hmm...ordered this ram for the computer in my sig. followed the instructions from the apple pdf for replacing memory on teh emac ati graphics and the emac usb 2.0 to the letter, except i couldnt get a phillips screwdriver to work so i used a flat one. anyway, system profiler only recognizes 256mb out of the 768 installed. it's noticeably faster, especially booting and when running several apps, but it doesnt show up in system profiler. well, why not is guess is my question. i shut it down before installing it and it didnt show when i booted, so i restarted and it didnt show again. im gonna try restarting again to see if it works but id like to know if i did anyting wrong.