Bought the card as it is single slot, also to check if amazon would ship graphics cards to australia, sometimes they do, sometimes not. Am sure there is some kind of policy to look up. Then i noticed it had 4gb
Might look for cheap mobo with third 16x slot. Forget the available slot on my board was obly 4x.
Somewhere in toms article on physx + amd gpu's it mentions there is not much hit in running lower spec nvidia cards in the shorter slots.
I have no idea how crossfire works with modded drivers if at all + dedicated physx but if its a 3.0 slot you won't have anything to worry about. You might get slight bottlenecking with a 2.0 but I doubt the gpu is fast enough to make a difference anyhow.
Err wait what are you trying to do? don't file off any pins just file off the end bit thats stopping it from inserting into the slot on the mobo.
Just be warned I don't know how badly not having those excess lanes hurts performance. But uhhh. In short I don't know enough to answer this fully and confidently. Looks like I have some researching to do. (side note to anyone who knows the PRSNT2# pin is just a sense pin right?)