Can a Xion 580W PSU take a second ATI 4850?

MethosTR

New member
I've been considering buying a second ATI HD 4850 for my computer, but I wonder if my PSU is adequate enough for two 4850's in Crossfire. If not, could it take one HD 4870

Motherboard: MSI K9A2 CF (2 PCI-E slots + 1 PCI slot)
PSU: XION 580W, don't know the other details so well...

And also, could it take a sound card as well (haven't decided on the type or model)
 
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