Weird sound coming from acer swift 3

prabal_rawat

I had recently bought  a acer swift 3 SF314-41 ,with 4gb RAM and 128gb SSD around 3 months ago. I had upgraded the RAM to 8gb using a Hypersonic 4gb DDR4 2666mhz stick as it was the max that was supported according to command prompt. After using it i noticed a sound coming from the right of the body (if you look at it from the back). It sounds like an electronic cricking,sizzling-ish,wheezing sound.It is very faint, you have to bring your ears very close to the body to hear it.....It is definitly not the fan as that is sounding perfectly okay......What can it be? Is it dangerous? Is it normal motherboard noise?



p.s- I am thinking it is coil whining but i can't remember if it was present 3 months ago...

prabal_rawat

Edit: It seems to lessen but not stop completely when plugged in.(Kindda sounds like a HDD, but there is none in my laptop)