everything is plugged in. Just wondering, but before when the Nvidia card was in, I remember the computer displaying what card is in the PC before booting up. After reinstalling Windows XP, it still does that. I remember the computer not doing that when the system was first built. I think a later Nvidia driver caused that. Can that be the problem? Remember, I just reset the computer so no drivers are currently installed.
that is a big change. clear cmos, format, reinstall. be sure of 8x agp? low .8 volt set?
did you buy the used ati with oe cooling? check the clearnce on gpu by shining a light in there, between the heatsink and gpu. it may be a goner...
and never even look at nvidia again. that is for the "others".