had it for 8 months just started making this noise..on start up it will make it for about 5 seconds sometimes not at all and then stop..
but when I play games like Tera the cpu usage goes to 50-60 and the noise will come back.
after I quit the game and let it sit idle for 10-20 minutes it'll stop
Dell i5 3330 3.0 ghz
8gb ram
GTX 970