Strange whining noise

Leo Dragons

Honorable
Mar 13, 2013
18
0
10,510
This strange thing started to happen like 2 months ago, when i first heard this noise i thought there was a cricket in my room, since it was almost summer and every kind of insect gets in my room i thought it was possible, so i ignored it.

A week later i heard this noise again, that sounded like a cricket (and only sounded for a second like the first time), but when i tryed to figure out where it was coming from i noticed it was coming from my pc.

I recently installed a HDD, and thougt it could be faulty, did some tests to both of my hard drives and they work good.

This strange noise only happens when the PC reaches high loads and only lasts a second, sounds almost like a cricket and it's very loud. In a normal pc use session i can hear it almost 2 to 3 times.

I don't think the hard drives could be the cause of this noise, but i haven't tested the other components. What could it be ?