What M.2 PCIe Blade SSD would fit into my late 2012 iMac? I'm looking to retrofit an M.2 SSD into my iMac, and if I could upgrade with one of the really really really fast newer chips that are coming out that would be great. However, there is laughably little information regarding the M.2 port found specifically on the late 2012 27" iMac. In fact the entire M.2 PCIe port has very little information. So broadly what I want to know is: what Blade SSD will fit my iMac? More specifically, what's the difference between the M.2 port in the 2012 iMac and the 2013 iMac? What version of PCIe is on that curious little port?