Best PSU for AMD Ryzen 9 7900X and GeForce RTX 4080

The AMD Ryzen 9 7900X and GeForce RTX 4080 are latest best selling CPU and GPU in 2023. The AMD Ryzen 9 7900X is a powerful processor, and coupled with an even more powerful GeForce RTX 4080 GPU, you need a reliable power supply that can deliver adequate wattage to keep everything running smoothly. The Ryzen 9 7900X has a TDP of 170W and the GeForce RTX 4080 has a TGP of 320W, making a total of 490W. That means that you’ll need to find a PSU with at least 750W of power output. To get the most out of your system, we recommend looking for a PSU with a higher wattage rating to give you more headroom for future upgrades.

Now, below are top recommended PSUs for your AMD Ryzen 9 7900X and GeForce RTX 4080 combo:

Corsair RMX Series (2021) RM1000x Fully Modular PSU – Check Price at Amazon/B&H Photo Video/Newegg

The Corsair RMX Series 2021 RM1000x Fully modular PSU is currently best PSU for AMD Ryzen 9 7900X and GeForce RTX 4080 combo. It has a fully modular design that lets you connect only the cables you need, simplifying your cable management and improving your case airflow. It also features a zero RPM fan mode that keeps the fan silent at low and medium loads, and only spins up when needed. It has an 80 PLUS Gold certification, which means it can achieve up to 90% efficiency at 50% load, saving you energy and reducing heat output. It also has a Cybenetics ETA-A rating, which indicates high performance and stability in terms of voltage regulation, ripple suppression and transient response. The RM1000x can handle any load you throw at it, thanks to its powerful single +12V rail that can deliver up to 83.3A of current. The RM1000x is built with premium components, such as Japanese 105°C capacitors that ensure long-term reliability and durability. It also comes with a generous 10-year warranty from Corsair, one of the most reputable brands in the PSU market. The RM1000x has a sleek black design that matches any build aesthetic, and comes with a set of black sleeved cables that look neat and professional.

Corsair RMX Series (2021) RM1000x Fully Modular PSU Features:

• Fully modular, so you only connect the cables that your system needs.
• A 135mm ML fan utilizes a magnetic levitation bearing and custom engineered rotors for high performance, low noise, and superior reliability.
• EPS12V connector for compatibility with modern graphics cards and motherboards.
• 100% Industrial-grade, 105°C rated Japanese capacitors ensure unwavering power and reliability.
• Supports Modern Standby sleep mode for extremely fast wake-from-sleep times and better low-load efficiency.

Pros:	Cons:
High efficiency rating Quality components Modular design for easy cable management Excellent ripple suppression Stable power delivery Good value for the price	Short distance between the peripheral connectors A bit expensive

CORSAIR RMx Series (2021) RM850x 80 PLUS GOLD Full Modular Power Supply – Check Price at Amazon/Newegg

Compared to RM1000x, the CORSAIR RMx Series 2021 RM850x 850W 80 Plus Gold PSU is another best selling PSU on the market with a cheaper price tag. At most condition, this RM850x is enough for Ryzen 9 7900X and RTX 4080 combo. The RM850x 2021 has been updated with some improvements over the previous model. It has better performance, lower ripple, and higher efficiency than the older RM850x, and it can compete with some of the best PSUs in its category. It is an incredibly powerful and efficient power supply that provides reliable, clean power to your PC. This PSU is equipped with advanced features such as a 135mm rifle bearing fan for quiet operation and low temperatures, 100% Japanese 105°C capacitors for excellent performance and reliability, and a fully modular design for easy cable management. It also includes Active Power Factor Correction (PFC) and is 80 Plus Gold rated with up to 90% energy efficiency. The RM850x is perfect for powering multiple GPUs and overclocked CPUs, providing excellent stability and performance while remaining cost-effective. With its robust build quality and high-end components, it’s no wonder why the Corsair RMx Series 2021 RM850x 850W 80 Plus Gold PSU is one of the best choices for any enthusiast or hardcore PC gamer.

CORSAIR RMx Series 2021 RM850x 850W 80 Plus Gold PSU Features:

• Fully modular, so you only connect the cables that your system needs.
• A 135mm ML fan utilizes a magnetic levitation bearing and custom engineered rotors for high performance, low noise, and superior reliability.
• EPS12V connector for compatibility with modern graphics cards and motherboards.
• 100% Industrial-grade, 105°C rated Japanese capacitors ensure unwavering power and reliability.
• Supports Modern Standby sleep mode for extremely fast wake-from-sleep times and better low-load efficiency.
• Zero RPM fan mode for near-silent operation at low to medium loads.
• Resonant LLC topology with DC-to-DC conversion provides clean, consistent power, reduces coil whine for quieter operation, and enables use of more energy efficient sleep states.
• Ten-year warranty for complete peace of mind.

Pros:	Cons:
Delivered full power at 47°C High overall performance Highly efficient at light loads Quiet operation Modular cables Fully compliant with ATX v2.52 Quality fan – low noise with high airflow Loads of cables and connectors Fully modular	High OCP triggering points on the minor rails Needs a small average efficiency boost In cable capacitors Small distance between peripheral connectors

Cooler Master V850 SFX Gold 850W 80 PLUS Gold Modular PSU – Check Price at Amazon/B&H Photo Video/Newegg

The Cooler Master V850 SFX Gold is a compact and powerful power supply unit that delivers 80 Plus Gold efficiency and full-modular cabling, is another great 850W PSU for AMD Ryzen 5 5600X and GeForce RTX 3060. It is designed for small-form-factor builds, but it also comes with an SFX-to-ATX bracket that makes it compatible with larger cases. It has a 92mm fluid dynamic bearing fan that operates quietly and a 10-year warranty that ensures reliability. It can handle demanding systems with high-end components, such as multiple GPUs and overclocked CPUs. It has 100% Japanese capacitors and 16AWG PCIe high-efficiency cables that ensure stability and durability. It also has a zero RPM fan mode that only activates the fan when needed. Overall, the V850 SFX Gold is a great option for anyone looking for a small and powerful PSU that can support a variety of systems. It has some minor drawbacks, but they are overshadowed by its many strengths. It is a well-made and well-performing product from Cooler Master.

Cooler Master V850 SFX Gold 850W 80 PLUS Gold Modular PSU Features:

• SFX Form Factor: High-quality PSU that’s compatible with all SFX cases and suitable for mini-ITX system builds.
• SFX-to-ATX Bracket: With the included bracket, users can install the V SFX Gold securely to an ATX case.
• 16 AWG PCI-e Cables: The thicker 16 AWG PCI-e cables allow for higher currents, thereby improving both efficiency and safety.
• Full-Modular Cabling: Modular cables reduce clutter, increase airflow, and improve overall efficiency and thermal performance.

Pros:

Cons:

Compact and powerful, with 850W output in a SFX form factor 80 Plus Gold efficiency and full-modular cabling Quiet and reliable, with a 92mm fluid dynamic bearing fan and a 10-year warranty Compatible with various cases, with an included SFX-to-ATX bracket High-quality components, with 100% Japanese capacitors and 16AWG PCIe high-efficiency cables Zero RPM fan mode, which only activates the fan when needed

Expensive, compared to some of its rivals High inrush current, which might cause issues with some power grids or breakers Short distance between the modular connectors and the fan, which might affect the airflow and the cable management

Corsair SF Series SF750 750W 80 PLUS Platinum Modular PSU – Check Price at Amazon/B&H Photo Video/Newegg

If you are looking for a 750W PSU, the Corsair SF Series SF750 750W 80 PLUS Platinum Modular PSU is currently best PSU choice for Ryzen 5 5600X and RTX 3060 combo. It delivers 80 Plus Platinum efficiency and 750W of output in a compact SFX form factor. It is ideal for small-form-factor builds that require high performance and reliability. It has a 92mm rifle bearing fan that operates quietly and a 7-year warranty that ensures durability. It is capable of supporting a very strong system with power-hungry components, such as multiple GPUs and overclocked CPUs. It has 100% Japanese capacitors and 16AWG PCIe high-quality cables that ensure stability and longevity. It also has a zero RPM fan mode that only activates the fan when needed. Overall, the SF750 is a great option for anyone looking for a small and powerful PSU that can support a variety of systems. It has some minor drawbacks, but they are overshadowed by its many strengths. It is a well-made and well-performing product from Corsair.

Corsair SF Series SF750 750W 80 PLUS Platinum Modular PSU Features:

• 750W Single +12V Rail
• 92mm Cooling Fan
• Intel ATX12V Version 2.4
• 4 x PCIe Connectors
• 8 x SATA Connectors
• 3 4-Pin Connectors
• Individually Sleeved Cables
• SFX-to-ATX Adapter Included
• Supports Multiple GPUs
• Zero RPM Mode

Pros:	Cons:
80 PLUS Platinum Extremely high power density Resiliently high operating temperatures Tight load regulation High overall performance Fully modular 2x EPS & 4x PCIe Ripple suppression is first class Great build quality 105c rated capacitors throughout	Expensive Cables are intentionally quite short

EVGA Super Nova 850 G5 80 Plus Gold Fully Modular PSU – Check Price at Amazon/Newegg

 

The EVGA SuperNOVA 850 G5 is a reliable and powerful power supply unit that can handle high-end gaming systems and overclocking, a great PSU for AMD Ryzen 9 7900X and GeForce RTX 4080 PC build. It has a sleek and compact design, with a black and gold color scheme and a fully modular cable management. It also has a long warranty and a self-test feature for peace of mind. It is equipped with an advanced cooling system that operates quietly at low fan speeds, even under full load. The fully modular cable design allows you to customize your cable routing, ensuring that the cables are neatly organized. The 80 Plus Gold certified efficiency ensures a good balance between performance, heat output, and electricity costs. Overall, the EVGA SuperNOVA 850 G5 is one of the best power supplies on the market, offering excellent performance and reliability.

EVGA Super Nova 850 G5 80 Plus Gold Fully Modular PSU Features:

• 80 plus Gold certified, with 91% efficiency or higher under typical loads
• Fully modular to reduce clutter and improve airflow
• 100% Japanese capacitors, active clamp +DC-DC converter design to improve 3.3V./ 5V. Stability
• Fluid Dynamic Bearing fan and EVGA eco mode for ultra-quiet operation and increased lifespan
• 10 year limited Warranty and unparalleled EVGA Customer Support

Pros:

Cons:

Fully modular design, with sleeved cables and a single 12V rail 80 Plus Gold certified, with 90% efficiency or higher under typical loads Compact 150mm size, with a black and gold color scheme Fluid dynamic bearing fan, with an eco mode for silent operation Power on self tester, for easy troubleshooting 10-year warranty, and good customer support Good build quality, and tight load regulation at 12V

High inrush current, which may cause problems with some circuits Noisy fan profile, especially at high loads and temperatures Lower efficiency than some of its competitors, such as the Corsair RM850x and the Seasonic Focus Plus Gold 850W Not compatible with some cases and motherboards, due to the 150mm length More expensive than some of its rivals, such as the Corsair RM850x and the Seasonic Focus Plus Gold 850W