Radeon 5850 Crossfire Woes

I just got another 5850 today in the mail, and after lovely unboxing it my jaws dropped when i opened my case. These are FAT cards, and two of them side by side won't fit into the two PCI-e slots:(

Specs in my sig, and I'm basically wondering if my biostar motherboard will support another Radeon 5850 in CrossfireX?

I do see another PCI-e slot beside the one currently occupied, but it is VERY close to the current card and I don't think another 5850 would fit:(

Maybe my motherboard only supports single-slot PCI-e cards in CrossfireX (Whereas the 5850 is a twin-slot PCI-e card)? :(

Any insight into this would greatly appreciated.

P.S.: Please suggest me a PSU to support my overclocked i5 and two 5850 in crossfire, I'm thinking any 750W one would do, heck a good 650W one with good amperage on the 12V should do it. Suggestions?

P.S.S.

NEXT TIME YOU BUY A PSU, BUY AN ENERMAX!

My 5-year old 485W Enermax PSU is still serving me comfortably, I never hear the PSU fan go above 30%.

This is a pic I found of your Mobo I think

http://img8.imageshack.us/img8/1808/...2513930433.jpg

Now are you saying you can't fit 2 cards in there?? It looks way roomy to me. As far as the PSU goes. I read you like enermax but I'm a corsair guy so here's my recommendation CORSAIR CMPSU-750TX Yeah I'd also say go 750w instead of 650 It's better to have it and not need it then need it and not have it :)