Could you show us a screenshot of your CPU-Z? All tabs? I'm pretty sure there is an option in the interface to take a screenshot, please do so...
I think the two most popular cards right now are the GTX 260 and the radeon HD 4870 due to their competitively priced nature
I've heard both sides of the argument. I personally have used both and got crashes when I used ganged. So, I use unganged.
That is awesome! I am doing this with my next build
Check out tom's hardware graphics card heirarchy chart. Just google it. Last months article included mobile graphics cards.
Is everything on stock settings?
Separate names with a comma.