Just as a FYI, that crankset, SRAM X7 2x10 GXP Crankset 2011, does not use a BB30 / PF30 bottom bracket.
Not sure why you think it comes with one.
Page says External GXP bottom bracket with Gutter Seal Technology. That should fit your Rockhopper.
A GXP crank cannot use a BB30 or PF30 BB without adapters.