I am wanting to use an MSI mobo MSI RS480M-IL with an ATX form factor for a new PC. Problem is I cant find that mobo sold at NEWEGG-instead NEWEGG sells an MSI RS482M-IL Socket 754 ATI Radeon XPRESS 200 Micro ATX AMD Motherboard. How is this 482 mobo different from the 480 mobo? If I have an ATX case, can I put a micro ATX form factor mobo inside or do I need to buy a special case?