Best SFX Power Supply

Questing for the best SFX power supply for external cooling and better load management of your system? Here’s what you need to list down before getting power supply for gaming PCs. Before getting the right PSU, make sure it matches with your system specs. If it needs a 300W supply, why spend $30-40 more on a 500-watt cooling system when you will never exceed above its 50% load capacity.


Seasonic Focus SGX-650

 Seasonic Focus SGX-650 650W 80+ Gold

  • Gold Certified
  •  SFX and ATX
  • 10-year warranty


 EVGA SuperNOVA 650 GM, 80 Plus Gold 650W

  • 95% Efficiency
  • Supports all Factors
  • Power Self-tester

FSP Dagger 500W

FSP Dagger 500W Mini ITX Solution/SFX 12V

  • VR/4K Ready
  • Dual Fans
  • Gold Certified

All the newer model PSU are gold-plated, the most common, and SFX power supply being the 80plus gold certified. Also, make sure to look for fully modular and E-cap technology for fast cooling and max endurance when operated.

List of Best SFX Power Supply

NameAlready Sold RatingPricing
Asus Rog Thermaltake Toughpower SFX 450W
CORSAIR SF Series, SF600
Seasonic Focus SGX-650 650W 8010000+4.7
EVGA SuperNOVA 650 GM15000+4.7
FSP Dagger 500W Mini ITX Solution300+4.8

Thermaltake Toughpower SFX 450W

Thermaltake power supply is for hardcore SFX gamers that need an additional power supply to meet the gaming  Thermaltake Toughpower SFX 450W 80needs for their graphics support. It can support any mainstream system and is feasible for any range up to 450W. The wattage capacity is higher than normal with alterable 12v input voltage and high current endurance.

It has top-notch SFX to ATX adapter bracket to comfortably install SFX power supply into ATX case. The fan speed is controlled with the specialized inner sensors that work flawlessly at full speeds and zero-RPM modes. Zero-RPM modes allow users to run systems in silent modes with complete automatic noise elimination when there’s no use of it.

Thermaltake Toughpower SFX 450W has an 80 plus gold certified structure made in line with all the latest CPUs. It delivers up to 90% efficiency to the system at 50% loads. The energy-saving mode enables maximum conductivity with minimal power losses, thanks to the super-conductive gold plates inside the PSU.

Thermaltake 450W has ribbon cables to endure high currents at low voltage levels. The cable length and width are enough to accommodate ten times the normal current. The low-profile design makes it easier to install and manage cable for later, it reduces fuss and enables the much-needed airflow for heat dissipation inside the chassis.

The high-capacity Japanese capacitors make sure they are never retired with overcurrent, they are rated 10x the normal current flow. Toughpower power supply comes with fully modular flat cables and an extended 7-year warranty for cables, frames, and hardware. A 12V+ rail design makes sure you will find it fit for any CPU model.

  • 80plus gold power supply
  • Feasible for both SFX and ATX mounting
  • High-power 450W supply
  • 12v+ rail design
  • Zero-RPM mode
  • Bulky in weight
  • Expensive product

CORSAIR SF Series, SF600

Corsair SF series has large input power and current capacity. The novel SF600 has enormous 600W power  CORSAIR SF Series, SF600, 600 Wattendurance with high-end performance parameters, thanks to the Japanese capacitors and 80plus gold certification for higher efficiencies and more working hours.

The power supply has a compact design, breathable brackets for higher CFMs, and low-profile design for better cooling throughout. It has a temperature endurance of up to 40-degree Celsius at continuous running modes. The exchangeable ATX to SFX brackets provides additional space and a higher compatibility range to install in multiple systems.

The compact design can be adjusted anywhere. There are upgrade options available for additions and subtractions to the power supply as SF600 is fully modular for changes. The 105 electrolyte capacitors are rates 10 times larger than what system could endure at normal operations, so it will last for a lifetime with fortified internal circuitry. They can endure up to 105-degree at max retaining all the functions at once.

The cooling fan speed is standardized with the lowest noise range possible. If there’s no need for a fan, it will automatically adjust to a zero-RPM mode for silent gameplay from zero to 30% load. The cables are detachable and secure for a PC. they are made smaller and clutter-free to avoid tangling and unwanted connections with fans or other components. They also save space; the low-profile design makes room for a nice airflow rate when the power supply starts running.

The efficiency range is between 85-90% for an updated 80plus gold certified power supply model. It dissipates lesser heat and hence more power in use. At loads somewhere between 30% to 55%, the efficiency is kept at 90%.

  • Works on all the systems
  • Maximum efficiency, up to 90%
  • Ergonomic design and clean build
  • 7-year manufacturer’s warranty
  • Lightweight and compact
  • 600-watt supply may not be necessary for some medium-end systems
  • Overpriced for its features

Seasonic Focus SGX-650 650W 80+ Gold SFX 12 V/ATX 12 V Full Modular 

If an internal cooling system has given up on high-graphics systems, better buy the best SFX power supply for the  CORSAIR SF Series, SF600, 600 WattCPU. Seasonic focus SGX-650 is a 650W SFX and convertible ATX power supply with maximum efficiency, load endurance, and intelligent zero-RPM modes for silent operations.

Focus SGX-650 has 80plus gold plated circuits, a powerful fan for heat dissipation and airflow, low-profile cables, and maximum voltage ranges for regulation purposes. Seasonic Focus has 90% efficiency at 50% load. The maximum efficiency can be obtained and retained at anywhere between 33% to 55% of output power.

The output voltage range can be altered to anywhere between 12v, 5v, and 3.3v voltage rails. A 12v voltage rail manually allows regulating voltage and works on all the power outputs. 80plus gold circuit allows maximum conductivity, allows great efficiency and responsiveness to and from the system.

There’s a 120mm fluid dynamic bearing for fast cooling. Fans are managed by the S3FC fan controller at full speeds and zero-RPM modes. The fan control keeps the power supply on zero-RPM mode until 30% load and then rotates a fan gradually on normal and full loads.

The compact build is compatible with all the SFX and ATX chassis. It easily fits the SFX form factor and is convertible to fit ATX chassis via an adapter bracket. It makes more space inside your PC with its standard dimensions and install-ready design for next-generation PCs.

FDB fan power supply comes with a 10-year product warranty and a hassle-free 30-day guarantee by Amazon for malfunction coverage or broken/damaged products. The power supply works on all the 110 – 220v voltage supplies.

  • 10-year product warranty
  • Works on SFX and ATX form factors
  • Compact design and lightweight
  • High power capacity i.e. 650W
  • Constricted voltage regulation
  • 80plus gold certified
  • Cost exceeds $100 mark
  • Only Large-size power supply available in 650W

EVGA SuperNOVA 650 GM, 80 Plus Gold 650W, Fully Modular

EVGA supernova 650GM is a fully modular power supply for external cooling operations. It enables high-end  EVGA SuperNOVA 650 GM, 80 Plus Gold 650Woptimization and long-term performance of your PC. EVGA has a power capacity of up to 650W with efficient operation, better compatibility range for all the SFX and ATX form factor, and low-profile design for compactness.

The latest power supply model mounts easily on the SFX form factor. Also, there’s an SFX to ATX adapter bracket to fit into ATX chassis. The circuit is 80plus gold certified with maximum conductance and hence lesser heat dissipation and losses.

It also includes power ON self-tester for Undervoltage and overvoltage protection. The power supply is completely insulated with overcurrent, overvoltage protection, undercurrent protection, overpower protection, short circuit protection, and over-temperature protection.

The supply is made fully modular, it reduces tangling and provides a path for hindrance-free airflow to the CPU. The 105-degree Celsius capacitors are better off than all the normal capacitor banks, they work reliably on high-temperature ranges. Plus, the fans are rotated with double ball bearing reducing noise to considerable levels.

Zero-RPM mode stays activated up to 30% of total load capacity i.e. 200W. The power supply remains 90-95% efficient until 55% of load capacity at 110-220v AC. EVGA Supernova also enabled automatic power factor correction by using capacitor banks.

  • Works at up to 95% efficiency
  • Supports all form factors
  • Includes Power ON self-tester
  • 80plus gold certified
  • Don’t buy before checking system requirements and capacity
  • Shipping charges may apply on all orders

FSP Dagger 500W Mini ITX Solution/SFX 12V / Micro ATX 80 Plus Gold

FSP Dagger 500W is a mini-styled medium power supply for robust external cooling. it features high-end capacitor FSP Dagger 500W Mini ITX Solution/SFX 12Vbanks, thermal sensors, protective sensors, and an ergonomic build. The medium-range model is fully protected with the electrolyte capacitor and an operative temperature range of 105-degree Celsius.

It is made with a fully modular design, there are no wire hassles, neat and clean PCB with ribbon cables for maximum clearance space. The low-profile design and cables help maximum airflow into the PC. The design is 80plus gold certified, it has maximum conductivity range and heats up slightly compared to normal metals.

A powerful single rail design features 12v+ at receiving end for PC. it can also be switched to 5v and 3.3v for multiple purposes other than PC cooling. The efficiency range is quite high at normal loads i.e. up to 92% with 220v AC at 50Hz when 33-50% load is applied to it. FSP Dagger is VR and 4K ready, it has optimal cable length to reach the socket, and has sturdy PS2 casing for rugged situations and portability.

FSP Dagger can fit to all the SFX and ATX form factors. It usually fits SFX without any casing. For ATX chassis, a DIY adapter bracket is provided to fit into ATX chassis.

  • VR/4K ready gaming power supply
  • 80plus gold certified
  • Mini version fits to all the medium- and high-end systems
  • Dual ball bearing fans
  • Weighs up to 3.76lbs
  • Expensive than its 500-watt counterparts