Yet I still get an alert: cpu fan not detected when I boot up. While I still believe it is due to a motherboard faiure in the fan control circuit, I learned there is indeed a BIOS setting that will bypass it. If your CPU fan does not spin, the issue could be anywhere from the fan, the motherboard, to the power supply unit. So, as you can see, this is a major issue that you need to address as soon as possible. If we’ve missed any tested method, please share it with us in the comments. I pulled out the GPU and it booted and registered the ram, but it was interrupting the boot and saying that I was getting a "CPU fan error". The fan is a 120mm and I read somewhere else that due to its low speed it doesn't get detected by the mobo. If you have queries regarding this problem or want some guidance, then you can ask your question in the comment section below. I am using windows 10. Also, you don’t have to reinstall Windows or drivers if the CPU fan is not spinning because it is not an operating system or software related issue. Red = + 12 Volts 3. You can click Start -> Power -> Restart to reboot your computer, and check if the CPU fan spins after a reboot. As simple as it sounds, restarting your computer might be the fix for your issue. The resetting of your desktop is due to Explorer.exe crashing. C.P.U fan not detected while booting When I turn on my desktop, it says cpu fan not detected & at the bottom of screen "F1 boot" button appears after pressing that i can log on , I have got windows xp on my computer . System: Windows 10 Home Battery or AC: Model: ROG Strix G512Li Frequency of occurrence: Everyday since 3/1/2021 Reset OS: Screenshot or video: The fan came with my case. He has a special liking for graphics cards and is a passionate PC gamer. The GPU fan not spinning is a frustrating experience and the problem can arise due to different reasons. The solutions are: If the fan isn't spinning: Replace it. I just recently finished my rig and I'm struggling with the CPU fan A LOT. My specs are: If i press the power button, the lights will come on and there will be no response from the monitor. One day, a year ago or so, I got the infamous message that the cpu fan was not detected. Here is an HP forum post from someone with a Pavilion 21 who was having the same problem. For awhile, it would boot sometimes OK, and other times require the F1. Press F1 to boot. This thread is locked. Is this true? PC issues and remove viruses now in 3 easy steps: On some occasions, your PC boots normally, but the CPU cooling system doesn't start. New York Mets legend Tom Seaver dies at 75. My cpu fan problem was a little different. 1. What CPU Cooler are you using? Not sure if the two events are related. When i opened up the case i found out that the cpu fan is not spinning. The fan connected to the Chassis 1 header is working fine and is detected by the fan Xpert software. Are you absolutely sure that the CPU fan is plugged into the receptacle on the motherboard that is marked CPU Fan? The specialist will also check if you have any wires that are preventing the fan from spinning. Also, I did not open up the case at all, changed any hardware, or dropped it. Hi, When I boot the boot stopps and a noter states CPU fan not detected. However, the CPU fan in not outputting anything it just says N/A.. Check the fan wire thoroughly along the length and on the connector and the fan side, where it is soldered to a smaller PCB. If the fan does not spin in other fan headers too then it is damaged or faulty. The wires going into the fan can also get in the way of the fan blades and prevent it from spinning (these fans don’t have a lot of torque). Gman257. Re: Dell precision m6600 cpu fan not spinning Jump to solution After putting the laptop back together to try a bios reset I re-seated the processor and graphics card. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. A technology blog dedicated to graphics cards and PC gaming. When the CPU fan of desktop or laptop does not run, the methods to find the CPU fan and fix or replace it might be different. At this point, if your fan spins like this you would need to replace the entire unit. This may be the problem. If the fan header is fitted and soldered properly and then also it is not getting voltage, then there are a couple of things that you can do. If your CPU fan stops spinning suddenly or is not spinning properly after a BIOS update, then you have to revert to older BIOS because it is an issue with the new BIOS itself. Obviously I checked the back of the desktop and 2 fans are visible. Below you can see the CPU Fan Speed of one of my computers using HWMonitor and HWiNFO software. It's because your motherboard is trying to set the fan speed lower than the fan is capable of spinning at. Note: All CPU fans come with a 4-pin PWM connector, so make sure that the fan you are getting has a PWM connector only. Either make the fan run at full speed all the time or set the minimum speed in BIOS higher. Cleaning your fan is not an easy task if you haven’t done it before. If the pc powers up and does not spontaneously shut down after a whilke, the CPU fan must be spinning... BjornEricsson. If your fan fails to spin at high load then your GPU and even VRAM & VRM will overheat and can throttle down to lower speeds or frequencies card, and in extreme cases, the card can shut down to prevent itself from any … Although, now my R9 380 would not get detected by either Device manager or the AMD driver installation. Press F10 to save changes and exit. Notify me by email when the comment gets approved. Clean the Fan, Air Vent and the Thermal Paste If you notice that the Cooling fan is spinning faster and louder than normal then there maybe dust and other particles clogged inside which makes them function less efficient. If the fan is spinning: Go in the BIOS/UEFI and disable the fan monitor setting. While at 0% the fan shuts off. I have done M.Tech in IT and B.E. Reboot your computer. I went through a period of not using it at all for about of week and then the fan was working again. Also, the main role of the CPU fan is to optimizing the CPU temperature. Well, if the fan's spinning fine, then, either the motherboard sensor isn't working or the fan isn't transmitting the rotational data. I am working on a Dell Dimension 2300. Try asking for a specialist’s help, as this is a very high precision task. Your fan may be running, but not at full speed which it may require. It would be appreciated if anyone could help. I have installed a new cpu fan and shroud. '511-CPU fan not detected' problem 2 years ago I have an HP Pavilion and when I start the thing, it gives me "511-CPU Fan not detected, press F1 to boot" message. At start up, I get a screen with the alert:CPU fan not detected. CPU and Case fans can become slow over time because of dust build and due to worn out bearings. A faulty or broken fan wire is another cause of this CPU Fan Not Spinning problem. WARNING: Make sure nothing enters inside the computer case while it is operating. Upon rebooting the ‘CPU Fan Error’ message appeared with ‘Press F1’. The wires going into the fan can also get in the way of the fan blades and prevent it from spinning (these fans don’t have a lot of torque). Yellow = Tachometer 4. You may also want to reset the BIOS to its default settings by taking out the CMOS battery for few minutes and then putting it back again on the motherboard. 511-CPU fan not detected but fan runs at Max speed continuously - posted in Internal Hardware: I recently bought this HP ProDesk mini desktop … Sent from my iPhone using Tapatalk 11-25-2017 01:25 AM #4. Once on the Monitor tab, set the CPU Fan Speed from N/A (Not available) to IGNORE. CPU Fan Not Working Desktop / Laptop. Akshat Verma is the owner of this technology blog and has more than 15 years of experience in computer hardware field. Cleaning your fan is not an easy task if you haven’t done it before. Not sure if the two events are related. I had massive FPS drops and then saw on predator sense that my GPU heat was sitting around 90 degrees... and then my CPU fan stopped working too lol. If your CPU fan does not spin, the issue could be anywhere from the fan, the motherboard, to the power supply unit. In this case, first, the CPU will underperform because of thermal throttling, and when the temperature of the CPU goes above the rated junction temperature, then your PC will shut down automatically to save the CPU from any damage. However, if you don’t want to spend money on the motherboard, then another thing that you can do is to get a fan controller that comes with a thermal probe. 6. Checked my fans and they were spinning fine, went to UEFI BIOS and only 1 of the 4 fans were detected, the rest said ‘N/A’. Clean the CPU fan. I know changing the fan monitor setting to ‘Ignore’ lets me run the PC but it doesn’t solve the actual problem. You can check a bad CPU fan header by inserting the CPU fan in another fan header, and if it is working, then most likely you have a faulty CPU fan header. Please log in again. If you have an entry-level or budget category motherboard, then in most cases, it will only have a single CPU fan header, and if it is not working, then it is better to replace the motherboard, especially if it is under warranty. You can click Start -> Power -> Restart to reboot your computer, and check if the CPU fan spins after a reboot. Above, you can see that the CPU fan is spinning at 900 to 1000 RPM at a moderate load. The color coding of fan wires is, I believe universal. A faulty fan header is one of the most serious cases of the ‘CPU Fan Not Spinning,’ problem. However, in case of worn out bearings, you have to replace the fans with newer ones as they are not repairable. If the fan is not working or is making a loud noise, the fan … Check out: Best Static Pressure Fans for CPU Heatsink & Radiators. I must have been in the BIOS a dozen times and did not recognize it. Tip 1. Why do I keep getting this when I turn on my desk top? So, it is better to replace a fan that has a bad bearing or has its bearing worn out by too much dust. I can see my cpu fan spinning but when I check in the BIOS or Easytune5 it doesn't show any RPM reading. This is the order of things from Monitor to Motherboard: Monitor > Cable > Port on Computer > which is either connected to a Graphics Card in a slot on the Motherboard or to Onboard Graphics Hardware which is part of the Motherboard. Understanding this, means that it may not be overheating (especially if you wait a while before trying to start it again), but you do have a problem with the computer. However fans on headers 2 and 3, whilst reporting their speed and also seem to spinning up and down depending on load, seem to not be detected - I.E, I cannot control their curves as they do not appear in that section of the software. Commented: 2006-11-26. I love Graphics Cards and I have been digging them since GeForce 3 series. You can check and monitor CPU fan speed by using good third-party hardware information programs like HWMonitor and HWiNFO. 13 years ago In reply to CPU fan not spinning it is by no means unusual for the CPU fans to die, especially if it is dusty. The fan can get clogged with dust and lint hence preventing it from spinning. The specialist will also check if you have any wires that are preventing the fan from spinning. Various causes can make your CPU fan to stop spinning, and most of the causes are related to a hardware fault only. Small towns see rents increase amid city exodus. After logging in you can close it and return to this page. If you meet problems in your Windows computer, restarting computer sometimes always wins this battle. I put them back in, booted up, and every time it boots I get 511-CPU Fan Not Detected and 512 Chassis Fan Not Detected. In this, the fan header is not receiving the voltage from the motherboard, or it can have a loose connection to the motherboard due to bad soldering. Do not perform this step while children or pets are nearby. If the problems are more serious and require hardware replacement, keep reading for useful suggestions. Below are some of the causes and solutions for this ‘CPU Fan Spinning Slow’ problem. If your CPU heatsink originally comes with a fan that spins at lower RPM, then you can replace the fan with a higher RPM fan that has a higher static pressure rating and also good airflow rating. Its' fans are spinning and the lights are on, but even the GPUs display- and HDMI port don't work. I get the 511 cpu fan not detected and press F1, yet when the computer boots up, the fan is running. Look inside to make sure the fan is spinning and is not making noise. If your fan is faulty, then the only solution is to replace it with a similar fan or with the fan that is optimized for static pressure and spins at the same or higher speed compared to the older CPU Fan. A jammed or faulty bearing due to dust and debris can also cause your CPU fan to stop spinning. If the fan blades do not move or resist movement, replace the fan. Here, you can clean the fan by blowing air to it using compressed air can or using a electric duster/blower and can make it free again. Here, you can attach the thermal probe to the CPU heatsink and plug the CPU fan in the fan controller for the fan to spin according to the fan curve of the fan controller. Always keep in mind to always ask for a specialist’s help when trying to repair such issues. Causes might include dust in the fan or issues with the motherboard, as explained below. The GPU fan not spinning is a frustrating experience and the problem can arise due to different reasons. After a few months, I took off the side panel to watch the fan. Cleaning the fans is easy and is one of the first things you should do. Your CPU fan serves the purpose of cooling the machine by spinning quietly in the background. Hello sir my cpu and GPU temperature is going to 70 to 78 but some time CPU goes to 80 is it good temperature and plzz tell me the dangerous temp of CPU and GPU I have stock CPU cooler, I have i5 4590 4th gen 8gb ram gtx 1050 500gb hdd. One common problem that first-time builders can run into is that, after building their system and turning it on for the first time, they find that their graphics card fan(s) isn’t spinning. I have installed a new cpu fan and shroud. Also, I did not open up the case at all, changed any hardware, or dropped it. The bios said "n/a" on the CPU fan. This message just seemed to appear. If the PC suddenly stops after booting, is an outcome of your processor fan not working. Your fan may be running, but not at full speed which it may require. If you haven’t replaced your CPU or motherboard before, always ask for a specialist’s help because this is not a simple fix to do by yourself. I made sure to properly seat the GPU in the PCI-E slot, and use a 6+2 Pin to power it. So before replacing your motherboard or CPU, try replacing your power supply first. im guessing you might have connected your cpu fan into one of the case fan slots on the motherboard, so that the actual cpu fan slot is still empty on the motherboard, and therefore it is screaming that you dont have a cpu fan connected. Oct 15, 2017 at 05:00 PM darkilluxion - Oct 15, 2017 at 05:00 PM darkilluxion Oct... Or vote as helpful, but not at full speed which it may require this! Restarting your computer consider replacing your motherboard is trying to set the or. Turn on my desk top 6+2 Pin to power it, then you can follow question. 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