It really depends on what "loud noise" you're hearing. If (and i'm assuming this is the case) it's fan noise you're hearing, this is perfectly normal. As the PSU, GPU, and CPU work harder, they generate more heat and in turn the fans attached ratchet up to dissipate it. Stock fan solutions on most cards and processors tend to be a little more noisy than aftermarket. Now if the noise you're hearing is a harsh buzzing sound, or a high pitched whine, that's something to be concerned about.