hi guys I am using mbp 15' 2011 early version and somthing has gone wrong i am having this new heat problem for one week. so...suddenly whenever i put my DAC thru usb port and start using my active speaker .....CPU gets hot upto like 155 °F real fast.....I am not really concerned with the degree itself but the fan goes real noisy almost upto 5000rpm even though i am not doing any heavy works, just streming musics..if I don't play any music(or whatever that has anything to do with sound like watching movies) it's very quiet. and of course if I unplugged the dac, active speaker and just use the mbp's internal speaker.....no heat problem... it was never like this before....I used to watch 1080p fullhd blueray movies with my dac and speakers and fan spinned only obout 3500~4500 and this wasn't constant either.. but now watching hd movies makes the fan go crazy constantly upto 6800 rpm so..the only changes i made recently is having some updates which seems no related to fan noise(ex safari, security things)....I had the update while mbp was connected to external monitor thru minidp which also seems impossible to me causing any problem but anyway I did use the timemachine but didn't solve the problem. resetting the smc didn't do the work either. I am very confused with my situation is ther any suggestion? p.s DAC is music streamer ii which gets power from the usb port.