Just wondering if running Apple Hardware Test is recommended for new iMacs? Someone told me that I should do it a while ago.. I started my AHT after I installed my RAM and tested the computer screen, chose the extended version, and now the bar is only about 25% after 1.5 hours. Is the speed typical, and is it really necessary to finish out the Apple Hardware Test? Perhaps I didn't need to choose extended? I guess it's better to be safer than sorry, but this is taking a really long time EDIT: Urgh. Hit stop test button and it doesn't stop the test ;_; I hope I didn't mess anything up.