odd noise from psu

These noises only appear when I play a video or while playing a game. When playing a game it’s not so loud and not constant it happens only rarely but when playing a video it is constant and loud even though the PC is not really that much under load. I’m posting a short video. Intel Core i5...

So I've been meaning to buy a car charger for my laptop for an upcoming trip and since laptop chargers come in two pieces, was wondering if I could just buy a cord that connects from the cigarette lighter port to the transformer box (the mickey mouse shaped hole?). Since most laptop chargers...