Hey all,
My Sapphire X800 GTO has been working great for the past 8 months or so, and was working great this morning. But this evening when it booted up I get this:

Here's what I've tried so far:
-Reconnecting cables, removing/reinstalling graphics card, check temps (normal), check o/c (off).
I've done a few mods (see specs), but nothing in the last 6 months, so what gives? ...any ideas?

(Getting sinking feeling this baby is about to bite the big one...)