You can put any motherboard inside of the case. You can also use AMD or intel motherboard. Intel goes along the line of the Z series motherboard or x99. AMD has x something to go for theirs like x470 or x450 and the cheaper ones are the b series motherboards. Here’s an x99 one that is cheaper but won’t blow up in your face. [URL] Get the used option as those are 169.
  I am searching for buying `a motherboard for my r2 area 51 but either too pricy or i dontknow what to buy some suggested the X99 from msi but even that is discontinued is the MSI Z390-A PRO a replacement? Thanks for the help
Area-51 R2, motherboard replacement, #4