Hello all. Just picked up a G5 Quad in excellent condition. I need this machine for some old software I use for my business. I swapped out the hard drive from my ailing G5 2.3 (from early 2005). The Quad is from late 2005. It boots up and works great except when I open up an app in Classic mode, the fans start to take off. When I close Classic, the fans go back to normal. I'm running Apple Hardware Test and everything checked out fine but has been working on the 8gb ram for a long time. Any help you could give me would be greatly appreciated.