Hi there a few months back I upgraded my G4 733Mhz Quicksilver with a dual 1,6 Ghz card from Powerlogix. I initialy experienced some problems with the computer turning off on it's own accord after an hour or so of use. After changing the settings in the energy-panel to highest performance this seemed to stop. Anyway I recently had the brilliant idea (not) of replacing the fan above my harddisk in the vain hope to reduce some noise (which has been the only negative side to my experience with this computer). Everything seemed to work fine initially but suddenly the machine once again started to switch off on it's own account. I therefore put the original fan back, but the machine still switches off when I push it just a little bit too hard. Nothing fancy really, just a few apps open and running MAME. According to Powerlogix CPU Director was running just south of 109 F when the machine swithched off. This of course makes me worry more than just a little bit. My only*real hope is that I have maybe inserted the original fan backwards? Could someone just please tell me whether the sticker on the fan should point outwards into the computer or if it should be pointing away, into the "wall" not being visible. Thanking you all in advance for your kind help!