Hi. I got an iMac about 2 weeks ago. 2017 27” 3.4 Ghz, i5, 1 Gb fusion drive. It makes a strange noise (sometimes) when using it. The noise is very random but i can always hear it when booting up the iMac. I didn't hear the noise at first but started hearing it when I'm in my room in complete silence. I don't hear it very often because I most of the time when I'm using the iMac I'm using headphones with it. this is the noise: This noise it completely random except when starting up the iMac. I installed bootcamp on my iMac and this noise is much more frequent there than it is usually. The noise doesn't bother me that much, except when I'm not using headphones because then it can because a little irritating. This is my first iMac so I'm not sure if the noise is normal or not. Thanks in advance.