The ones that say "used" seem to be unshared, but try it yourself and verify; if you're using WinXP/2K and ACPI everything will be on the same IRQ anyway, if using Standard PC mode (I've used both, with not too many differences, on this board), then you might be able to see which is sharing, hope this helps, I will check my configuration when I get home since I don't remember which slots I have my cards in, but they aren't sharing with anything else.