When it comes to selecting the perfect components for your dream gaming PC, it can seem a little daunting. Especially when you have to consider the size of your hardware, not just the type of hardware you need.
But fear not – that’s where our team of PC experts at Overclockers UK comes in! We’ve compiled this handy guide on everything you need to know about different power supply (PSU) form factors. Sit back, grab a brew, some biscuits, and let’s get to it.
What is the Power Supply (PSU)?
Just as the name suggests, the power supply is what supplies the stream of power to all of the components in your gaming PC. Every PSU comes with different voltages and efficiency ratings.
If you want more information about power supplies, check out our ultimate guide to PSUs.
What are the Different Form Factors?
The standard PSU form factors are:
- ATX
- TFX
- SFX
- SFX-L
ATX:
The most widely available form factor, ATX PS/2 can fit into most PC chassis, from micro-ATX and above, and come fully equipped with comprehensive cooling solutions. A combination of intelligent fan bearing technology and integrated fans helps to ensure your gaming PC stays cool and quiet!
As ATX is most commonly used by gamers and enthusiasts alike, these PSUs often come in varying styles, colours, and some even include additional RGB lighting for an added flair to your PC.
Corsair RM850x 850W 80 Plus Gold Modular PSU:
- 850W
- 80 Plus Gold rating
- Modular
- ATX form factor
Silverstone SST-DA1650-G 1650W 80 Plus Gold Modular PSU:
- 1650W
- 80 Plus Gold rating
- Modular
- ATX form factor
SFX:
If you are creating your dream gaming PC but require one that saves space but is packing in performance – you will want to invest in an SFX PSU.
Often measuring at 100mm x 125mm x 63.5mm, these PSU may be small, but still offer up to 800W, and are therefore perfect for a high-powered small gaming set-up. SFX PSUs will effortlessly fit into any size of PC chassis, even a mini-ITX or micro-ATX.
What’s more, since they are designed to save on space, SFX PSUs are typically fully modular. This means you can pick and choose what cables to use, and reduce unsightly cable clutter.
Lian Li SP750W 750W 80 Plus Gold SFX Modular PSU:
- 750W
- 80 Plus Gold rating
- Modular
- SFX form factor
Thermaltake Toughpower SFX 850W 80 Plus Gold SFX Modular PSU:
- 850W
- 80 Plus Gold rating
- Modular
- SFX form factor
SFX-L:
The larger model of an SFX, an SFX-L PSU, is typically 125 x 125 x 63.5mm in size. Designed to still save on space, SFX-L power supplies can still fit into smaller cases, such as a micro-ATX.
Similar to SFX, SFX-L PSUs are typically fully or semi modular, allowing you to only use the cables you need. This means you can become an expert at cable management and easily achieve the sleek, tidy PC of your dreams!
be quiet! SFX-L 500W 80 Plus Gold Modular PSU:
- 80 Plus Gold rating
- 500W
- Fully modular
- SFX-L form factor
- Integrated 120mm fan
ASUS ROG Loki 850W 80 Plus Platinum Modular SFX-L PSU:
- 850W
- 80 Plus Platinum rating
- Modular
- SFX-L form factor
TFX:
TFX power supplies are thin, low wattage PSUs that are not widely used for gaming or content creation. However, instead, they are perfect for those looking to create their own mini or home-media PC set-up.
be quiet! 300W 80 Plus Gold TFX 3 PSU:
- 80 Plus Gold Rated
- 300W
- TFX form factor
- Integrated 80mm fan
Building your own gaming PC can be a daunting task. That’s why we’ve put together the Overclockers UK Ultimate PC Building Guide.
Read More in ‘Form Factors Explained’
Want to learn more about your PC hardware? Check out the rest of the articles in our ‘Form Factors Explained’ series!
- 4 min read
Ruth Rowley
Author
Ruth has been with Overclockers UK for over a year and has gone on to write about everything ranging from in-depth hardware guides to monthly game releases.
Outside of writing blog posts, she can be found wrapped in a blanket with her black cat, engrossed in a book or playing life-simulation games such as The Sims, Stardew Valley, and Animal Crossing.
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So my PSU is 180 W and the dimensions are 85mm x 53mm x 200mm, I want to find a PSU w better wattage but the same size roughly
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