Top-Rated SFX Power Supplies (PSUs) in 2023

Top Picks
Corsair SF Series Power Supply

Corsair SF Series Power Supply

Fully Modular SFX Form Factor
750 Watts Power Capacity
Platinum 80+ Rating
SilverStone SX700-PT Power Supply

SilverStone SX700-PT Power Supply

Platinum 80+ Certification
Silent 92 mm FDB Fan
18 dBA Noise Level
Fractal Design Ion SFX 650G Power Supply

Fractal Design Ion SFX 650G Power Supply

650 Watts Power Capacity
80+ Gold Certification
Ultra-flex Cables
money value

SFX Power supplies (PSU) are utilized in smaller size cases, such as Micro Advanced Technology Extended (Micro-ATX) as well as Mini Information Technology extended (Mini-ITX) for powering the motherboard & other components. They are smaller than conventional ATX power supplies but provide comparable power outputs.

As SFX power sources are less powerful than the full-size ATX power supply, they usually utilize smaller fans, which require them to work harder in order to provide cooling. Recently, power supplies that are fanless are also becoming accessible.

It is possible to add ATX power supplies to smaller cases, however, their bigger size and longer cables may consume too much space. A smaller space can mean more heat and less space for additional components. However, the majority of the SFX power supply can be connected to an ATX case with brackets.

Best 6 SFX Power Supply (PSUs): 2023 Expert Edition | A Quick Glance

RankingBest 6 SFX Power Supply (PSUs)Reviews
1.Corsair SF Series Power Supply5 out of 5
2.SilverStone SX700-PT Power Supply5 out of 5
3.Fractal Design Ion SFX 650G Power Supply4 out of 5
4.Cooler Master V750 SFX Power Supply4 out of 5
5.FSP 450W Mini ITX Solution Power Supply4 out of 5
6.Seasonic Focus SGX-650 Power Supply4 out of 5

Best 6 SFX Power Supply (PSUs): 2023 Expert Edition | Detailed Review

1. Corsair SF Series Power Supply

Corsair SF Series Power Supply

1. 3.94 x 4.92 x 2.5 inches
2. Weight 1.98 Pounds
3. Output Wattage 750 W
  • Great Ripple Suppression
  • Tight Load Regulation
  • Expensive Pricing 
  • Low Hold-up Time

Corsair should be a common name to the majority of our readers because the brand, as well as its merchandise, are appreciated by a large number of reviewers, content creators, and even enthusiasts. Corsair has introduced the most efficient SFX PSU power supply to our list, so be sure to look it up.

There shouldn’t be any reduction in the efficiency of your energy in order for your equipment to endure at least 10 years and maintain its running costs in a reasonable range. The Corsair SF Series SF750 is able to make this possible as its power output of 750 watts is and is backed by a platinum certification from the 80 + certification program. The power is offered in a completely modular SFX PSU design, which is like other models in regards to dimensions.

Despite the energy efficiency, Corsair SF Series SF750 can be managed with a low operating cost and reduces the amount of heat essential for small systems. The paracord cables included for this model are sleeved, which makes routing much more efficient.

You will also not hear any sound coming from this power supply due to its low-noise operation, which is driven by an air-cooled rifle bearing. It comes with seven years of warranty duration with the Corsair S Series SF750. You can also call it the best power supply for a gaming PC.

2. SilverStone SX700-PT Power Supply

SilverStone SX700-PT Power Supply

1. 3.94 x 4.92 x 2.5 inches
2. Weight ‎4.58 pounds
3. Output Wattage 700 W
  • Standard SFX Form Factor
  • 3% Voltage Regulation
  • Low-Noise Levels
  • Heavy Duty Setup

The SilverStone SX700 SFX power source is the 2nd choice on the list today because it packs a massive 700 watts of power within the typical SFX PSU design, which is a scarce sight. It’s packed with silent 92mm FDB running fans and a minimum noise of 18 dBA.

All the capacitors that are employed in this fully modular power supply are Japanese. This means that you’ll receive an 80+ platinum rating for efficiency on this item. It is equipped with the industry-standard single 12 voltage rail OCP circuit which allows 3 percent voltage regulation as well as very low noise levels while it is at full capacity.

Because of the modular layout of the PSU, it is in a position to only install the cables you need in your system. You are able to also choose cables that are custom-made for aesthetics. In addition, the standard cables come with flexible flat arrays which allow for easier management of cables. The cables come with a 5 year extended warranty excellent for its cost.

3. Fractal Design Ion SFX 650G  Power Supply

Fractal Design Ion SFX 650G Power Supply

1. 10.24 x 6.69 x 3.7 inches
2. Weight ‎4.76 pounds
3. Output Wattage 650 W
  • Semi-passive Silent Mode
  • Ultra-flex Cables
  • Bad Build Quality 
  • Expensive Pricing 

Fractal is also a good alternative for mid-level desktop systems which include a powerful processor and graphics card. You can however be able to find Fractal’s SFX power supply at an affordable price compared to its competition.

There’s always something new in the new companies on the market, as they have lots to offer with their products. For instance, in this case, Fractal Design Ion SFX 650G comes with an array of ultra-flex cables that easily bend and twist in any direction you wish. They will not break easily and are ideal for use in compact cable management. The Fractal Design Ion 700G comes with an 80 plus gold certification for its 650-watt power capacity, which optimizes your performance while minimizing the amount of heat generated.

If you’re using your computer for non-essential tasks, it will switch to a semi-passive quiet mode to minimize the noise of the fan. Overall, it provides an uninterrupted electrical supply to the components and has an exact voltage control that has a minimal variation in DC current. Although this brand is not as well-known, you can count on its reliability with its 10-year warranty. It is one of the best power supplies for gaming PC.

4. Cooler Master V750 SFX Power Supply

Cooler Master V750 SFX Power Supply

1. 3.94 x 4.92 x 2.5 inches
2. Weight ‎3.88 pounds
3. Output Wattage 750 W
  • 90% Load Efficiency 
  • 16 AWG cables
  • No MOV & NTC Thermistor
  • Not Ideal Gold Rating

If you’ve been searching for a high-quality, reliable, and strong SFX Power Supply, it’s here. The Cooler Master V750 SFX Gold Full Modular is among the top-quality options on the market and is also one of the most powerful selections on our list of today. It boasts a staggering capacity of 750 Watts that is more than sufficient to power the most recent generation of CPUs and GPUs. Additionally, it comes with an 80+ gold rating which guarantees the safety of your hardware when they are fully loaded.

Even with these powerful specifications, it is still a compact unit. Cooler Master V750 SFX Gold is offered in a smaller SFX PSU form factor compatible with SFX and miniature ITX cabinets. It also comes with an SFX to ATX bracket included in the PSU should you decide to mount this unit inside the ATX case. The effectiveness of this unit is up to 90% under normal operating conditions.

The cables used in these units are also safe and reliable due to their 16 AWG thick type of cable. The product comes with a long warranty period by Cooler Master that is likely to last for the whole life of the desktop computer.

5.  FSP 450W Mini ITX Solution Power Supply

FSP 450W Mini ITX Solution Power Supply

1. 5 x 4 x 2.5 inches
2. Weight ‎2.68 pounds
3. Output Wattage 450 W
  • 80 mm Cooling Fan
  • 85% Load Efficiency
  • Low Power Capacity
  • Expensive Pricing

There are plenty of people who are searching for a budget-friendly desktop with minimal energy requirements. If you’re searching for a system like this, consider looking at FSP’s basic SFX PSU flexible power source.

If you plan to install a basic GPU or CPU on your computer, the FSP 250W Mini ITX Power supply is the ideal option to meet your needs. This power supply falls into the miniature ITX category which means that it’s perfect for most compact cabinets on the market.

Additionally, it has power of 450 watts which should be sufficient to run your system effortlessly. It comes with a bronze plus efficiency certificate which is good for its low price. It is possible to expect up to 85 percent efficiency from this power supply with an average load. This is for casual gaming as well as everyday tasks that require a lot of productivity. It is equipped with an 80 mm cooling fan within the device that helps reduce its size.

It runs on an intelligent system to control the speed of the fan which automatically adjusts the fan speed and noise to the needs of the user. It’s also a modular PSU and includes black ribbon cables included in the box. Additionally, you will find a PS2 bracket included with the unit that allows the installation of the unit inside the ATX case.

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6. Seasonic Focus SGX-650 Power Supply

Seasonic Focus SGX-650 Power Supply

1. 4.92 x 2.5 x 4.92 inches
2. Weight ‎4.49 pounds
3. Output Wattage 240 W
  • 90% Efficiency at 50% Loads
  • 120 mm FDB fan
  • Single EPS Connector
  • Inefficient 5VSB Rail

The next option is the 650-watt power supply that comes from SeaSonic. The SeaSonic SGX-650 is among the most efficient choices from our selections since it has an 80 + gold certificate which means it is nearly 90% efficient, even at 50% capacity for load. Although this power supply is within an SFX PSU model, it’s compatible with both SFX and ATX form cabinets.

Like our prior choice, it has the voltage at 3 percent over 12 Volts, 5 Volts, and 3.3 voltage rails. The Seasonic Focus SGX-650 650W will be an excellent choice in your laptop case if you are looking to eliminate cables and ensure good airflow throughout the system. It is a modular design that permits you to select precisely the appropriate power cables for your specific components.

To cool the unit, it comes with an inbuilt 120mm FDB fan equipped with the latest SeaSonic fan control. It will shut off the fan when it is under 30 percent load. Also, it comes with a 5-year warranty.

Factors to Keep in Mind While Shopping For SFX Power Supplies


Before you decide on a power supply, it is crucial to know the power requirements that your device requires. In order to do this, it is necessary to calculate the power requirements for each individual component in the motherboard.

This includes the GPU, CPU RAM, CPU, and other crucial components in the system. After you’ve gotten an approximate figure of the needed wattage, it is recommended to get a PSU with a minimum of 30% – 40% more power to ensure you are safe. However, an excessively high power supply is not helpful for your computer and could increase your electricity bills because of the high power consumption.


The cables play an important function in your system since they transfer electricity from the unit that powers the motherboard, and various other parts that make up your computer. It is important to take this into consideration prior to finalizing the purchase of your SFX power supply in order to ensure the longevity of the device. The cables should be checked thoroughly prior to purchasing the unit, and before placing the unit into the cabinet, so that they do not cause problems after the setup is completed.


The brand or manufacturer of the power supply is crucial when choosing one of the many available. In the majority of cases, you will see an increased power rating on the item that isn’t able to provide sufficient energy to your system. This is usually the case with third parties and common PSUs. To avoid the issue, make sure you choose your PSU from a reputable brand that has previously been used by a number of customers around the world. On our listing, you’ll see all of the reliable brands that are available to ensure that you don’t need to question the reliability for your SFX Power Supply.


Each power supply unit is certified by a specific certification process known as”80+ certification. This certification body gives an appropriate level of rating for each unit, which includes either silver, bronze platinum, titanium and. Within this category, bronze-rated power supply models are among the least efficient units for power supply, while the power supply rated with titanium models is most effective.

If you’re purchasing an insufficient capacity power supply, it is recommended to select an 80+ rating since it indicates the best product suitable for long-term usage. The majority of bronze-rated PSUs can be up to 88% efficient at 50% load while titanium ones are around 96% efficient at the same.

Frequently Asked Questions (FAQs)

Q1. What is an SFX power supply?

Power supplies SFX (PSU) are employed in smaller size cases, such as Micro Advanced Technology Extended (Micro-ATX) or Mini Information Technology extended (Mini-ITX) to power the motherboard as well as other components. They are smaller than conventional ATX power supplies but provide the same power output.

Q2. What is a SFX case?

The A4-SFX is a single-person project with the intention of building the most compact case using the highest-end components like Ryzen(TM) seven processors as well as high-performance full-length GPUs, such as GeForce RTX(TM) 3080. It’s a distinctive product smaller than the majority of cases.

Q3. What is the SFX form factor?

SFX (PSU) A design for a small-form dimension (SFF) of the power supply’s casing. Small-form factor (desktop as well as motherboard) is a term used to describe smaller than traditional form factors for components of computers.

Q4. Is SFX Micro ATX?

The MICRO ATX450 was designed to be compatible with the majority of small form factor systems that have high power output. Power specifications are fully compatible with Intel as well as AMD power CPUs and typical PC configurations.

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