When you turn on the computer, the cooler turns on at maximum speed, what should I do?

Question

Iron

The computer is quite old, but still in service. I wanted to update the processor on it, ordered it, changed it, the processor refused to work, the speaker squeaked. I sent it back and installed my native Pentium. Lubricated with thermal paste and put the cooler. I turn it on and immediately noticed that the cooler was working at a slightly increased speed, about 2000. Well, I decided to restart the computer and after that, the cooler turns on at maximum speed. I tried to change the thermal paste more than once, I tried two pieces, the computer worked fine before that and kept the speed at 800. I removed it carefully, nothing fell. With what it can be connected?
Hardware:
Intel pentium dual core e5500
RAM: 6 GB
Motherboard: acer g43t-am3

Answer 1

Go into the BIOS and check the RPM settings, set the desired

Answer 2

set the fan mode in bios. there are usually several options for Silent Maximum, etc.

Answer 3

1) Loose fit of the sole of the cooler to the processor. It may be due to broken fasteners, improper application of thermal paste (smearing like butter on bread - and an air bubble formed there when pressed), applying too thick a layer of thermal paste.
2) Incorrect connection of the cooler (to the wrong connector).
PS I don't recommend fighting the BIOS in the BIOS, you need to treat the cause, not the consequence ...