I have a G5 Daul 2.7 with 2g of ram (OX 10.4.3). I do a lot of vectorworks 3D rendering ( architectural )on this puppy. I have noticed a problem lately: The fan stays on after i wake up the computer. I don't think they are the processors' fans, i think it might be the fan that with the speaker. I'm not 100% sure. Well, the fan would stay normal if i restart the computer. The fan problem only occur after i awake the computer from the sleep mode. Can someone help me? Any suggestions? Feel free to drop me a line on aim: mrdingliu Thank you very much for reading my post.