CPU Fan

Did you use thermal paste? It is obviously overheating, check your temps with hwmonitor.

Could be a problem with the motherboard!

The fan motor is a transducer. If the power supply sends noise to it, you will hear the noise. It is not high fi but can replay the sounds sent to it. One posibility is the PSU has ripple on 12v supply and cound be on the way to fail. The noise Could also fool the speed detection circuit. It is a possibility.

Is it possible that a wire is interfering with the spinning of the fan on the cooler?

I did use thermal paste, as instructed , my CPU temp is 42C always remained at that temp, from start up to shut down (doesn't change) even before i replaced the fan with another, which is interesting and there is no performance problems at all or errors except for the error 3700;011B incorrect fan speed error (CPU fan on/off test only - RPM is fine, passed) when doing a Dell diagnostic. I have been using Speccy for a while now to check temp etc and recently installed HW monitor, but still says 42C. (107F). If it is the motherboard , which is a Dell one as described above, and if I have to install another Mobo, what would be a decent one that I could use that would be compatible with the Dell Inspiron 518 Case. I would like to keep the case and reuse my PSU, Video card, memory (DDR2- PC-6400), etc. in to the new Mobo, though its a Dell Case. Any advice or recommendations would be appreciated Thank You.

I would like to keep the case and reuse my PSU, Video card, memory (DDR2- PC-6400), etc. in to the new Mobo, though its a Dell Case. Any advice or recommendations would be appreciated Thank You.

See post above. Check PSU.

I did use thermal paste, as instructed , my CPU temp is 42C always remained at that temp, from start up to shut down (doesn't change) even before i replaced the fan with another, which is interesting and there is no performance problems at all or errors except for the error 3700;011B incorrect fan speed error (CPU fan on/off test only - RPM is fine, passed) when doing a Dell diagnostic. I have been using Speccy for a while now to check temp etc and recently installed HW monitor, but still says 42C. (107F). If it is the motherboard , which is a Dell one as described above, and if I have to install another Mobo, what would be a decent one that I could use that would be compatible with the Dell Inspiron 518 Case. I would like to keep the case and reuse my PSU, Video card, memory (DDR2- PC-6400), etc. in to the new Mobo, though its a Dell Case. Any advice or recommendations would be appreciated Thank You.

I did use thermal paste, as instructed , my CPU temp is 42C always remained at that temp, from start up to shut down (doesn't change) even before i replaced the fan with another, which is interesting and there is no performance problems at all or errors except for the error 3700;011B incorrect fan speed error (CPU fan on/off test only - RPM is fine, passed) when doing a Dell diagnostic. I have been using Speccy for a while now to check temp etc and recently installed HW monitor, but still says 42C. (107F). If it is the motherboard , which is a Dell one as described above, and if I have to install another Mobo, what would be a decent one that I could use that would be compatible with the Dell Inspiron 518 Case. I would like to keep the case and reuse my PSU, Video card, memory (DDR2- PC-6400), etc. in to the new Mobo, though its a Dell Case. Any advice or recommendations would be appreciated Thank You.

Fast and furious.

My PSU is new (Shark 620 watt), interesting point, but everything seems to be fine regarding power, but I will look into that. Thanks

HI MegaMan, I checked PSU with tester and it was interesting. I did tests on 24 pin , 4 pin (12v), etc of PSU and all check out fine. I plugged back in 12v 4pin to Mobo and re ran diagnostic test on CPU fan on/off test and RPM. Everything past, no problems !!!!, will continue to re run CPU tests, also CPU temp remains same. Could it have been the 4pin 12v PSU connection? or maybe the new PSU is slowing going?. It is new (few month old)?