That's what I am saying, you can run a x1 card in the x4 slot, or the sound card in that slot as well.
Thank you Deemo13. Your a life saver. I never knew that you could run a sound card pci express x1 in the x16 and x4 slot. You've save me a lot of money. I just installed my creative X-fi SB card in the x4 slot (3rd x16 slot with x4) and it worked beautiful.
Now I have 2 XFX 7770 in the dual x16 slot, and the sound card in the last x4 slot.