Had my iMac G5 since Monday and all was fine. Popped in a 512MB Crucial via Newegg stick. System recognized the RAM and then a kernal panic about a half hour later. Could be the RAM but Entourage X has been unexpectedly quitting a lot. Decided to run extended h/w test from Apple CD. Been running for 40 minutes now and fans have been blowing full bore the whole time. Very noisy. Fans have not kicked in all week before this. Kind of frustrated now. Edit: test took 49 minutes and it reports all is well. Rebooted and Entourage quits on launch. Went to renew .Mac and kernal panic. Sigh, must be the RAM. Will let it cool down and remove it. How is newegg with returns?