and also that board has horrible reviews, half as many 1 eggs (40+) as 5 eggs (80+)...? my advice would be to stay away from that board...
Well, I don't normally read user reviews because most of the people who complain are n00bs, for example:
"This board is upper garbage, the HD 4870 I installed blocked one of the PCI slots" etc etc.
If OP feels uncomfortable about it, he can swap it out for a different 790GX. It looks fine to me though, 4 phase power, all solid caps, 2 PCI-E slots...