I am looking to either one of these boards. What is the difference between the two? The only real difference I can see is the m5a99fx pro has dual pci-e x16 slots and the m5a99x evo runs sli x8. I have a gtx 670 at the moment and may sli in the future. Will I see any performance difference getting the 99fx pro over the evo?
Also, the m5a99fx pro is $30 more and will need to be specially ordered. I can get the m5a99x evo today. Is it worth the extra money and waiting?