I am trying to use crossfire on my MB, it is a Biostar TZ77B. It has one PCI-E 2.0 slot, which is fine with my i5-2500k processor, and it also has one PCI-E 3.0 port. From what i hear i need an ivy bridge to even use this port? yes or no? and if yes, can i make it able to be used without buying the ivy bridge? Thanks