Best SFX PSU or Power Supply for Mini ITX and SFX Cases in 2017

If you are building a mini-ITX / SFX / SFF gaming PC or HTPC they you may require a SFX PSU or power supply. A SFX PSU is a small form factor power supply that is smaller than a regular ATX PSU. A regular SFX Power Supply is up to 125mm long (in depth) while a normal ATX power supply is more than 140mm in length and it can go to upto 180mm. Also a SFX PSU has much smaller overall dimensions compared to a regular ATX power supply and some of them even come with smaller fan.

A SFX PSU is generally used in small form factor PCs having mini-ITX or SFX cases. This is because mini-ITX and SFF / SFX cases have space constraints and some of them only require SFX power supplies. There is not enough range of SPF PSUs available in the market but here I am going to provide you the list of best SFF power supplies or SFX PSUs with their specifications. These small form factor power supplies can used for your SFF Gaming PC or HTPC.

Read also: Best Budget PSUs for Gaming PC

Top SFX PSUs for SFF Gaming Build or HTPC

Here are the best SFX or SFF PSUs that can be used in all the compact PC cases or SFF cases.

SilverStone 450W SFX PSU 80 Plus Bronze (ST45SF-V3)

This is a decent Silverstone SFX power supply from SilverStone Technology. SilverStone ST45SF-V3 is a 450 Watt SFX power supply has good build quality and is quite affordable too. This is a good SFX power supply for a mini-ITX or SFF gaming PC or an HTPC. It is an 80 Plus Bronze certified PSU and has efficiency of around 82% – 85%. On the back side you can find ON/OFF switch which can prove very handy sometimes.

SilverStone Technology 450W SFX Form Factor 80 PLUS BRONZE Power Supply (ST45SF-V3)This SFF power supply has got single 12V Rail that has maximum current of 36A current on it. It can support up to mid-range graphics cards from both Nvidia and AMD. The power supply comes with all sleeved cables and has got a 92mm fan for cooling. The performance of the fan is quite good but it is not so silent, so HTPC users may not like it. Also the power supply comes with one 6-pin PCI Express power connector for graphics card and SFX to ATX Bracket for use in regular ATX cases. Overall it is a good SFX PSU that supports both ATX and Mini-ITX motherboards and it comes at a great price too.

SilverStone 450W SFX Power Supply (V3.0) Specifications
Wattage 450W
12V Rail 36 Ampere (Single Rail)
Fan Size 92mm
80 Plus Certification Bronze
PCI Express Connector 6 Pin x 1
Warranty 3 years

Buy Silverstone SFX 450W Power Supply

Corsair SF600 SFX PSU 80 Plus Gold

Corsair SF600 is one of the best branded SFX power supplies that you can buy for mini-ITX or SFF build whether it is a gaming PC or a silent HTPC. This is a power 600 Watt fully modular power supply that can be used in high-end SFF gaming build equipped with mid to high-end graphics card.

Corsair SF600 SFX PSU

The power comes with single 12V Rail having 50A current on it. The modular cables are soft, flexible and easier to work with. Corsair SF600 has got 80 Plus Gold Certification and you can expect 90% or more efficiency at 50% load. It comes with a super silent 92mm that has Zero RPM Fan Mode. This means the fan does not spin when the load on the PSU is low. For graphics cards it comes with two 8pin (6+2) PCI Express power connectors or cables. On the back of the SMPS you can find on / off switch. This power supply is compatible with both mini-ITX and ATX motherboards and cases.

Corsair SF600 SFX Power Supply Specifications  
Wattage 600W
12V Rail 50A  (Single Rail)
Fan Size 92mm
80 Plus Certification Gold
PCI Express Connector 8pin (6+2) x 2
Warranty 7 years

Buy Corsair SF600 SFX Power Supply

Thermaltake Toughpower SFX 450W Gold

Thermaltake is a quite a big name in cooling solutions and power supplies. Here we have Thermaltake Toughpower SFX 450W Gold power supply which is a high-quality SFX PSU for small form factor computers. This is a fully modular 450W power supply and is 80 Plus Gold Certified for higher efficiency. The power supply is only 100mm in length which makes it fit in smallest of the cases.

Thermaltake Toughpower SFX 450W Gold

It has got 37A current on its single 12V Rail which is enough for building a mid-range SFF gaming PC or a powerful HTPC. This SFX Power Supply from Thermaltake comes with a super silent 80mm Zero RPM Smart fan which will not spin when the load on the PSU is low. All the cables are braided and are quite strong. There are two 8-pin (6+2) PCI-E power connectors for graphics cards and the PSU comes with a SFX to ATX Adapter Bracket for use in normal ATX cabinets. There is also a 600W model available for this power supply for users who have higher power requirements with their SFX gaming build.

Thermaltake Toughpower SFX 450W Gold Specifications
Wattage 450W
12V Rail 37A, Single Rail
Fan Size 80mm
80 Plus Certification Gold
PCI Express Connector 8-pin (6+2)
Warranty 7 year

Buy Thermaltake Toughpower SFX 450W PSU

Buy Thermaltake Toughpower SFX 600W PSU

FSP Group 450 SFX PSU (80 Plus Bronze)

This is a decent budget SFX power supply from a lesser known brand which is FSP Group. This small form factor power supply has 80 Plus Bronze Certification and has maximum output of 450 Watts. It does lack on some quality as the cables are not sleeved or braided.

FSP Group FSP450-60GHS(85)-R 450W SFX PSU

It comes with dual 12V Rails with maximum of 36A current in total (18A + 18A). There is an 80mm fan which is a bit loud compared to other branded SFX power supplies from Corsair or Thermaltake. For graphics card it comes with 8-pin (6+2) and 6-pin PCI-E power connector which is enough to power a mid-range graphics card. On the back side you can find a ON/OFF switch and the PSU does come with SFX to ATX bracket so that it can be made fit in standard ATX cases or mini-ITX cases that support ATX PSUs. The exact model number for this sfx power supply is FSP450-60GHS(85)-R 450W.

FSP Group FSP450-60GHS(85)-R 450W SFX PSU Specifications
Wattage 450W
12V Rail 36A (18A + 18A), Dual Rails
Fan Size 80mm
80 Plus Certification Bronze
PCI Express Connector 8-pin (6+2), 6-pin
Warranty 3 year

Buy FSP Group 450 SFX PSU

Enermax Revolution SFX 550W 80 PLUS Gold PSU

Enermax may not be a well known brand or company but it does offer a very good SFX power supplies. Here we have Enermax Revolution SFX 550W power supply which is an 80 Plus Gold certified PSU and has efficiency of up to 92%.  It is a high quality fully modular power supply that comes with strong and sturdy flat cables and has 100 percent Japanese Capacitors.

Enermax Revolution SFX 550W 80 PLUS Gold

This SFX power supply from Enermax has got single 12V rail with 46A current on it. It can power a powerful gaming PC with mid-range or high-end graphics card installed. For graphics card it comes with two 8pin (6+2) PCI Express power connectors. The power supply comes with an 80mm fan which is quite silent and works only when the load on the PSU is high. Also the PSU comes bundled with SFX to ATX adapter bracket for use in regular ATX cases. The various protection features in this power supply include OPP, OVP, UVP, OCP (+3.3V/+5V), OTP, SCP, and SIP. The exact model number of this SFX PSU is ERV550SWT. There is also a 650W model available of this SFX power supply for users who have higher power requirements. You can check both the models by going through the links given below.

Enermax Revolution SFX 550W Specifications
Wattage 550W
12V Rail 46A, Single
Fan Size 80mm
80 Plus Certification Gold
PCI Express Connector 8-pin (6+2) x 2
Warranty Check Seller

Buy Enermax Revolution SFX 550W PSU

Buy Enermax Revolution SFX 650W PSU

Final Words

At the end I would like that if you are building a SFX or SFF gaming PC or HTPC then these above mentioned SFX PSUs are great options to go with. All these small form factor power supplies are quite powerful, have good build quality and offers good performance. Also these SFX PSUs can be used in both SFF and regular ATX cases using the SFX to ATX Bracket. If you have any queries about power supplies. graphics cards or gaming build then you can ask me that by leaving a comment below.

2 Comments

  1. Konstantinos April 30, 2017
    • Akshat Verma May 1, 2017

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