The card won't fit into your case, right?
Well, there's nothing you can do about it, maybe sell that card and get a proper card that would fit into your case...
maybe your case only accept low profile card(single slot), like HD5570 or any other low profile cards...
If you wanted to keep the card i'm sure all you would have to do is buy a bigger case.You would just have to move everything and that would mean recconecting everything which could lead to some problems.
I'm not sure what I want to do with it yet. What's a good low profile card? Maybe I'll just put one of those in.
I don't think the card would even fit on my motherboard, there's some large components just beside the PCI slot that I think get in the way.
So, I might need a new MOBO and case, which might be worth it given I've got a fairly good GPU and PSU? I have replaced a faulty motherboard before so fairly confident I can do it.