My son is an anime nut and uses his G4 Powermac DA to download Japanese animation 24 hours a day. I wouldn't mind so much but he has upgraded the CPU and video cards so that now it has four cooling fans running constantly, day and night, sounding like a refrigerator. I know that this is an old topic, but will this constant use ultimately damage the computer? Can it safely be left in this continuous download mode? Thanks.