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check if you have a viscous fan hub. If you have it will be that the hub has started working while you were stationary to raise up the fan speed to assist in cooling and when you rev up to take off the increase rpm increases the fan noise and when the air is passing through the radiator the hub cuts out and the fan noise goes.
If this has Smart fan technology on the mobo, it will do this as the fan speed is increasing to compensate for the increase in the temperature of the CPU. You could , if the noise irritates you, purchase a better cooler, one with copper heatpipes and a larger fan..
Electric cooling fan bearing failed and the cooling fan needs to be replaced. Start with inspecting the cooling fan behind the radiator and determine if that is where the noise is coming from. Replace any worn or damaged parts.
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I had a similar problem with excessive fan noise on my Dell Dimension 5150. The solution was to replace the worn heat sync compound that was between the cpu and the heat sync itself. (£0.99 ebay)
Most likely it is the POST throttling up the fan to 100% during boot up. Then it switches over to ACPI(?) power manangement and Windows manages your fan speed to extend battery life.
If it continues, try a can of compressed air, and breifly blow out any debris from the system fan. Bits of paper and critter-fur can get sucked up into the system.
this sounds like the fan is spinning as fast as possible try to put the system in open so it can get air into all the fans if it is in a inclosed space it could over heat the system and fry it just try to leave it in open and maybe put a fan by it to increase cool air to system
Try this remove side cover and boot computer listen for any extra noise fan etc. also by power supply As I think you have a bad bearing in a fan To temp fix it remove paper cover over center of fan and put a small and I mean small drop of light machine oil on bearing then replace paper cover. check if this stops the noise if it does you know which fan to replace. If it is power supply fan and if you think yourself capable remove fan and do the same to it
Yes. This sounds like a fan issue. The noise often comes from bearings failing within the fan. Also, a failing bearing can make things harder on the motor as it brings the fan up to speed. This is likely the reason that you see increased warnings during the fan speed check while booting because it comes to speed more slowly as bearing wear increases.
I give this a 90% chance that your CPU fan is causing the issue. Since a decent CPU fan will cost you ~$20 online, it's not much out of your pocket if you happen to uncover another culprit.
I'll keep an eye on this post. Let me know how things go.
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