A computer chassis includes a first ha frame having a first opening and a second bay frame disposed adjacent to the first bay frame. The second bay frame has a second opening of a same size as the first opening. The first bay frame and the second bay frame a both configured to receive one of a first adapter cage and a second adapter cage. The first adapter cage is for one or more first removable devices of a first form factor and the second adapter cage is for a plurality of second removable devices of a second form factor. The second form factor is different from the first form factor.