Having problems with your Dell Dimension E521 AMD Athlon 64 X2 Dual-Core 3600+ , 1 GB DDR2 SDRAM , 250 GB EIDE SATA H... PC Desktop ?

Noisy fan Fan motor is mounted vertically with a shroud around it in front of machine blowing across processor


Answers :

Usually the heat sensor on either the CPU or the mother board through the BIOS software ajusts the sped of the van. Are you talking about the CPU fan , The Main case fan or the power supply one? 
Repair Help & Product Troubleshooting for Dell Dimension E521 AMD Athlon 64 X2 Dual-Core 3600+ , 1 GB DDR2 SDRAM , 250 GB EIDE SATA H... PC Desktop

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Noisy fan Fan motor is mounted vertically with a shroud around it in front of machine blowing across processor


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