That processor will not work with that motherboard.
The DX58SO is a socket 1366 motherboard.
The Core i7 860 is a socket 1156 processor.
I'm glad Scout asked you to post the rest of your build.
whatever it takesWhat's you total budget?
Let us just start from scratch and help you choose parts. The motherboard you have selected is $250 for an Intel board...there are better products to choose at that price range.