any ideas?
Are you saying whatever card is in the first slot gets hotter? I had problems with the cards running hot, so I stuck a small fan to blow right on the card (at the back of the computer, blowing air 90 degrees from the MB). The air it blows ends up in the front part of the case where it leaves. The fan is about 12" in size and blows more air than typical case fans, but is not much noisier than such, just something from the local department store. It dropped the temperature of one card that could barely cool itself (fan runs almost on max) by 8C and now I don't hear this jet engine sound . Also means the tower has no side panel... but oh well.