Psu fan not spinning

Psu fan not spinning. The fan can become faulty either because it is jammed due t May 23, 2012 · My system won't boot and my PSU won't even spin. It is not ramping up with the load its just spinning at 100% or not at all, also it does not ramp back down afterwards I have to shut PSU fan spins only for certain amount of time, then stops, then starts after a while. So it would turn on when PC boots. Jan 18, 2024 · Workaround 1:-. Aug 8, 2020 · Hit the power button, cpu fan lights up and spins then stops, spins then stops forever. This time cpu fan turned on and spin. i5 4460 / 280x. Below that threshold fan doesn't spin at all. The computer will continue to operate normally and will not cause the Mar 12, 2021 · The first thing to do is check the power-supply’s manual to see if it offers a semi-passive cooling mode. If the computer uses more than 15% power from the power supply, the fans in the power supply will was on about 10-27% load. I have had my rig running various benchmarks and never had the fan spin up. Posted December 13, 2016. The computer will continue to operate normally and will not cause the power supply to overheat. I put my ear to each part and noticed it was coming from my PSU and that the fan was not spinning (!) I left the case cover off and powered my PC back up a couple more times; I noticed my PSU fan seems to move for a split second and then gives up. Unless you have been trained in electronics and power supply maintenance and can perform safety Jan 10, 2020 · Corsair Notepad said: That specific PSU has a zero RPM mode and will only spin up the fan when necessary to actively cool the power supply. About 98% of the time when I turn my computer on the fan on my RM1000x does not spin even when I put a lot of load on it. Here are three common reasons: Fan Not Receiving Power. Jun 9, 2013 · Mar 8, 2020. Remove the CPU case and check whether there are any cables preventing your fan from rotating properly. RM750 fan problem. 2. I jumpered the green wire to one of the black wires on the 24 pin main power connector to bring power to the components on the power supply board without having to have it connected to the pc and I replaced the fan with a known good 12V DC 0. Tried a different Lian Li hub. [Continue Reading] Find the Best Nvidia and AMD Graphics Cards for your Gaming PC or Workstation. Feb 28, 2023 · Learn the causes and solutions for PSU fan not spinning problem, such as semi-passive cooling mode, faulty fan, noise, and overheating. Apr 12, 2024 · Turn off the computer. Ribbons : 123. If it never reaches a temperature where the fan needs to turn on, it will remain off. Remove all the wires and storage except for the front panel connector. I would contact Dell and explain the problem. Check the power supply to ensure that it provides sufficient power to the graphics card and that the power cables are securely connected. Just for the record in case someone searched, Seasonic S12III 650 fan should spin when you Mar 4, 2017 · Solution. While this might not be a cause for alarm on its own, when combined with overheating of the CPU it is definitely a red alert. If your power supply is unable to provide 12V and 1. 10. Hey guys, so my Ender 3's PSU fan suddenly stopped working. The fans on a graphics card may not spin if they are not receiving power. I also changed the MB battery and tried turn on with a screw driver directly in the MB pin, and got the same results, nothing happens. It tries to spin and then stops, like I said it happens on simple actions like opening a folder. The fan stopped spinning so it overheated. If we looking at the graph fan should never really be off but if it stays within 50-60C under load it should be fine for sometime. 11. I've tried troubleshooting the issue by checking the connections and making sure that the unit is properly plugged in, but the fan still does not spin. And with a fan that’s custom-designed for low noise operation, it’s We would like to show you a description here but the site won’t allow us. My case fan lights turn on but are not spinning. 1, i am aware that the rm 850 and i think the 750 have thermal issues as i have read on one of the posts here, they have been through a recall due to shutting off before the I just noticed that during a print the motherboard fan is spinning while the PSU fan is not. The fan probably spins only when temps inside the PSU are over a certain threshold or when the power load is high. Apr 25, 2023 · Step-by-Step Guide to Replacing a PSU Fan: Power off your computer and unplug the PSU. But that’s not all. It doesn't spin up until the PSU reaches towards 50 degrees C is what I read. Took out my multi meter and tested the slot for the fan and weirdly enough, it is only showing 7. The PSU is efficient enough at managing its temperature that it just isn’t necessary. Another result of age: a fan’s bearings can start grinding and even stop spinning completely. Should PSU fan be always on? Or does it only kick in when the PSU gets to hot? Feb 22, 2021 · Build Hardware Troubleshooting. Usually, out of the box, the Corsair PSU fan is set to zero RPM mode and won’t start spinning until the PSU reaches a certain temperature. Sometimes you have to think upside down. If the psu do not start, then it's probably dead. Solution. Fan Connectors Jan 4, 2023 · Check Power Supply Connections – Image Credits [Tech4Gamers] If the fan still does not spin, there may be an issue with the power supply or the connections. By Ellis May 9, 2017 in Power Supplies. Apply some lightweight oil to the whole of your GPU fans’ bearings. You can buy a 10-15$ fan off Amazon and hard wire it to PSU. However, my power supply unit. This psu does come with a tester for the 20+4 pin connector (linked below) and i have tested it and it works fine so it’s just when it’s connected to my motherboard. Any advice? That's when the fan isn't running - total system draw isn't enough to reach past the 340w limit. Dec 5, 2016 · CPU: Core i5-6600K. Cooler: Corsair H100i v2. May 21, 2021 · Disclaimer, there is a risk of electric shock when opening a power supply as there could be stored electrical charge even when it is unplugged, do not attemp Turn the PSU back on and turned on. Put the ram in other ram slots, Change the ram (working one), same thing happens. HOWEVER, the start and rest button on the motherboard is lighting up red however none of the fans spin and I can't start the computer up. Nov 2, 2013 · I have the maximus VI formula and have connected everything correctly to it. Nov 24, 2013. The noise level is <16dBA, and is active when PSU output is between 20% and 50% of the rated DC output load. Sep 7, 2020 · LEGACY TOPICS. May 9, 2017 · psu fan is not spinning psu fan is not spinning. When I start my pc, my PSU fan starts Feb 22, 2015 · Power Supplies. I did the cabinet's upside to Down and Problem Solved. Mar 23, 2015 · Mar 23, 2015. This includes the PCIe power connectors usually situated at the top or back of the card, and in some Dec 16, 2023 · Once that's done, plug in the AC power cable and then turn on the PC. It’s quieter than most PSUs when the fan’s not spinning, too. Ive seen issues like this with a lot of people on the internet, but I dont know if this is the same issue like them. The fan is idle, almost all the time. That spin at boot and shutdown is just the fan test, so if that works, the PSU is normal. Since they don’t operate at full blast most of the time, they don’t require a fan Aug 31, 2018 · Aug 31, 2018. Check your power supply for damaged components, such as faulty fans, capacitors, and resistors. Future system design will also include this new power supply style. That’s literally the main selling point of the PSU…. I attached the new PSU to my motherboard and the result is the same. PC turns on fine. May 9, 2021. 3 minutes ago, manikyath said: that said, piece of advice: if your system doesnt draw enough power to make the fan spin up, put the power supply fan side up, that way it can passively vent out the little heat it produces easier. The RMS series from Corsair is the newest one from the company. fan is not spinning because my circle cabinet have smps in upside so i put the Cooler master PSU upside thats why its fan landed on his net and stuck. Re: PSU fan not spinning even under heavy load Saturday, June 13, 2020 12:13 AM ( permalink ) If your PSU has an "ECO switch" " turn it off" . That's absolutely normal. Swapped the connector cable on the daisychain. But there is a fault in your PSU if it doesn’t start spinning even after the heavy tasking and load crossing the 40 percent mark. If Workaround 1 doesn't help, perform the following procedure: Physically check physically if the fan is not spinning or it is a false alarm. Jan 13, 2021 · Jan 13, 2021. Came back 30 mins later and turned it back on. This'll take time and for the sake of your PSU. Power Supplies. abqnm666. So, if your fan is not spinning, that's mean you not give a enough load to your psu to sweat. When powering on, I see CPU fan light turn on for a sec then turn off. The software will scan and detect the connected hardware components, including the PSU fan. If swapping the fan tray with a known good one still does not Jul 5, 2014 · This completely silent mode is feasible due to the extremely high efficiency of these PSUs. That feature is intended to make the PSU quieter so that you won’t get annoyed with Nov 24, 2013 · 20,965. In some cases, the fan might not be properly connected to the power source, or the power cable may be faulty. Many PSU and GPU dont spin the fans unless needed. After 15 seconds, connect the power cable back to the PSU. PSUs may have constantly-on fans or power-usage and/or heat-controlled fans. If you really think there is a problem with the fan maybe you should contact SilverStone and ask them about it. It's normal. Find out if your PSU can work without a fan and when to replace it. now it can be dead psu unit, would not be something one in a million, but still not that common. I have this PSU for some time now, (6+ years) and I noticed recently that the fan is not spinning, not even when I power up the pc. Watch to see if the fan for the power supply unit (PSU) is spinning up when power is applied. I have tried the following: Swapped the fan from a set of three that did work. If you find any, they may need to be replaced. If the computer uses more than 15% power from the power supply, the fans in the power supply will Case Fans will not Spin after Replacing PSU. Built with all Japanese 105°C capacitors, they’re a great choice for high performance PCs where reliability is essential. patreon. I have an EVGA 500 Watt Bronze power supply. 8W then your case fan won’t spin. Hello, When doing the paperclip jumpstart test on my AX750 PSU, a chassis fan is spinning, but not the PSU fan, it starts and stops . Used the stock NZXT fans connected to the Nov 27, 2013 · If you get above 30FPS or you get smooth and fluent gameplay, also create a resolution of 3600 x 2025 and then play the game (s). Disconnect the power cable from the PSU, and wait for 15 seconds. In Cooling Mode, the fan speed and the Jul 16, 2023 · Check That Your Fans Have Power. None of the case fan spin including radiator. Oct 14, 2019 · Posted October 14, 2019. When I booted the PC, the CPU fan started spinning, RGB LEDs lit up on all 4 fans, but none of the case fans were spinning, boot screen didn't display, and top side case power button wouldn't turn off PC (it turned the PC on, though). The Corsair RM650 is fully modular and optimized for silence and high efficiency. This is probably a no-brainer, but I turned on my computer this morning and the internal power supply fan never moves. The Fan worked sometimes when the pc was open, it would start for 5 min (once maybe twice a day, but Feb 14, 2024 · Oil The GPU’s Fan Bearings. But computer worksHelpful? Please support me on Patreon: https://www. Jul 28, 2017 · Use the test button with all the cables removed (besides the wall outlet cable obviously). Dust and Debris Buildup: Explanation: Over time, dust and debris can accumulate inside the PSU, including on the fan blades and in the Oct 21, 2011 · Re: PSU fan not spinning. Nov 6, 2023 · Cause. The fan can become faulty either because it is jammed due t Some PSUs like the EVGA 650 GT 80+gold will shut off it's fan if the temps are low to keep the noise down. This is what happens when you press the power on button. My power supply (Corsair RM850)'s fan isnt spinning. Most high wattage and high efficiency PSUs only turn the fan on when the PSU is above a certain load threshold, usually around 50% for 500W+. I connected case fan directly to PSU molex conenctor, it doesnt spin. So there seems to be a problem with my PSU. Is this Yes. Basically the fan in the power supply unit isn't running. 40% of that PSU should be around 344W. I bought 2 spares. Plugged the fan header directly in to the motherboard. Reply to this topic; Lack of power supply. If you needed to see for yourself, perhaps get a kill-a-watt meter or a UPS with a draw meter and then load the system up under some GPU stress test like 3D mark time spy, then see if you can see the psu fan spin when draw at the PSU is over 340w. Some PSUs like the EVGA 650 GT 80+gold will shut off it's fan if the temps are low to keep the noise down. And when you do push the HXi hard, the thermally controlled fan spins only as fast as it needs to. Nov 29, 2023 · Launch the Diagnostic Software: Once the software is installed, launch it on your computer. Workstation : 13700k @ 5. All the fans spin except the PSU fan. other than this if you cannont power on your psu unit i dont see. The solution for this is to use a lightweight machine oil, and the difference will be immediately noticeable. Feb 8, 2020 · It'll spin if it needs to. This function will reduce the spinning speed of the fan when fewer load is put on it, which could considerably improve your PSU’s lifespan. May 5, 2015 · 80 PLUS Platinum efficiency and Zero RPM Fan Mode mean that at low to medium loads, the fan doesn’t spin at all. The fan will not spinning until the sensor detect heat from psu component. Also no boot/display. I just got back from the store and replaced it with a brand new CORSAIR Jul 21, 2023 · Learn the common reasons behind PSU fan not spinning and how to troubleshoot it on your own. As I read it on the Corsair forums it has nothing to do with PSU load, but temperature. This basically means that your PSU fan isn’t spinning because it simply doesn’t need to. If you’ve had it for 8 years and you’ve had no issues, I bet it’s working just fine. The Fans of this PSU are designed to not spin until the load reaches 40% because of the ECO mode. Nov 5, 2020 · "Faulty Fan"A faulty fan is one of the most common reasons for the ‘PSU Fan not spinning’ problem. There isn't a safe way for you to manually test if the fan works so don't try to open up the PSU to get at the fan. Apr 1, 2017. The fan should spin when you hold that button down. 0 and ATX 3. I tried with Unigine Heaven Benchmark 4. Take the side panel off the case and load up GTA or a benchmark and listen to what is making the noise. Gigabyte make poor quality PSUs. Check by swapping the fan tray with a known good one to check if the issue is actually with the fan tray. I have no clue whether it was spinning before, but I definitely know it isnt spinning at the moment. 5Ghz || Gigabyte Z790 Ultra || MSI Gaming Trio 4090 Shunt || TeamGroup DDR5-7800 @ 7000 || Corsair AX1500i@240V || whole-house loop. If the computer is using 15% or less power from the power supply, the fans in the power supply are designed to shut off to ensure lower noise levels. Mar 24, 2024 · Most of the time, the fans in a modern power supply unit don’t actually spin. Jan 7, 2019. 8 Watts and rated 12 Volts to operate properly. I took out PSU and connected the checker clip on other side of motherboard cable, turned off ECO mode and turned May 5, 2023 · Understanding the type of cooling system used in your power supply unit can help you determine whether the PSU fan not always spinning is a problem or simply a normal function of the semi-passive cooling system. greetings fellow computermabob type people, i have questions that i feel i should ask regarding my psu, its a lovely rm850. There are several fans in a computer, including a PSU (power supply unit) fan, CPU (central processing unit) fan, case/chasis fan, and Jun 13, 2020 · Status: offline. A pro-tip would be to paste some velcro squares on the corners to Jun 30, 2013 · Jun 30, 2013. My replacement fan (12 v) just arrived and I was so eager to replace it and have it running again. Quiet Mode runs the cooling fan at very low RPM, which results in extremely low level audible noise. So if there are any wires getting in the way, the blades can stop spinning. They could tell you whether there is an issue or not. Most models have the fans kick in when a certain amount of power is moving through the unit. You can force the fan on through Corsair Link with my RMi PSU though. Unfortunately, new fans did not work also. May 1, 2020 · Connect the fan BLACK to the SMALLER terminal of the car battery (negative), and the RED of the fan to the larger battery terminal (+). This is normal behavior for this new power supply design - there is nothing wrong with the power supply. A non-working fan could be something as simple as collected dust catching a fan blade, to a lose connection, to malfunctioning control circuitry. It’s built with low-noise capacitors and transformers, and Zero RPM Fan Mode ensures that the fan doesn’t even spin until the power supply is under heavy load. Oct 8, 2023 · Ensure your PC is well-ventilated and that nothing is blocking the fan blades. Hello forum. If the fan still doesn't spin AT ALL and you've checked that the fan is heated up enough and that the fan REALLY didn't spin, it is a problem. lvt said: If your PSU's fan is temperature controlled, the fan has no fixed RPM, its speed will vary depending on the PSU load or temperature. However, its hard to tell unless you get crashing, as to whether its not spinning because load isnt high enough, or because its a broken PSU (quite likely if its gigabyte) 3. The computer will continue to operate normally and will not cause the Jul 1, 2013 · When I power on my pc the fan of my brand new gs700 2013 edition psu starts to spin to full rpm with a quite loud noise and then the fan turns off and gradually comes to a stop. The heavier the load, the more heat they're generating and the faster the fans will spin in order to try and keep it cool. RM1000 fan not spinning Hey, my RM1000 Watt 80 PLUS® Gold Certified fan psu fan doesn't seem to spin. Corsair RMx series power supplies give you extremely tight voltage control, quiet operation, Gold-certified efficiency, and a fully modular cable set. If the integrated self-test LED turns on, then the power supply unit can deliver power to the system board. I replaced my old 500W EVGA PSU with a 850W Corsair PSU and now the case fans do not spin. In that case of the 750W RMx, the fan probably doesn't even need to start spinning until your PC is consuming ~300W. I noticed that the psu fans are not spinning leading to my computer to not boot up or any fans spinning. Decided to flip the PSU back off for a longer period. Again with the new PSU, I tried shorting the green and black wires on the 24-pin connector using a paper clip and the PSU fan started but when I Sep 21, 2023 · How To Fix If Corsair PSU Fan Not Spinning Problem. Perfectly normal. The process last maybe 7-8 seconds. I then turned off my PC again, unplugged the power cord and held the power button down for 10 Sep 18, 2020 · PSU fan (power supply fan) not spinning. or set the initial RPM at a certain level. LOL. The PSU fan does not spin and no lights in the motherboard. Mar 10, 2023 · It is therefore alarming when you notice that your CPU cooling fan is not spinning. CPU and front/rear case fans don't produce much torque. That’s why always buy a PSU fan that starts to spin with low voltage; otherwise, the fan will not spin, and your PSU will overheat. And short the green with any of the black wire using a paper clip. The fan should start and run fast immediately. psu rm850 fan not spinning. thanks for your help. com/roelvandepaarWith thanks & praise Nov 23, 2014 · If desired the fan can be turned off through up to 40% load by a small switch on the front of the casing, which would make the PSU completely silent at lower loads. PSU is CM 650w MWE bronze so what im observing for now is that it tries to start spinning and it doesn't and makes ticking noises , also makes a beeping noise aswell besides the ticking that happens ocasionally when it starts to spin for 5 seconds the noises disappear ! 4 days ago · The release of new Power Supply Unit (PSU) ATX specifications namely ATX 3. Jan 7, 2019 · 10. We would like to show you a description here but the site won’t allow us. It does sound like the power supply is not cooling properly, but it doesn’t sound like it is because of a bad fan. 5A fan (same as the one that came with the power supply) which did not spin either when connected. then the PSU fan should spin if turned on. I understand that it features a "zero-rpm mode", however, it doesn't spin during start up either. Timestamps00:00 - Introduction - What the Problem is00:33 - Demonstration00:43 - Potential Reason 01:00 - Adding a bigger load to no Avail!02:10 - other peop But I think the issue is my PSU. •. Case fans require 1. When your PSU fan isn’t spinning, it’s crucial to identify the underlying cause. . Disconnect the faulty fan, replace it with the new one, and reassemble the PSU. When the Power Supply gets started, they begin with very low energy, about 3 or 3. Run a GPU benchmark and maybe run something on the CPU side up your power usage if it's not super high rated output for your parts it will probably spin up 😁. 1. Hello everybody! I recently purchased the power supply SF450 for my PC build and I've noticed that the fan on the unit is not spinning. I had a EVGA 750 BQ, 80+ BRONZE 750W installed in my system. pwm RPM signal sent to mainboard are only read by any fans you have connected to port 1 on the controller box. It's would be my luck that it would have an internal switch that only uses the fan when needed. See fan curve graphs, fan replacement tips, and fan lubrication methods. my mistake. Monitor is not picking up anything so its staying blank. If you cannot get to a car battery but can get a 6 V large lantern (flashlight) boxy battery, you can do the same test. Is this normal or the the fan supposed to run all the time in this psu? :confused: (the noise doesn't sound healthy) Sep 30, 2020 · I have attempted daisy chaining the 4 case fans power cables into the CHA_FAN1 header. Mar 20, 2022 · If we don't detect and fix the GPU fan not spinning problem early on, it can lead to the serious consequences. Jan 18, 2023 · davandco. And, based on your specs, it's unlikely that you'll see the fan spin very much anyway. 2v. These new power supplies are designed to only spin the fan as needed to conserve overall power usage by the computer. You may need to check the power supply unit (PSU) to see if it is functioning properly or replace any damaged cables or connectors. ) My guess is your just aren't stressing it enough to make the fan come on. Which is a 750W ace power supply unit. Sometimes the PSU is unable to provide enough power to the case fans. You most likely aren't pushing the unit to the point it needs to actually spin up the fan. Jan 4, 2024 · Voltage is another important parameter that we have to check before deciding which fan we should buy. #3. If its that old, i highly recommand u replace it, btw Oct 15, 2019 · To check if the PSU is the culprit, I bought a new PSU - Corsair TX550M. I've also checked the BIOS settings to see if One of the fans on the radiator isn't spinning. Jan 18, 2018 · Isolate the two components like you suggested, then keep a close eye on that. Share More sharing options Followers 0. 3. Several factors can cause the PSU fan to stop spinning. Corsair Product Discussion. This is also true of power supplies. 6 days ago · Reasons for PSU Fan Not Spinning. Most don't really even need the fan at all, but it's just there for safety. That is why getting a good power supply is a must while building a PC. Here are several common reasons behind a non-spinning PSU fan: a. Solution 2: Remove Any Cables in the Way. It spins for a half second then stops. 0 for 15mins and also gaming for 2-3 hrs, did not see it spin even once. Totally normal. It's a Corsair RM850 and I just wanted to make sure this isn't normal. The most straightforward reason for a PSU fan not spinning is the lack of power supply. It's meant to stay off at low to medium loads. Given the age of the machine, that's always a possibility. If you're running games it may spin, as the load is increased, most fans only spin with increased load. You may be due for a new power supply. I have a 1000W Thermaltake PSU and the fan is not spinning at all. Power-cycle the box. Faulty Components: Faulty components can also cause your PSU fan not to spin. It is either off under no load or full throttle under load. If nothing happens and if you are trained to do that (I'm not responsible of any damage in case bad manipulation 😁), disconnect the mainboard power connector. My rig uses somewhere around 300W. It's a RM750 and i would say the problem is fan related. The fan doesn't turn on until the power supply is under a significant load. The spinning behavior of a power supply fan can be influenced by the load on the system. It may be a bad sensor, as suggested by a previous comment. 80 PLUS Gold efficiency reduces Aug 30, 2022 · this is a simple work around if your psu still functions like normal and the only issue is the fan not running if u have warranty then just rma this is if yo If we check Seasonic website the normal running temp is 40C so it should be fine. I touch the back grill and I can feel that it is hot, not hot enough for me to pull my fingers away, but just barely. #2. Learn your way around the EVGA Forums, Rules & limits on new accounts Ultimate Self-Starter Thread For New Members. You have a very low power system. Jan 25, 2024 · it won't run at start before you go in the l-connect3 software and set the MB RPM Sync on, and the PWM connector is plugged in to one of the fan ports. The fan does not spin until it reaches a certain temperature. The LED light should stay on for 3 seconds and then turn off. 2 volts. Jun 29, 2017 · I saw someone on this Forum say that the fan should run at 20% of rated load, but if that is the case I would think it would run most of the time. May 23, 2021 · You can increase or decrease the fan speed and also change up fan modes on your PSU using the Corsair link interface. The cpu fan and gpu fans spin and the computer boots to windows without any issues, just nothing happens with the case fans. 0. If not, it may been the PSU has failed. When doing the paperclip, you aren't drawing anywhere near enough current. Reply. Get Detailed Guides and Information on Computer Components and PC Hardware. If not, warranty time. That power supply automatically turns off the fan when it doesn’t need cooling. Carefully open the PSU casing, following the manufacturer’s guidelines to avoid damaging any components or voiding the warranty. There are times when the fan spins when I turn the computer on and it will keep Jun 8, 2020 · This is often very noticeable for CPU and GPU fans. this is a new PSU that i assembled today with other PC parts. 1 in a very short time has created a lot of confusion among PC …. It spins when it reaches a certain temp. #1. Sep 12, 2023 · Common Reasons for a power supply unit fan not spinning. I am not aware of any other way to make the PSU fan spin except to put the PSU under a load sufficient for the PSU fan to turn-on on its own. It's not going to that while your CPU and GPU are idling. (<100W CPU, less then 200W GPU. Load and fan speed relationship. Power supplies on these select Dell computers have a new feature to ensure that the computer runs as quiet as possible. Dec 13, 2016 · 4. same thing happens. or, your system is to easy to handle with your PSU. After unplug everything, I did the paperclip test, and the PSU fan starts alongside with another fan that I left plugged directly in the PSU. everything is plugged inside pc right yes? specially check front pannel connectors, etc. Cause. Monitor the PSU Fan: Locate the section or tab within the software that provides information about the PSU fan. PSU fan not spinning Question Answered Hi I just noticed that my PSU fan will spin on start up (7-10 seconds) and after PC is fully loaded PSU fan just stops. May 9, 2021 · 7. Certain PSUs have a silent mode operation at low wattages, where the fan won't spin when low amount of power is being used. zx qd lx rg fd hq sk iq he vk