Shame! Shame on Nvidia for crying rape because of their driver version. Thats lame and im probably not going to buy another Nvidia graphics card for awhile.
I gave my friend the first computer i bought with my own money and he tore it apart for peices and gave it all away to other people, i couldnt believe that. (Note he sold/traded the peices too!)
You should reformat if you got a new motherboard, that way if you do have a problem you'll know what it is. It might not even load if you dont format it, atleast it was like that with me.