The fan on the Main board rotates every 5 seconds for a high second.
At the same time seems my computer to have a few Probelme on shutdown and Windows may report that no longer work properly, but I do not see any connection there. For about half a year I have installed a new graphics card + power supply. There is definitely no hum (no cable in the way). Otherwise overheating nothing unless I can feel that.
Is it the processor?
If Windows is the cause?
Have verifiable eventually leads incorrectly plugged in during the upgrade?
Dell Inspiron 580
Processor: Intel Core i5 3.2GHz
6 GB RAM
Nvidia GeForce GTX 760
Thanks to helpful helper: D