperature and take necessary precautions if it exceeds safe limits.
  • Overload Protection: Choose a power supply that comes with overload protection mechanisms. These safeguards prevent the PSU from overheating and potentially damaging your components in case of excessive power draw.

Noise Level Considerations

To ensure a quiet computing environment, it’s important to select a power supply with a low noise operation for your RTX 4090. When considering noise level in a power supply, there are several factors to keep in mind.

Firstly, the fan type and size play a significant role. Opting for a power supply with larger fans can help reduce noise as they can move the same amount of air at lower RPMs, resulting in quieter operation.

Additionally, the quality of the fan bearings is crucial. Power supplies with high-quality bearings produce less noise and tend to last longer.

Another factor to consider is the efficiency rating of the power supply. Higher efficiency power supplies generate less heat, which leads to lower fan speeds and consequently, reduced noise.

Lastly, modular power supplies can help minimize clutter and improve airflow, resulting in quieter operation.

Anchor Your RTX 4090: Top Power Supplies Reviewed

Finding the best power supply for your RTX 4090 is crucial to ensure that your high-end graphics card performs at its best.

After evaluating different power supplies, I have narrowed down the top six picks based on factors such as wattage, efficiency, and reliability.

Think of the power supply as an anchor for your powerful ship, ensuring stability and a smooth sailing experience. It is important to choose wisely and provide the necessary power and support for your RTX 4090 to reach its full potential. By doing so, you can guarantee optimal performance and a seamless user experience.

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Jaden Kelly

Jaden is driven by a passion to provide assistance to others in navigating a complex world of technology. His work shows this passion.