My PC is making a weird sound, like electric toothbrush or a hair buzzer sounding.It will happen maybe every 2 minutes and then does it every couple of seconds and repeats. My computer is a https://www.amazon.com/SkyTech-AMD-730-Desktop-Computer-FX-4300/dp/B01LAMXYYK/ref=sr_1_29?s=pc&ie=UTF8&qid=1487821698&sr=1-29&keywords=gaming+computer but I replaced the CPU with a FX 6300. The PSU isn't listed, but its a TR2 420w. Any help would be great.