Fan size is closely related to airflow, in that larger fans will push more air than smaller ones while running at the same RPM. Alternatively, try searching the fan manufacturer's web site for specifications. 120mm case fans tend to be the most popular size of fans in modern PC cases, but you will find many sizes such as 80mm, 92mm, 140mm, 200mm and beyond. The computer parts store had several fans being demonstrated, so I could compare the flow rate. Unfortunately, my power supply fan gave neither, so I picked one based on the wind output (felt by hand). The cooling capacity is decided by the flow rate in CFM which is c ubic f eet of air moved per m inute (can be approximated by RPM) of the fan. Best of all, a 200mm fan, 250mm case fan or one of our other super-sizes will dramatically lower your temp and allow you some well-deserved sleep (unless you're too amped up. Ideal for side panels, 250mm fans provide intense airflow at low fan speeds, creating less noise. I picked the replacement based on its noise rating as well. You're going to want to prep your PC case for a 250mm fan from. You can usually use a regular PC case fan here. The voltage and current ratings are written on the label. My fan was the 80mm (8cm) type, meaning it is 80mm by 80mm. You need to make sure it will fit inside your power supply, so get one with the same dimensions (or as near as possible DIYers can usually file away the excess bits -)) Also, we work with the industry’s leading manufacturers to bring you high-quality fans from companies such as Delta, Evercool, Everflow, Nidec, Sunon as well as our own proprietary Coolerguys fans. Further, you have to make sure it is powerful enough to cool the power supply. We carry cooling fans for in any size you may require, from 25mm to 360mm fans. You have to consider the size, and voltage and current ratings. Thanks to KanyonKris for the correction (see comment at bottom)īuy or salvage a fan that closely matches the existing one. : Corrected explanation of fan dimensions. Also, fiddling with the insides may damage other components, so go ahead only if you are sure of yourself. Opening your PC may void its warranty, though I haven't come across such a computer so far. Please proceed only if you know what you are doing.ĭisassembling the power supply will void its warranty. The size of the fan you want will usually be determined by the size of the fan fitting position in your computer case it is easy to measure pc fan size.
Capacitors on the line side usually retain their full charge even when unplugged, and can inflict a painful or even lethal shock. Power supplies have dangerous voltages inside, even when completely disconnected. In my case, I decided to replace the fan because my cheap power supply's fan started making enough noise to drive me to distraction.
You may want to do this because the fan is defective, or to install a different type of fan, for example, an illuminated one.
This Instructable describes how to replace the fan inside a standard PC power supply.