Optiplex 745 fan runs fast. The processor fan on towards the front of the machine that circulates air throughout the tower, slowly revs up until it's going full Aug 26, 2017 · Hi everyone! Since yesterday, all three of my case fans have been running constantly at full speed even when the CPU is idle and registering no temperatures above 30°C (see image). com. I've removed the CMOS battery and turned it on without it, same 6 beeps. I’ve since installed 8GB ram and added an R7 250 2GB card - this is a curiosity project to see what I can do with the old girl Get the best deals for 745 Optiplex Fan at eBay. I’ve updated the BIOS to what Dell had on-line - A13. 39GHz,the result is ok,the only problem is the alert of rear fan failure but my optiplex 745 fan running in normal except the fan of my CPU. Run system diagnostics paying attention to the CPU fan results. After installing the sdd and ram upgrades, however, the disappointment was great. Found an old Optiplex 745 in my attic covered in cobwebs and whatever else. DellTM OptiPlexTM 745 User's Guide LegacySelect Technology Control System Setup Manageability Booting to a USB Device Physical Security Jumper Settings Trusted Platform Module (TPM) Clearing Forgotten Passwords Security Management Software Clearing CMOS Settings Computer Tracking Software Hyper-Threading and Dual-Core Technology About Smart Cards and Fingerprint Readers Power Management Jul 24, 2025 · Learn how to identify if the power supply unit of a Dell desktop is working. 2 NVMe 256GB Toshiba ssd. Nothing on display. My issue is the following. The following article is specific to the OptiPlex desktops. My Optiplex 780SFF fan constantly runs at full speed. Sep 24, 2013 · Page 1 of 2 - Dell Optiplex 745 won't start - posted in Internal Hardware: Hi, can anyone help me please on this. Apr 21, 2025 · Laptop cooling systems rely on fans to maintain optimal temperatures, but a fan that won’t stop running can be both annoying and concerning. Apr 21, 2010 · I don't know about the SMT's or Minitowers, but the Optiplex 745 USFF PC's I've come across seem to last alot longer than the GX620 equivalents, if for nothing else because the majority came with 1. The sensor measures the temperature of the air pulled into the system and adjusts the system fans accordingly. 8ghz Yonah series processors, which run cold to the touch unless under full load. Jan 28, 2009 · Hi there. Apr 19, 2024 · Stop the constant fan noise on your Dell laptop with our troubleshooting steps and preventive measures. I've left it unplugged and then put A helpful guide to what causes PC fan revving, how to determine the cause, and how to stop it. No patterns as to when or while doing what - absolutely random. Of course it is just as easy to replace the fan, assuming that the fan is the problem. After years of good experience with various Dell Optiplex tiny 1L sized models I received my new 7010 micro plus. I have a dell optiplex 745. This test typically takes an hour or more and requires you to answer questions periodically. May 16, 2013 · New to the forum. Upgrades including: CPU Graphics Card RAM May 30, 2009 · The only thing that has seemed to work and this works about 3% of the time is wiggling around the green box in the top back of the computer that has a fan in it, other then that all that happens when I turn it on is an orange light and the fan is super loud, unless it actually starts up. changed power supply, cleaned rams, and unplugged all accessories , changed Jan 26, 2022 · When power cable plugged to my Dell Optiplex 7070 SFF, the fan runs with full speed with huge noise. Feb 29, 2020 · Recently upgraded an optiplex 7010 sff system for someone, temperature and stress tested and everything was fine. one day when i start my pc. Jul 22, 2020 · I have a tbit h81 motherboard an intel i7 4790 It seems that my fan is running at full speed the hole time even when im doing nothing my idle temp is under 30 celsuis it worked in my other pc-the cpu cooler/fan-and I dont know what is wrong it is also plugged in the cpu fan header Here is my 17 votes, 16 comments. The power light briefly organge, then white, then o Jun 18, 2007 · Rotate the fan in the opposite direction from that indicated by the arrow on the back panel of the fan. In this comprehensive guide, we will explore the reasons your Dell laptop fan may be Is your personal computer overheating or your laptop running hot and shutting down? Learn the causes of laptop overheating, how to prevent an overheating laptop, and steps to fix a computer that overheated and shut down. . I haven't figured out the herementioned thermal options Jun 15, 2017 · My cpu fan constantly changes speeds, going up and down every 5-10sec, even when not playing games or doing anything. 40GHz 2. All 3 of these run from the CPU header and are linked with a splitter cable. Dell Fan Failure Fix/BypassFix fan failure on dell computer. Enter your service tag for tailored support articles. Mar 18, 2019 · I have a optiplex 7020 sff, it now has a 2nd hdd, runs a gtx 1050ti on a x4 Pcie slot and has an upgraded cpu to 4790K from i3 4th gen. Find steps to troubleshoot issues with power supply units and running a self-test diagnostic on the power supply unit. I have W7 installed and am getting idle temps of mid to high 30's celcius. When testing to see if it worked, it turned on immediately, fans whirring, but no display is sent to the screen. When I had the I5,the CPU Fan was increasing the RPM in full load,spinning the fan fast enough and my temps were Sep 16, 2015 · So, any fix for this or should I look into getting new psu? As foon as the pc starts up the fans start going full power and never stop. Logs in BIOS show the following error: “Previous Run Express Test first to increase the possibility of tracing the problem quickly. Aug 10, 2009 · I installed SpeedFan on another 745 and found that the hard drive temperature hovers around 51 degrees Celsius which seems pretty hot. While it’s easy to dismiss this as an inconvenience, understanding the underlying causes and potential solutions is essential for maintaining your device’s performance and longevity. it seems your laptop is running under heavy load. I went away on vacation for 10 days and shut my computer down, came home and now it won't start up. It lists the diagnostic LEDs and Beeps that are built into them for diagnostic use during a No POST situation. g. The case fan too. Right?? With my Optiplex 9020 MT, the fans will only run at medium because temps never get high enough to step up the fan speed, which at medium is 1000 RPM for the CPU fan and 1200 RPM for the system fan. We also have some Optiplex GX260s around here, and it seems like they run a lot cooler. I have an issue with my Optiplex 745. ALERT:F1 TO CONTINUE OR Apr 3, 2019 · I have a Dell Optiplex 7050 SFF PC at work. I have recently purchased a Dell Optiplex 760 SFF. Recently, when the power button is pushed, the fan runs continually and is very loud. Jan 12, 2007 · I recently got 2 Optiplex GX620 SFF (Small Form Factor) units. 1", but cannot seem to clear the errors. 99 Shipping! Brand New Dell (JT782) Fan/Heatsink Dell OEM Optiplex GX620 745 755 Destop USFF Case Cooling Fan Assembly - Laptops. I've tried everything like, starting up Jan 15, 2017 · This may seem as a useless idea to do but, What would be the best/all the possible upgrades to do on a Dell OptiPlex 745 Mini Tower? Any Cost. What are my real options to get rid of the noise? Standard fans will not fit due to different connectors, plus the size is very small for a passive cooler. My temperatures are good and I removed the dust from my PC and the fan is still running fast. when i push the on button the cpu fan goes on maximum speed at start up,but it will back to normal after the start up. There is a plug near the rear side of the board for a fan, so I plugged in a Dell Optiplex (front) fan, and of course the fan failure alert went away. I have upgraded two 745's to Core 2 Quads (Q6600), so I thought I would stick a 745 motherboard, HP962, in one of the GX620 cases and see if I could get that up to a Quad. Sep 18, 2007 · Yesterday one of our Optiplex 745's decided to start acting up. Dec 14, 2024 · The computer has been working well. The primary function of a laptop fan is to dissipate heat generated by the internal components of the laptop, particularly the CPU (Central Processing Unit) and GPU (Graphics Processing Unit). Download and install the latest drivers, firmware and software for Windows devices. They adjust their speed based on the system’s Mar 3, 2023 · My fans are running at max speed constantly, I know I need to change the rpm in the BIOS, but I don't know where the settings to adjust the fans are. with canned air and check that the heat sink (Caution: HOT!) retaining screws are properly Oct 26, 2013 · Is there any fan for a low profile optiplex 745? Cause my current fan is loud as a nuke. Oct 11, 2017 · Hello everyone. I pulled out the CMOS battery and put it back in and reset the jumper, but still nothing. The machine runs fine until it does something heavy on CPU - like for example video processing or bulk compiling and then the CPU fan powers up. the orange light on in Jan 11, 2022 · 6 months ago,I've bought a Dell 7010 SFF with I5 3470,16 GB RAM and GTX 1050Ti and last week I decided to buy an I7 3770. None Buy DELL Wk888 Fan Assembly For Optiplex 745 with fast shipping and top-rated customer service. Oct 5, 2024 · Do this if your computer fan is running at high speed all time. Jul 12, 2020 · Optiplex 780SFF fan control issue. Get drivers and downloads for your OptiPlex 745. Recognizing Normal and Abnormal Fan Behavior Under normal circumstances, laptop fans operate dynamically. A few days ago, the processor fan (front) kicked on full blast from POST into Windows, and it stays on high 100%. Aug 23, 2020 · Hi, Recently my CPU fan speeds up like crazy when Windows starts. Restart the system and at the Dell splash screen start tapping F12. Please view the photos for what you will receive. I myself cannot replicate the problem while computer in my possession for the last couple of days, but the user insists. It's booting from a M. I have just installed a Noctua nh-l12s and yes the top Oct 5, 2024 · If the Windows laptop fan keeps running constantly, clean the dust and air vents, stop background apps, and change the system cooling policy. Lift to remove the fan and its back panel from the hard drive bracket. Custom Test Tests a specific device. then it shuts offwhen you turn it on with the power button the fans run hard again for about 5 seconds and it normalizes. This feels a bit hot to me and also the case fan runs at full speed the whole time. May 16, 2013 · Dell Optiplex 745 system includes an air temperature sensor built into the control panel of the system. Get relief from the fan running constantly. This seems to be a common problem, but with many variations. Because it takes the fan a considerable amount of time to spin up/spin down to each setpoint, the fan effectively runs at 2300 RPM with minimal change in noise level. Dell Computer Fan Speed Problem || How to Control Computer Fan Speed || CPU Fan Speed || Dell PC Fan Technical Mind 5. In this post, you’ll discover quick fixes to help you troubleshoot the issue and restore your laptop’s performance. I I really don't know much about computers or the specs. The lights on the mobo works, the fans, my harddrive, the fan of the PSU, the fans of my GPU. I've installed the I7,everything was great,except the temps. it's just setting the lower PL1 power and higher thermal control temperature to reduce fan noise. Jun 20, 2025 · This article takes you through the beep codes for the Dell Inspiron, Vostro, OptiPlex, and XPS desktop computers. Feb 3, 2025 · There is a system fan red 4 pin connector on my motherboard. After shutdown the OS, the fan runs with full speed again till I unplug the power cable. 3. I plugged a front case fan in and it runs slowly. Reply reply ITProSource • Jun 15, 2025 · Your PC’s fan is designed to keep your computer cool, but what are you supposed to do when it never stops running? We’re going to dive into this handy guide covering why your PC fan runs constantly, if it’s even a problem at all, and how to fix it before it causes any damage to your hardware. May 15, 2018 · Ok so here’s the deal. Jul 11, 2008 · I've received several complaints by people concerning the Optiplex GX620 Fan speeds. Jan 2, 2015 · I have a Dell Optiplex 755. It has an Intel i5 7500, 8GB DDR4 ram and no Gpu. How to Fix Overheating and Fan Issues on Your Dell PC Is your PC overheating, or are the fans not working properly? This video will guide you through simple troubleshooting steps to resolve Mar 18, 2025 · If you own a Dell laptop, you may have encountered a perplexing problem: the fan is running loudly and seemingly constantly. The computer does not post. 35K subscribers Subscribe Dec 21, 2013 · Hello, Quick question, I am building a PC and since I went intel I am a little short on cash so I am currently on a optiplex at the moment for now just for the next month or so while I prepare to purchase 2500k, cooler and some ram to get up and running; my question is about the dell optiplex, I the caps are good quality. However a few weeks later they're having problems with a "rear fan failure" error message happening on boot. Thing's I've tried is to turn it on without RAM and without HDD and without USB, same 6 beeps. i think you need to find the app with highest CPU usage with task manager. Neither widows updates (win11), nor drivers or bios update brought even a hint of improvement. (Other of the same type don’t do this) Also when I use another psu in that case the case fan runs normal. Hey Guys Sourav Dutta Here And Today i am Going To Show you How To Fix Computer Not Booting Up Only Fan Running No Display Problem If you like the video, don View and Download Dell OptiPlex 745 user manual online. Jan 13, 2013 · I recently bought two OptiPlex 745s off of Craigslist and one works perfectly but on one of them it worked, I messed around in BIOS (reset to default) and now it displays solid amber light and CPU fan maxes out. Dell Optiplex 745 Small Form Factor Troubleshooting Released in 2006, these computers are highly sought after for their dependability. I cannot stand the noise, how to solve it ? 1 Year Warranty + $5. User claims the CPU fan spins too loud occasionally. Sep 30, 2021 · [Dell Optiplex 7050 sff] Cpu fan runs at full speed after system shuts down I have a dell optiplex 7050 sff at work. The CPU needs a fan to cool down the processor. It usually means that your computer is overheating, and there are actually a variety of reasons why this might be the case. Jun 17, 2007 · I have flashed the BIOS to the latest version "OptiPlex 745, 2. I have checked the fan settings in the BIOS and all looks normal. I have tried everything, what do you think is the reason for this problem? What percentage of CMOS battery can solve this problem now? Just check by installing a new CMOS Mar 31, 2010 · What form factor of 745 (mini-tower, desktop, small form, ultra-small)? The smaller it is, the more likely the fans will run more often, so are you sure this is "abnormal" behavior? You may want to power off and unplug, open the case and clean out all the dust bunnies from vents, fans, heat sink, etc. I’ve tried removing the CMOS, reseating the processor and RAM, even applied some new thermal grease to the processor…no luck. Mar 7, 2008 · (Optiplex 745 motherboard into Optiplex210 minitower case and CPU FAN revs at Fullspeed) If someone could give me the Dell CPU FAN part number for Optiplex 745 minitower case please. However, once this happens the fan never stop repeatedly powering up and powering down again. I have about 10 GX620's in my corporate workshop. i have put everything back together and all od a sudden when i turn on the computer it says alert ! air temperature sensor not detected Jul 9, 2018 · Hi, I have the same problem with Dell T3400 PC. OptiPlex 745 desktop pdf manual download. If it isn't turning on and the fans are kicking up that fast, sounds like a blown motherboard or a bad PSU. Jul 15, 2011 · I've got a few Dell Optiplex 745 USFF machines that wont start properly on a morning, during the boot up process they throw a 'Hard drive fan failure, press F1 to continue' message. Thankfully, there are solutions Jul 2, 2011 · i inserted this processor. It runs faster when the temperature of the CPU increases. Turned on the psu outside the case with a clip and it goes full power too. Item powers on, beeps, and fan and lights come on. It is loading windows 7 very slowly, but I got the ALERT! Air temperature sensor not found on startup and the fan is running pretty fast. Extended Test Performs a thorough check of devices. DELL Hard Drive Blower Fan Plus Hard Drive Bracket and Fan Caddy for OptiPlex 760 / 740 / 745 / 755 SFF & Dimension 5200c SFF Dell Part Numbers: NY290, TJ160, NH645, NJ793 DellTM OptiPlexTM 745 User's Guide LegacySelect Technology Control System Setup Manageability Booting to a USB Device Physical Security Jumper Settings Trusted Platform Module (TPM) Clearing Forgotten Passwords Security Management Software Clearing CMOS Settings Computer Tracking Software Hyper-Threading and Dual-Core Technology About Smart Cards and Fingerprint Readers Power Management Dec 29, 2021 · This OptiPlex 745 has been out of use for a number of years. 2 days ago · This article provides information about how to troubleshoot and fix issues if the computer fan is not working, the fan noise is loud, the fan is spinning slowly, and so on. We have a great online selection at the lowest prices with Fast & Free shipping on many items! May 27, 2017 · Hi there, I have a problem with my optiplex 745, it is not giving display, and when i turn it on it shows a still orange light on power button, and 1 2 3 lights that usually blink when computer turns on, are not even turning on, and fun runs at high speed, cd rom is working fine, I have tried various solution, e. Inventory Location: 21K-AKR Inventory ID: O11736 Rack: 26 Aug 4, 2020 · For example, I set the EC to switch between the 1000 RPM setting and 5200 RPM setting every three seconds. Running hardware diagnostics right now…any ideas on what happened or how I can fix it In this video I walk you through taking apart and turning the cpu fan around so your computer stays cooler. if anyone still has this model reverse the cooling fan. Very nicely packaged systems. The motherboard utility I've been using to adjust fan speeds doesn't take effect anymore. Even when Jun 26, 2019 · Hello. I've analyzed the systems and it seems that bios has no controll over the fan speeds, so the fans spin out very Dec 17, 2019 · Quick Google and turns out 6 beeps in Optiplex 745 means RAM failure. Item: Dell Optiplex 745 Desktop Computer Model: DCSM w Windows XP Home Edition COA. Lights on back suggest video card, a & c are amber, b & d are green. I have managed to find a fan that the system believe is a standard Dell fan (Thermalright TL9015 that I had leftover from a cooler I used). It will run fine (with solid green power button) for about 10 minutes or so and then completely shut down by itself and then flash amber on the power Hi, I own mostly Dell laptops, monitors and I have just recently acquired an Optiplex 7040 Micro with i7-6700T. We work in an open space the Jul 28, 2009 · I got a replacement motherboard for a failed GX620 and cannot clear a message that appears in BIOS POST. It has an Intel i5 7500, 8GB DDR4 ram and no dedicated GPU. May 16, 2013 · hello i have done a dell optiplex 745 in a dell xps 700 case. You can customize the tests you want to run. After an hour or messing about I managed to get it to boot up. 6/1. So is there any quiet fan for low profile optiplex 745? Jun 21, 2024 · The Ins and Outs of Laptop Fan Operation Laptop fans play a crucial role in maintaining optimal system temperatures. The problem follows the psu. Are you hearing any beeps or see any blinking lights? Also is it possible to return to the shop and have the Oct 17, 2021 · When your computer's fan starts running continuously, it can be pretty worrisome. To effectively address a constantly running fan, it’s important to distinguish between normal and problematic fan behavior. This will work on most Dell Optiplex SFF small fo Jul 24, 2024 · If your laptop fan is constantly running, your PC may be infected with a virus and may be at risk. I like them a lot and have recently tried a processor upgrade to the 65nm Presler D 915 dual core cpu The case fan is a 80mm Arctic F8 and the case fan is OEM. After pressed the power button to start OS, the fan become normal. The HDD is indeed spinning though. The system runs fast for my needs but… 1 Year Warranty + $5. From what I could gather The sound of my optiplex with the 140 mm fan at full speed, not too bad since the fan never increases its speed because the machine doesn't get that much hot Sounds like a hardware issue. We bought multiple Optiplex 7060 with the core i7-8700 and when the developers build something the fan suddenly starts to spin to the max and make a lot of noise. The orange light in my PC's power button is steady. I replaced the CPU, upgrading from Core 2duo to Xeon X3363, working flawlessly and improving performace, yet as soon as It boots, fan goes crazy. Fan failure on dell computerBypass fan failure on dell computerDell raid controller battery: http Dell OptiPlex 745 Fan Problems Lockups and Software Problems The computer does not start up The computer stops responding A program stops responding Check th Access self-help articles, troubleshooting guides, how-tos, and FAQs for your OptiPlex 745. Basically the fan is always running, at a high RPM, much higher than it actually needs. This seems odd, as there is no rear fan on the SFF box (at least not mine). i see a lots of videos on replacing the caps but no videos on simply revers Sep 8, 2011 · Hey all, Optiplex 330, has been working fine for a year or so. Solving Problems: Dell OptiPlex 745 User's Guide Check the cable connections — Ensure that the card fan cable is connected firmly to the card fan connector on the system board (see the appropriate "System Board Components" section for your computer). Their fans tend to run at high-speed more frequently as well, which seems to help. I've looked for answers and never have found a reliable one. But my pc does not want to go in bios or even start up windows. You need to run a scan to address any issues. The cpu fan was already clearly audible in idle. The other day, the optiplex had a little issue, it wouldn't boot even though the power led on the case was white, the cpu fan was just running May 5, 2020 · OP said "fans runs very hard for about 8 seconds. Whether it’s checking for dust Aug 26, 2020 · Since today all of a sudden my PC won't boot anymore. " fan running hard is a subjective observation. So everything that has to work still works. I have tried new PSU and messed with the RAM a little bit. It may indicate that your laptop is overheating or struggling to manage resources effectively. The only changes you can make to the fan speeds with software is to increase the fan speed to 4500 RPM for the CPU fan and 2600 RPM for the system fan. May 29, 2013 · Dell OptiPlex 7010, few months old, Windows 7 Pro. Im using that fan as the CPU cooler while also running the front case fan and an additional 40mm Noctua fan as an exhaust. Once you know, you Newegg! Jun 21, 2015 · I'm getting an alert when I boot up that says rear fan failure on my dell optiplex 745, but the fan is working. Has anyone ever Jan 22, 2016 · I am done with the fan noise produced with the tiny and - super loud blower found in the Optiplex Micro. The message is: "Alert! Hard Drive Fan Failure" "F1 to continue - F2 to Enter Setup" Oct 27, 2022 · I need some help controlling the CPU cooling fan speed on my Dell Optiplex 7050 Micro. in that case, the quite mode doesn't help the quite mode is technically the same as performance mode . Also, the diagnostics lights 2 & 4 are s Jun 24, 2008 · Fan runs ridiculously fast in OptiPlex GX280 Hi, I know that there are many many post in the Dell forums about GX280's having very loud fans, but I just wanted to check and see if anybody may know if there is a fix for this particular issue. I've swapped RAM and tested it in all those 4 slots, still won't boot or show display. Has anyone got any ideas? Feb 22, 2019 · That system is around 10 years old and very possibly a bad CPU fan. A solid orange light appeared on the power button and the motherboard. Only the orange light is on in the power button, or just the CD-ROM is running nothing else, and the fan is very loud. At first i thought I screwed up something, but then i Jan 26, 2022 · When power cable plugged to my Dell Optiplex 7070 SFF, the fan runs with full speed with huge noise. 99 Shipping! Refurbished Dell (G958P) Fan/Heatsink Dell OEM Optiplex 380 745 755 760 780 SFF Front Case Fan Assembly - G Laptops. In BIOS and before it gets to Windows it is normal speed. Turn it on, light says solid green and fan runs like crazy. If anyone is still running a batch of Optiplex 745 SFFs, call up your Dell rep if all of them are missing the blue fan that… Jan 21, 2025 · Understanding Laptop Fans Before diving into the potential reasons for a constantly running laptop fan, it’s important to understand its role. Nov 15, 2023 · Why orange light is coming and fan is spinning too fast with 1&2 sir my dell optiplex 780 orange light is there and fan is spinning too fast and 1 &2 showing Answer this question I have this problem too Is this a good question? Feb 26, 2015 · However, it seems to have screwed up the CPU fan device driver somehow. intel (R)core (TM)2 CPU 6600@2. I've not used it for a couple of months and now it doesn't boot – the power light and fans cycle up and down. It's quite loud and I feel it's unnecessarily drawing more power when it doesn't need to. Oct 20, 2010 · Mine is a XPS Gen 4. How do I adjust the fan speed? I don't see any system temperature that controls it. So far so good. So, from what I'm reading here going to remove and then put back in the video card. The hard drive runs at a similar temp as the cores so I'm not sure its just a case of thermal paste replace. The error started straight away after I put a new CPU into my pc. I have around 7 pcs with this Dell optiplex sff CPU hot, fan running loud I had this Optiplex7020 SFF for about a year, it used to run quiet and at a cool temp when using only a browser. dnxfpknbdha2phfkdraakeqa9gi9mfqxbovvvj8lbpgnioeqfc