Either way, it won't boot. Booting into mac it gets to the grey screen with an apple and ... stops. I left it there overnight to see if it got over it. It didn't. I booted into windows this morning and got something I don't think I've seen since the days of the 486... an 80x25 screen of random blinking blocks.
So... it's possible the new video card is screwing something up.
Or... it's possible there's something wrong with the RAM.
When I get home tonight, I'm going to swap out the 8GB of Kingston ram for the *sigh* 1GB it game with. We'll see how that works. If it doesn't help, I'll yank the second video card too. If both of those together don't work, it gets hauled into Apple, where I will be cranky with them.