Well, after cleaning the fans and such I ran really great for a whole evening. Played WoW, no crashes, all seemed like it was fine. But this morning after about an hour of WoW I got the gray line crash again. So I booted to my thumb drive with atiflash, and forced the flash to the newer bios.
Good news: flashing worked
Bad news: no signal from my video card, I'm looking at black screen
Good news: I backed up my old bios onto my thumb drive so I can blindly type the command to flash it with that old bios
Bad news: can't seem to get my computer to boot to thumb drive anymore, instead it's booting to windows normally (I can hear the little start up song)
Good news: I figured I could hook up a VGA cable to my onboard graphics and get this fixed up in a jiffy
Bad news: my PC has no such port for onboard graphics, if there are any
Good news: I have an old PCIe card I can install for now
Bad news: even if I do that, I'm not sure how I can then flash my old card back to its old bios, and even if I do, I'm still going to have gray line crashes.
Summary: I am ordering a new card today and will install it when it gets here, and hope for the best. Any suggestions? I'm leaning towards a Sapphire Radeon HD 6570 1 GB.