Attempted to load using LiveCD for Ubuntu 11.10 instead of 12.04 and got kernel panic there also. 11.10 had been running with no problems on the machine for nearly a year now, so at this point I'm assuming I've got some severe hardware issues. Unless I see a comment here for another action to try, I'll be retiring this motherboard/RAM/video card in the next few days.
Attempted to load using LiveCD for Ubuntu 11.10 instead of 12.04 and got kernel panic there also. 11.10 had been running with no problems on the machine for nearly a year now, so at this point I'm assuming I've got some severe hardware issues. Unless I see a comment here for another action to try, I'll be retiring this motherboard/ RAM/video card in the next few days.