It is better to get a fan with good static pressure for your PSU for better cooling performance, as it pushes air with greater force. You can easily find good-quality aftermarket fans online for your PSU. Most of the modern-day ATX PSUs come with 120mm, while smaller form factor SFX and TFX power supplies come with 92mm and 80mm fan respectively. Yes, you can clean out the faulty that has been jammed due to dust and debris, but still, its performance will not be up to the mark and it will certainly make noise at some point in the future. In all these cases, the best solution is to replace the fan with a new one. The fan can become faulty either because it is jammed due to dust, or due to hardware failure that includes worn-out bearings, or because of some component failure in the fan. Faulty FanĪ faulty fan is one of the most common reasons for the ‘PSU Fan not spinning’ problem. However, if the fan does not spin at all at high load, especially when playing heavy demanding games or running benchmarks, then it is a sign of worry and you should take appropriate measures to fix this issue as soon as possible. So, if your PSU does not spin during idle or during low load conditions, and starts spinning at higher loads, then there is nothing to be worried about as this is its normal way of working. Below, you can see the fan curve graphs of some power supplies from different manufacturers that include Corsair, Cooler Master, and Seasonic. For example, in some power supplies, the fan starts spinning at 30% load, for some at 40% load, and for some at 15% load, as it varies with the PSU manufacturer and the amount of cooling required for the particular model of the PSU.
This semi-passive cooling mode is also called Zero RPM mode, Semi-Fanless mode, and 0dB mode, depending on the manufacturer of the PSU.
These high-quality power supplies also come with a very quiet fan that is dead silent, even during full load, and can easily be mistaken for the fact that whether it is spinning or not. In this mode, the fan would remain off or stop spinning under low loads or during idle, and when the load & the temperature of the PSU increases, the fan starts automatically to keep the PSU cool and prevents the components from overheating. Nowadays, most mid-range and high-end PSUs offer semi-passive cooling mode for quieter operation.
Here are various causes with their proper fixes regarding the ‘PSU Fan Not Spinning’ issue, and they apply to all computer power supply units of any form factor or size, and from any brand that includes Corsair, EVGA, Thermaltake, Seasonic, Antec, etc.
Read also: PSU Fan Up or Down? Find out here Why is your PSU Fan is Not Spinning? So, here I am going to list the various causes with their solutions for this ‘PSU Fan Not Spinning’ problem. However, if it is a problem regarding hardware failure, then it is a serious issue and should be resolved as early as possible because you don’t want to fry up your power supply and the other components inside your computer case. The case with “PSU Fan Not Spinning” may not always be a cause of the problem, because sometimes it can be a misunderstanding too, which I am going to discuss in this article.