Ok. Is the mobo SLI ready? If so, I will need a full case? Will a 750W PSU be able to SLI 580s? If not 560s? Do I need 1866+ Mhz of RAM speed or can that be OC higher? And Druid, the link that you posted does not work, can you relink it? Also is 1 GXT 580 better than 2 GTX 560s?