unless I'm interpreting that table wrong - I'd say it looks like your PSU is going out the door. IIRC, 12+ should hold stable at no less than 11v even once the CPU goes under full load. Anything below that is cause for concern . . .
and then when you factor in that your GPU draws a butt-load of power once it goes into 3D mode (loading up a game, for example) that could stress out the PSU enough that the whole system burps and crashes.
If you've got another known good PSU around, swap 'em out and see if there's any difference