Computer is running again, new card is installed, and I haven't had any graphics glitching or freezing SO FAR *knocks on wood*...

The main thing worrying me is that when I very first turn on my computer now, the very opening "Dell" Screen shows up in negatives colors, and oddly. This indicates some problem, somewhere, to me... but I have no bloody clue what it is. And I haven't noticed graphical oddities elsewhere yet. Going to reinstall WoW and its million and one patches, so once I get it running I can see if there's anything noticeably wonky in something more graphics-intensive... wish me luck. :/