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Best PSU for RTX 4070 in 2024 – Our top picks

Ensure your 4070 is keep powered and secure with one of these PSUs picked solely for the card

Reviewed By: Kevin Pocock

Last Updated on May 10, 2024
Best PSU for RTX 4070
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The Nvidia RTX 4070 has taken the gaming world by storm with its impressive performance, and finding the best PSUs for the RTX 4070 is crucial for ensuring your build runs smoothly and efficiently. What sets the RTX 4070 apart from other GPUs in the 40-series is its surprisingly low power requirement, with a recommended PSU wattage of just 600W. This is fantastic news for gamers who want top-tier performance without having to invest in a high-wattage power supply unit.

In this article, we will guide you through the process of selecting the best PSU for your RTX 4070 build, taking into account the efficiency, reliability, and overall value. With the right power supply, you’ll be able to harness the full potential of your RTX 4070 and enjoy an incredible gaming experience. So, let’s dive in and explore the top options available for powering this game-changing GPU.

How we selected the best PSU for RTX 4070

In our quest to find the best PSUs for the RTX 4070, we meticulously researched and analyzed various factors to ensure we chose reliable and efficient power supplies that cater to the needs of a wide range of users. Here’s a breakdown of the criteria we used to make our selections:

  • Wattage and Efficiency: We prioritized power supplies with a wattage rating of at least 600W to meet the recommended requirements for the RTX 4070. Additionally, we focused on PSUs with high-efficiency ratings, ensuring a minimum of 80 PLUS Bronze certifications to provide both energy savings and less heat generation.
  • Form Factor and Compatibility: We included PSUs with different form factors to accommodate various PC case sizes and builds. From standard ATX to compact SFX, our selections cater to a range of users and their unique requirements.
  • Cable Management: We took into account the different cable management options available, including fully modular, semi-modular, and non-modular designs. This allowed us to cater to different preferences and budgets, while also ensuring ease of installation and improved airflow.
  • Build Quality and Reliability: We selected PSUs from reputable brands with a proven track record of producing high-quality, reliable power supplies. This helped ensure that our recommendations can withstand the demands of a gaming system with an RTX 4070.
  • Corsair SF850L fan, source PCGuide
  • Corsair SF850L logo side, source PCGuide
  • Corsair SF850L logo profile, source PCGuide
  • Corsair SF850L back side logo, source PCGuide
  • Corsair SF850L info label, source PCGuide
  • Corsair SF850L cable connectors side, source PCGuide
Best in ClassExcellent
4.5 /5
Editor’s Rating
How We Review
  • Wattage: 850W
  • Form Factor: SFX-L
  • Rating: 80 Plus Gold, Cybenetics Platinum
  • Design: Fully modular
Reasons to Buy
  • Ideal for SFF builds, compact SFX-L form factor fits perfectly in small cases.
  • 850W offers ample power for RTX 4070, overclocking, and future upgrades.
  • 80 Plus Gold certification reduces noise


Reasons to Avoid
  • Generally more expensive than standard ATX PSUs.
  • SFX-L PSUs might be harder to find.
  • Managing modular cables can add complexity during installation.

So, why is the Corsair SF850L the best PSU for the RTX 4070? Well, it boasts a whopping 850W capacity. This far exceeds the recommended minimum of 550W for the RTX 4070 ,providing significant headroom. This means a stable operation during demanding gaming sessions and overclocking. The extra wattage also leaves ample space for powerful CPUs and future upgrades, making your system more future-proof. Additionally, the Corsair SF850L is 80 Plus Gold certified, guaranteeing at least 87% efficiency at 50% load. This translates to lower power consumption.

Beyond raw power, the SF850L is ideal for SFF builds due to its compact SFX-L form factor. This allows you to cram high-performance components into a smaller case, creating a sleek and space-saving PC. Furthermore, the SF850L is fully modular, meaning you only connect the cables your system needs, minimizing clutter and improving airflow within the tight confines of an SFF case.

What users say

Reviews on Amazon for the Corsair SF850L paint a positive picture, with many users impressed by its quiet operation, particularly at low loads thanks to the zero RPM fan mode. The compact SFX-L size is a hit for builders crafting small form factor PCs, and reviewers generally praise the build quality, performance, and clean power delivery.

  • Corsair CX750 and box, source PCGuide
  • Corsair CX750 box contents, source PCGuide
  • Corsair CX750 box profile, source PCGuide
  • Corsair CX750 box, source PCGuide
  • Corsair CX750 connector end, source PCGuide
  • Corsair CX750 connectors, source PCGuide
  • Corsair CX750 fan side, source PCGuide
  • Corsair CX750 info sticker, source PCGuide
  • Corsair CX750 inside PC, source PCGuide
  • Corsair CX750 logo side, source PCGuide
  • Corsair CX750 on top of box, source PCGuide
  • Corsair CX750 plug side, source PCGuide
Highly Recommended
4 /5
Editor’s Rating
How We Review
  • Wattage: 750W
  • Form Factor: ATX
  • Rating: 80 Plus Bronze, Cybenetics Silver
  • Design: Non-modular
Reasons to Buy
  • Budget-friendly option
  • Meets minimum requirements for RTX 4070 with headroom
  • Wide compatibility with ATX cases and motherboards
Reasons to Avoid
  • Lower efficiency (likely 80 Plus Bronze) means higher electricity usage
  • Limited headroom for future high-end upgrades or overclocking
  • Potentially noisy operation under heavy loads

The Corsair CX750 can be a tempting option for budget-minded builders looking to power an RTX 4070. It meets Nvidia’s minimum recommendation of 550W, providing a buffer for other system components. The CX750 is also generally more affordable than higher-end PSUs, making it attractive for price-conscious users.

However, it’s important to weigh these advantages against some drawbacks. The CX750 typically carries an 80 Plus Bronze certification, which means it’s less efficient than its Gold or Platinum counterparts. This translates to higher power consumption and potentially higher electricity bills in the long run. Additionally, the CX series prioritizes affordability over features. You might experience some fan noise under heavy loads, and the overall build quality may not be as robust as some higher-end PSUs. U

Ultimately, the Corsair CX750 can be a suitable choice for an RTX 4070 build if budget is the top priority. But for users who value quiet operation, longevity, and lower energy costs, investing in a higher wattage PSU with a better efficiency rating might be a wiser decision.

What users say

Corsair CX750 reviews on Amazon showcase a solid budget pick for PC gamers. Customers appreciate its attractive price point, making it a great value choice. The CX750 meets the minimum power requirements for running an RTX 4070 and offers some extra wattage for other components. Plus, users find installation to be a breeze. One user noted “It’s a solid choice for building a powerful, yet tidy PC setup”.

  • Corsair RM750x info sticker, Image by PCGuide
  • Corsair RM750x inside PC, Image by PCGuide
  • Corsair RM750x on top of box, Image by PCGuide
  • Corsair RM750x power connectors, Image by PCGuide
  • Corsair RM750x side, Image by PCGuide
  • Corsair RM750x box contents, Image by PCGuide
  • Corsair RM750x box profile, Image by PCGuide
  • Corsair RM750x box, Image by PCGuide
  • Corsair RM750x fan, Image by PCGuide
  • Corsair RM750x in front of box, Image by PCGuide
  • Corsair RM750x back power input, Image by PCGuide
  • Corsair RM750x end profile, Image by PCGuide
5 /5
Editor’s Rating
How We Review
  • Wattage: 750W
  • Form Factor: ATX
  • Rating: 80 PLUS Gold, Cybenetics Gold
  • Design: Fully Modular
Reasons to Buy
  • Fully modular design
  • 80 PLUS Gold efficiency
  • Reliable performance
  • 10-year warranty
Reasons to Avoid
  • Slightly more expensive than some competitors

The Corsair RM750x 80 PLUS Gold is an outstanding choice for powering your RTX 4070 gaming system. With 750W of power, this fully modular PSU offers ample wattage to handle not just the GPU but also other components in your build, allowing for potential upgrades in the future.

As an 80 PLUS Gold certified unit, the RM750x delivers excellent efficiency, ensuring that your system runs cooler and quieter, while also saving on your electricity bill. The Zero RPM fan mode is another feature that contributes to a quiet operation, as the fan only spins when it’s needed.

The fully modular design allows for easy cable management, as you only need to use the cables that are necessary for your specific build. This helps in creating a clean and organized look inside your PC case, improving airflow and aesthetics. Corsair is a well-known brand in the PSU market, and the RM750x comes with a 10-year warranty, giving you peace of mind in the long-term reliability and performance of this power supply. The build quality and use of premium components make this unit a top choice for powering your RTX 4070 and the rest of your gaming rig.

What users say

According to Amazon reviews for the Corsair RM750x 80 PLUS Gold highlight its well-rounded performance and features. Customers praise its quiet operation, particularly at low loads, thanks to a smart fan design. The build quality is another strong point,with reviewers impressed by its overall durability. Performance is consistent, delivering clean and stable power for various PC configurations. With a 5 star rating from 88% of users, this one is certainly an excellent pick.

  • Wattage: 850W
  • Form Factor: ATX
  • Rating: 80 PLUS Platinum
  • Design: Semi-Modular
Reasons to Buy
  • 850W for future upgrades
  • 80 PLUS Platinum efficiency
  • Fully modular
Reasons to Avoid
  • Expensive
  • High wattage may not be necessary for some users

The Seasonic FOCUS PX-850 80 PLUS Platinum PSU is a top choice for those seeking high-power performance for their RTX 4070 gaming system. With an impressive 850W output and 80 PLUS Platinum efficiency, this power supply delivers exceptional power stability, energy efficiency, and lower operating temperatures, making it perfect for demanding gaming setups and overclocking enthusiasts.

Seasonic has built a strong reputation for producing high-quality power supplies, and the FOCUS PX-850 is no exception. Its fully modular design allows for easy cable management and cleaner builds, reducing clutter within the case and improving airflow. The power supply also features tight voltage regulation, ensuring that your components receive consistent power delivery for optimal performance.

The FOCUS PX-850 comes equipped with a 120mm fluid dynamic bearing (FDB) fan, which provides quiet and efficient cooling. The fan’s Hybrid Mode allows for zero RPM operation during low to medium loads, ensuring silent operation when you need it most. Additionally, the power supply’s robust build quality and premium components contribute to its long-lasting durability, backed by a 10-year warranty for peace of mind.

What users say

The FOCUS PX-850 has been a great pick for many customers, based off Amazon reviews. With 87% of customers providing 5 star reviews, this product take the cake when it comes to high power for mid-range GPUs. One user even called it a “Stable, well-built power supply”.

  • Wattage: 650W
  • Form Factor: ATX
  • Rating: 80 PLUS Gold
  • Design: Fully Modular
Reasons to Buy
  • SFX form factor for small builds
  • Fully modular
  • Great performance
Reasons to Avoid
  • Higher price than some comparable ATX PSUs
  • 650W may limit future upgrades

The SilverStone SX650-G 80 PLUS Gold PSU is the ideal choice for those looking to power their RTX 4070 in a compact or small form factor gaming system. Delivering 650W of power with an 80 PLUS Gold efficiency rating, this power supply provides reliable, stable power while maintaining energy efficiency, keeping your system running smoothly and minimizing energy costs.

SilverStone has long been recognized for producing quality power supplies that cater to various user needs, and the SX650-G is no exception. Its SFX form factor makes it perfect for mini-ITX and other small form factor builds, providing ample power for your RTX 4070 without taking up much space. The fully modular design also allows for easier cable management and clutter-free installation, making it a breeze to create a clean and organized build.

The SX650-G features a 92mm fluid dynamic bearing (FDB) fan, which delivers effective and quiet cooling, ensuring the power supply remains cool even under heavy loads. The fan’s intelligent operation adjusts its speed according to the system’s power demand, offering the right balance between cooling performance and noise reduction.

Built with high-quality components, the SilverStone SX650-G 80 PLUS Gold PSU is designed to withstand the test of time, providing consistent and reliable power to your RTX 4070 gaming system. Its compact form factor, excellent performance, and efficient operation make it a fantastic choice for small form factor builds and those looking to save space without compromising on power.

  • Wattage: 600W
  • Form Factor: ATX
  • Rating: 80 PLUS Certified
  • Design: Semi-Modular
Reasons to Buy
  • Affordable
  • 600W capacity suitable for RTX 4070
  • Reliable brand, 3-year warranty
Reasons to Avoid
  • 80 PLUS White efficiency
  • Non-modular design

The EVGA 600 W1 80 PLUS White PSU is a great budget option for powering your RTX 4070 gaming system. With 600W of power, it provides the recommended wattage for the GPU and can support the rest of your components without breaking the bank.

Although it’s not as efficient as higher-tier 80 PLUS certified units, the 80 PLUS White certification still ensures decent efficiency and stable power delivery. This means that the EVGA 600 W1 will perform reliably in most gaming systems, without causing excessive heat or noise.

This power supply is non-modular, which means that all cables are permanently attached to the unit. While this might make cable management slightly more challenging, it shouldn’t be a deal-breaker for budget-conscious builders who prioritize performance and affordability over aesthetics.

EVGA is a reputable brand in the power supply market, and the 600 W1 comes with a 3-year warranty. This gives you confidence in the quality and long-term reliability of the unit, despite its budget price point.

What users say

Let’s take a look at some Amazon reviews for this product. While the EVGA 600 W1 80 Plus White might be a wallet-friendly choice for mid-tier PC builds on Amazon, keep in mind it has some trade-offs. The affordability is a clear draw, installation seems relatively straightforward based on reviews, but some users mention the fan kicking in and becoming noticeable during demanding tasks. Additionally, the 80 Plus White certification hints at a lower efficiency rating, which could translate to slightly higher electricity bills in the long run compared to PSUs with better ratings. Make sure to bare this mind before purchasing.

Considerations for the best RTX 4070

When selecting one of the best PSUs for your RTX 4070, there are several factors to consider. Each of these aspects plays a crucial role in ensuring you have a stable and efficient system that can handle the demands of the GPU and other components in your build.

First and foremost, consider the wattage of the PSU. Although the recommended wattage for the RTX 4070 is 600W, it’s a good idea to leave some headroom for future upgrades, overclocking, or other power-hungry components. A PSU with slightly higher wattage can provide extra peace of mind and ensure your system remains stable even under heavy loads.

Efficiency is another important factor to consider. PSUs with higher efficiency ratings not only save you money on electricity but also generate less heat, which can help keep your overall system temperatures in check. Look for PSUs with an 80 PLUS certification, which guarantees a minimum efficiency of 80% under various loads. The higher the certification level (Bronze, Silver, Gold, Platinum, or Titanium), the more efficient the PSU.

Next, consider the form factor and dimensions of the PSU, as this will determine whether it fits in your PC case. The most common form factor is ATX, but there are smaller options like SFX or SFX-L for compact builds. Make sure you choose a PSU that will fit comfortably in your case and leave enough room for proper cable management.

Cable management is another crucial aspect to consider when selecting a PSU. Modular PSUs allow you to only connect the cables you need, reducing clutter and improving airflow within your case. Semi-modular and non-modular PSUs are typically more budget-friendly but can be more challenging to manage due to the fixed cables.

Ryan Epps is a copywriter and content manager for PCGuide. He loves researching the newest PC components and watching underrated anime from the 90s.