I have a 19 inch and a 23 inch both LG running off my evga gts 250. I noticed that when I have only one display active. My GPU temp is about 41-42c but as soon as I add a secondary monitor it goes up to 60c, I also tried having both displays and playing a game on one and my gpu temp shot up to 76c. Is this normal for a 2nd monitor to cause such a dramatic increase in temp?