Best PSU for AMD Ryzen 9 5900X

Investing in a good power supply will last you several builds. You should spend a little more on a quality power supply. Do not worry too much about going over the top because high-capacity power supplies were less efficient a few years ago, but this isn’t true today.

Any power supply rated as Gold or higher won’t have low efficiency at light loads, regardless of capacity. Today we will discuss the 7 Best PSUs For AMD Ryzen 9 5900X. AMD Ryzen 9 5900X is a great CPU, but you need a robust power supply. Knowing a few things about it is the best way to determine what PSU is best for your build. The first step is to decide whether you want a modular or nonmodular power supply. In a nonmodular PSU, all cables are attached, and you cannot disconnect any of them, while in a modular PSU, the cables can be attached (or detached) as needed.

Most people want the best power supply for Ryzen 9 5900X. You may not even know where to start regarding power supplies, mainly if you have never dealt with them before. Throughout the course of this year, we have tested hundreds of power supplies, and we have hand-picked our favorites based on the type of builds they are suitable for. You must select the right power supply unit (PSU) to build a high-end gaming computer capable of running high-end games.

The market is flooded with a variety of options to choose from. If you are not sure which one to get, this article will help you decide which one you should purchase. Here we will discuss what factors you should consider when buying a power supply for AMD Ryzen 9 5900X in this article.

Our Top 3 Recommendations

Best Pick Corsair AX1000 PSU Corsair AX1000 PSU

Fully modular

Sleeved cables

Selectable semi-passive mode

Most Popular Thermaltake Toughpower PF1 Thermaltake Toughpower PF1

80+ Platinum Efficiency

Smart Zero Fan Feature

Quiet Fan

Budget Pick Corsair RM750X Corsair RM750X

Excellent voltage regulation

Fully modular 2x EPS

4x PCIe connectors

Best PSU for AMD Ryzen 9 5900X Summary

Award Image Model Price
Best PSU for AMD Ryzen 5900X Corsair AX1000 PSU Corsair AX1000 PSU See On Amazon
Best PSU for AMD Ryzen 5900X Thermaltake Toughpower PF1 Thermaltake Toughpower PF1 See On Amazon
Best PSU For AMD Corsair RM750X Corsair RM750X See On Amazon
Budget PSU for AMD Ryzen 5900X XPG Core Reactor 650W XPG Core Reactor 650W See On Amazon
Best PSU for Gaming Fractal Design Ion SFX 650W Gold Fractal Design Ion SFX 650W Gold See On Amazon
Best PSU under 100$ Corsair CX450 Corsair CX450 See On Amazon
Best Power Supply for AMD Ryzen 9 5900X NZXT C850 NZXT C850 See On Amazon

Best PSU for AMD Ryzen 9 5900X At a Glance:

Best PSU for AMD Ryzen 9 5900X Reviews

Corsair AX1000 PSU (Image credit: Amazon)

Corsair AX1000 PSU

Best PSU for AMD Ryzen 5900X


Brand: Corsair | Output Wattage: 1000 | Wattage: 1000 Watts | Cooling Method: Air | Power Supply Design: Full Modular | Fan Size: 135 Millimeters |


Fully modular

Sleeved cables

Selectable semi-passive mode

Ten-year warranty


The short distance between the peripheral connectors


Corsair isn’t a company that requires much introduction. The Corsair brand is one of the best in computer hardware. Regarding product innovation and development, Corsair is one of the best companies. Corsair’s AX 1000W Titanium Digital Power Supply is one of the company’s latest power supplies.

Among the most potent power supplies on the market, it will be an essential addition to any gaming PC equipped with the Ryzen 9 5900X processor. Corsair’s AX series power supplies are highly efficient, have stable voltage output, and operate quietly-all for a very reasonable price. This PSU features a good-sized cable set and a fully modular design.

I find it impressive that there are so many SATA connectors on this board, and I am pleased to see so many Molex connectors. As part of the package, an FDD connector adapter is included in case the user needs one. It comes with several exciting features that make it a fascinating power supply.

Fully modular, the AX 1000 is capable of delivering efficiency of 80 PLUS Titanium as well as low noise operation, allowing you to complete even the most ambitious builds. A ten-year warranty is included with all CORSAIR AX Series power supplies, so you can be sure that you will get reliable performance over a long period. A power supply like this one will be a fantastic match for AMD Ryzen 5900X processors.

Thermaltake Toughpower PF1 (Image credit: Amazon)

Thermaltake Toughpower PF1

Best PSU for AMD Ryzen 5900X


Brand: Thermaltake | Output Wattage: 750 | Wattage: 750 Watts | Cooling Method: Air | Power Supply Design: Full Modular | Fan Size: 120 Millimeters |


80+ Platinum Efficiency

Smart Zero Fan Feature

Quiet Fan



Thermaltake Toughpower PF1 PSU has 750 watts of maximum power, but it cannot compete with the leaders in its price range. Thermaltake has introduced the Toughpower PF1 750W to its line of high-quality power supply units (PSUs) that provide ultra-high quality power with low total harmonic distortion (THD) and extremely low ripple noise.

For entry-level gaming systems, workstations, and office PCs, the Toughpower PF1 750W is the ideal power supply. It works best with Ryzen processors. This power supply unit contains numerous cables and connectors, including two EPS, six PCIe, twelve SATA, and four 4-pin Molex.

The kit even includes an FDD adapter for those who might need it. It is nice to see that the distance between peripheral connectors and the cable length is adequate. Cable routing is complex because there are no in-cable caps.

Due to its high energy efficiency of 92%, the Thermaltake PF1 750W uses 80 plus to save energy. It is certified to 80 PLUS® Platinum. This power supply is optimized to work with Intel’s processors of all generations to achieve maximum efficiency.

In addition, the cooling fan on this PSU measures 120mm in diameter and uses a hydraulic bearing, so as long as you don’t operate it at high temperatures (above 40 degrees Celsius), it will last a long time. No doubt Thermaltake Toughpower PF1 is one of the Best PSUs for AMD Ryzen 9 5900X

Corsair RM750X (Image credit: Amazon)

Corsair RM750X

Best PSU For AMD


Brand: Corsair RMX | Output Wattage: 750 Watts | Wattage: 750 | Cooling Method: Air | Power Supply Design: Full Modular | Fan Size: 135 mm |


Excellent voltage regulation

Fully modular 2x EPS

4x PCIe connectors

Full power at 49 °C

Efficient, Silent and Low ripple


Again, CWT’s infamous solder bug strikes, but this time only on the VRM board

Fan-test button not available

In the world of power supplies, Corsair is a household name. To supply reliable power to high-end computers, the RM series has been created by Corsair for systems that need a high-quality power supply without sacrificing efficiency or generating excessive heat. Its modular cabling design permits easy installation and removal of unused connectors.

There is a 5-year warranty on the RM750x, and it is 80+ Gold certified for consuming less power, being quieter, and running cooler. Efficiency under high loads is the only area that can be improved, which is why the average efficiency is not so competitive. This white PSU is a good choice if you are looking for the best PSU for AMD Ryzen 5900X for under 150$. We can consider RM750x as the Best PSU for AMD Ryzen 9 5900X.

As the competition in this market has grown more intense, it is time for Corsair to update its famous RMx line of power supplies. Indeed the task’s tough since the prevailing RMx units only counted three years in production and delivered excellent performance alongside dead silent operation, but RM750x remains a winner in the 750W category if Corsair maintains its price under $133

XPG Core Reactor 650W (Image credit: Amazon)

XPG Core Reactor 650W

Budget PSU for AMD Ryzen 5900X


Brand: XPG | Output Wattage: 650 Watts | Wattage: 100W | Cooling Method: Air | Power Supply Design: Full Modular | Fan Size: 120 Millimeters |


10-Year Warranty

Full power at 47 degrees Celsius

Fully modular


Two EPS connectors on the same cable

The heat-dissipating addict should be in the center

The price is slightly on the advanced side

XPG rocked the boat with its Core Reactor line, an emotional set of PSUs using a competent platform handed by Channel Well Technology. XPG took over the CSE platform of the company and secured exclusive rights to it, so you won’t see another OEM using CSE. So far, only a few PSU brands own exclusive rights to OEM platforms. Corsair psu are quiet, so with this move, it is confirmed that XPG is serious about becoming the best power supply company in the world.

The XPG Core Reactor with 650W faced competition against many renowned power supply units in the market. It is emotional that still, it manages to win the race. In light of facts, historically, XPG hasn`t been such a power in the market. It has hired some professional people for this job. A compact footmark is also a significant feature of this PSU; it makes the installation process more easily manageable.

The completely modular lines will also help in this too. The lines do not have in-line capacitors, making string lodging harder than it has to be. The only debit in this unit is the brace of EPS connectors hosted on the exact string. It is generally recommended to install EPS connectors on dedicated lines to reduce voltage drops and enhance safety, but there aren’t enough sockets on the platform.

The price of this power supply made it eligible for our Best budget power supply for AMD Ryzen 5900X category. Shortly XPG Core Reactor 650W includes in the line of the Best PSU for AMD Ryzen 9 5900X.

Fractal Design Ion SFX 650W Gold (Image credit: Amazon)

Fractal Design Ion SFX 650W Gold

Best PSU for Gaming


Brand: Fractal Design | Output Wattage: 650 Watts | Wattage: 650 W | Cooling Method: Air | Power Supply Design: Full Modular | Fan Size: 120 Millimeters |


10 years warranty

Comes with SFX-to-ATX mounting bracket

$10 cheaper than the cheapest equivalent wattage competitor


Split ATX 24 pin at the PSU end

Split ATX 24 pin at the PSU end

High inrush current with 230V input

Silverstone was the first brand that took some severe interest in SFF PSUs, with the wealthiest related products portfolio. In the meantime, until Fractal launched these SFX Gold units, it had nothing to show for this order. Nevertheless, SFX is inaccurate since both Fractal Ion units are based on Silverstone’s unofficial SFX-L form factor. Because of the larger than SFX depth — by 30 mm — SFX-L units allow for more giant cooling suckers and better tailwinds.

That means they can have further relaxed addict speed biographies and be quieter than their standard SFX counterparts. On top of that, the larger PCBs also allow for advanced capacity units up to 1000W. The Ion SFX 650G is an excellent SFX power supply that can compete with Corsair SF600 power supplies in terms of performance and quality, which still leads the 600W SFX order with Cybernetics ETA-A and 80 PLUS Gold effectiveness instruments.

Compared to the Corsair SFX model of similar capacity, the Ion has a large fan with an aggressive speed profile. However, the ten-year bond, the largely flexible modular lines, and the ATX-to-SFX appendage type are missing in the SF600 Gold unit’s pack. Besides Corsair’s immolation, good rivals of the Ion 650G are the EVGA 650 GM and the Seasonic Focus SGX 650W, which uses the equal stage as the Ion unit.

Seeing a ten-year bond in an SFX power supply isn’t so frequent. Only Seasonic gave it until now, but since those Fractal Design power supplies share the same platform, they are covered by the same warranty.

Corsair CX450 (Image credit: Amazon)

Corsair CX450

Best PSU under 100$


Brand: Corsair | Output Wattage: 450 Watts | Wattage: 450 Watts | Cooling Method: Air | Power Supply Design: Non-Modular | Fan Size: 120 Millimeters |


5-year warranty

Good efficiency for a low-cost PSU



Short distance between peripheral connectors

The minor capacity factor of Corsair’s budget-initiated CX line is the CX450. CX models are manufactured by two companies: Great Wall and Channel Well Technology, each of which has its platform.

The only way to tell them piecemeal is through their RPS figures and source designators presented to each model. Both configurations have positioned lines to keep the cost as low as workable.

There is no comparison between the two Corsair CX450 models, with the one made by Great Wall being substantially more effective, specifically under light loads, and has a more effective 5VSB rail.

On the other hand, it has a higher-pressure fan profile, so its noise output rises. The forenamed RPS figures help with identification. CWT manufactured Corsair CX450s with the RPS0053 stamp, whereas Great Wall made one with the RPS0063 stamp. In the US market, you’ll only find the CWT version manufactured in Vietnam rather than China.

Accordingly, it avoids tariffs and keeps its price label low. The GW platform also serves other areas. In general, the Corsair CX450, in either flavor, offers a high performance per price rate, and it’s an excellent preference for mainstream builds with entrenched or low-power graphics cards. Such a performance on a low budget makes Corsair CX450 one of the Best PSUs for AMD Ryzen 9 5900X.

NZXT C850 (Image credit: Amazon)


Best Power Supply for AMD Ryzen 9 5900X


Brand: NZXT | Output Wattage: 850W | Wattage: 850 Watts | Cooling Method: Air | Power Supply Design: Modular | Fan Size: 120 Millimeters |


Long hold-up time

Low inrush current

Fully modular


Can be noisy under tough conditions

Mediocre transient response at 3.3V

NZXT has been in business for over a decade now and aims to be the best manufacturer of computer components. The company offers some of the most excellent products on the market, making it a leader in the field.

NZXT uses a diverse selection of materials when creating its product line, which makes them different from other computer case manufacturers. The NZXT C850 Gold is a modular power supply unit with an 850W output (958W peak) and an 80 Plus Gold rating for up to 90% electrical efficiency. It is also available in 650W and 750W models.

These days, all modular power supply units feature multiple power inputs so that the C850 can be used worldwide without flip switches. Although automatic power input switching has been a standard feature for a while, you don’t see it every so often, so it’s worth mentioning it’s included. The C850 silent mode is the most prominent feature, in addition to its impressive TEN-year warranty.

Under low loads, it acts as a toggle switch, which causes the fan to run at zero RPM. In some situations (sitting in front of the computer, doing office work, etc.), the PSU fan automatically shuts off to keep things quiet. The PSU fan will involuntarily ramp up to keep it cool as soon as you start a game or render that consumes a lot of power.

The NZXT C850 is a mid-range power supply designed to satisfy high-end gamers and PC enthusiasts, including 80 Plus Gold efficiency and a single +12V rail. NZXT’s C850 PSU provides 850 watts of power at 12V while having excellent voltage regulation. Because of its high efficiency, it’s a great choice for gaming systems. This PSU is undoubtedly one of the best for AMD Ryzen 5900X.

Quick Shopping Tips

The power supply is one of the most challenging components for first-time builders. They don’t really contribute to your system’s aesthetics, and they won’t increase your framerate. There is no component more vital to the long-term health of your system than your power supply. PSUs are important, even if they are not as glamorous as a new graphics card, processor, or any other component of your PC.

Power supplies are the beating heart of your PC, so if you buy a cheap one, you put your entire system at risk. When it comes to upgrading your PC, your power supply can limit your options, so you should look toward the future when choosing your next power supply. Before buying the best PSU for AMD Ryzen 9 5900X, here are some factors to consider.

Look for 80 Plus Certified PSU

An 80 percent efficient power supply delivers 80 percent of its rated wattage to your system while losing the other 20 percent as heat. Manufacturers submit power supply samples for testing and certification to an independent body under the 80 Plus certification program.

To earn the 80 Plus certification, the supply must be at least 80% efficient at three load levels, namely 20, 50, and 100%. However, power supplies with higher certification tiers tend to be more expensive. If you’re a user with average needs, you’re probably better off sticking with a simple 80 Plus or 80 Plus Bronze level unless you find a particularly good deal on a Silver or Gold PSU.

Don’t Go For Cheap PSU

If your computer parts consume a lot of wattages, make sure the Power Supply Unit can provide at least 30% more than that. Although PSUs aren’t very expensive when compared to other parts, most people go cheap for the same reason. Power supply units affect every part of your computer system and can fry circuits in the event of a power surge.

When it cannot keep up with the electrical demands of your machine, the cheap power supply can ruin your performance. Running it hard and letting it fail quickly will cost you more in the long run. You are risking permanent damage to your other components if you buy a cheap power supply.

The Number of Power Connectors

When shopping for an ideal PSU, you should also consider the number of power connections. Normally, mainboard power supplies are 24- pin (20 + 4) while CPUs and GPUs have 8-PIN (4 + 4) and 8-PIN (4 + 6) power connectors, respectively.

Additionally, if you plan to increase the number of graphics cards or SATA hard drives at some point, you should also consider the number of D-type and SATA interfaces. This will allow you to reserve some power ports.

Choose the Cables Wisely

There are three types of cabling: Hard-Wired, Semi Modular, and Fully Modular.

  • In a Semi-Modular PSU, some cables (e.g. motherboard and CPU cables) are permanently attached, and others (e.g. PCIe, SATA, and Molex) are removable. In terms of cable management, modular PSUs are a major advantage.
  • The Modular Power Supplies allow the builder to attach (or detach) cables as they are needed. Modular PSUs allow builders to only use the cables required for the build, which reduces the amount of clutter in the case.
  • The Hard-wired PSU contains the cables that are connected to PSU. These cables cannot be detached or changed. Although this setup is cheaper than the other two cabling options, it is limited in plugs and is not suitable for customizing.

Fan Noise

Power supplies generate heat. Fans are needed to keep them cool and running efficiently. The quietness of your PC will depend largely on the environment in which it runs. A PC that runs in a quiet space may benefit from larger fans that spin more slowly to move the same amount of air. As far as power supply cooling is concerned, there aren’t any real standards, so you’ll need to compare marketing materials for your options.


Finally, I think you clearly know what power supply is best for AMD Ryzen 5900X. We also discussed what to look for before buying the Best PSU for AMD Ryzen 9 5900X. Also, his article’s top pick power supply is the Corsair AX1000. If you are looking for a budget power supply, then the XPG Core Reactor 650W is an excellent choice.

Frequently Asked Questions

How many watts does a Ryzen 9 5900X use?

Power consumption, efficiency, and thermals for Ryzen 9 5900X. AMD’s decision to stick with the AM4 socket still limits the maximum power consumption to 142W.

Is a Ryzen 9 5900X overkill?

While it’s a very capable chip, if you don’t take advantage of its potential to fully utilize its cores and multitasking capabilities, it becomes overkill.

How hot does a Ryzen 5900X get?

It is 38-40 C in the idle processor and 49-51 C in the CPU package. CPU Package temperatures can peak at 86-90 C under heavy gaming.

How many years will a 5900X last?

Ryzen 9 5900X and 5950X CPUs are top-of-the-line and should perform well for at least five years.

Does Ryzen 9 5900X have integrated graphics?

The Ryzen 9 5900x does not have integrated graphics or a GPU, just like other Ryzen processors.

Asad Malik
My name is Asad Malik, and I have done my intermediate in Computer Science, and I really enjoy finding out about the newest tech products, buying them, and writing reviews on them.