Yes, since your 7900GT is a PCI-E card and the motherboard you cited has # One (1) PCI Express x16 slot and One (1) PCI Express x1 slot, that will work.
What about your RAM? Most likely, you'll need to buy new RAM, also, since the new motherboard probably uses different memory than the old motherboard. However, to be sure of this, we need to know what motherboard you now have.