Hi. I have a Dual 2GHz original Powermac G5, with 3.5gb ram and radeon x800 xt. I put it in sleep mode and hours later hot air continues to be blown out. And, when I put it in sleep mode, then awaken it, i can click on an app on the dock, it turns grey, does not bounce, and then the G5 locks up, forcing me to manally restart. I now have to keep the G5 running a large portion of the day without sleep mode because of this reocurring sleep problem. It does not happen all the time, but most of the time. Thanks