So recently I've been hearing a sudden vibration like sound coming from my PC. Best way I can describe it is a "Brr" like as if a cable got stuck on a fan but not as high pitched and it barely lasts a second. I've checked for loose cables and have no idea what could be causing this. The only change I've recently done (just around this started happening) is that I changed my PSU and my back panel might not be the prettiest as its a bit messy but no cables interfere with any fans. The sound is either coming from the front of my PC or the back panel, I'm not sure.