4 ms·If they cannot house 2.5" what size can they house then? Or did you mean 3.5"?by chrisper 9y agoIf they cannot house 2.5" what size can they house then? Or did you mean 3.5"?dijit 9y agoM.2 SSDschrisper 9y agoOh wow. I must keep up with the times then!astrodust 9y agoThose are PCI-e so they're substantially faster than their S-ATA equivalent.sevensor 9y agoWow, chrisper isn't the only one who hasn't been paying attention. It's news to me too. These slot right into the bus, just like a hardcard! Everything old is new again.unixhero 9y agoNo he meant 2.5" Those models only have the "MacBook pro" "stick ssd" aka M2 SSD, which has a smaller form factor.