Well your gonna want a 790i board for DDR3 + SLI.
Crossfire + DDR3 is tricky, your looking at this expensive x48 board:
http://www.newegg.com/Product/Produc...82E16813128358
Crossfire + DDR3 is tricky, your looking at this expensive x48 board:
http://www.newegg.com/Product/Produc...82E16813128358