An adapter assembly (100, 200, 300, 400), comprising: a riser board (104, 204, 304, 404) that engages with an expansion slot (212, 312, 412) disposed on a system board (316, 416) of a computer system, the riser board including a first riser expansion slot (210, 410) on one side of the riser board (104, 204, 304, 404) configured to mate with an expansion computer component; an adapter cage (102, 202, 302, 402) to removably and structurally mount to the riser board (104, 204, 304, 404) on the same side as the first riser expansion slot (210, 410) and to receive multiple computer components (108, 208, 308, 408) in a stacked fashion such that the computer components are perpendicular to the riser board (104, 204, 304, 404) and an adapter board (106, 206, 306, 406) of the adapter assembly; and the adapter board (106, 206, 306, 406) attached to or disposed on the adapter cage such that the adapter board is perpendicular to the riser board (104, 204, 304, 404), the adapter board including multiple electrical connectors (109, 209) that are to mate, respectively, with complementary electrical connectors of the multiple computer components (108, 208, 308, 408) and facilitate electrical communication between the computer components and the computer system; wherein, when the adapter cage (102, 202, 302, 402) is structurally mounted to the same side of the riser board (104, 204, 304, 404) including the first riser expansion slot (210, 410), at least one of the adapter cage (102, 202, 302, 402), adapter board (104, 204, 304, 404) and multiple computer components (108, 208, 308, 408) impedes the first riser expansion slot from connecting with an expansion computer component, such that the first riser expansion slot (210, 410) is unengaged. a riser board (104, 204, 304, 404) that engages with an expansion slot (212, 312, 412) disposed on a system board (316, 416) of a computer system, the riser board including a first riser expansion slot (210, 410) on one side of the riser board (104, 204, 304, 404) configured to mate with an expansion computer component; an adapter cage (102, 202, 302, 402) to removably and structurally mount to the riser board (104, 204, 304, 404) on the same side as the first riser expansion slot (210, 410) and to receive multiple computer components (108, 208, 308, 408) in a stacked fashion such that the computer components are perpendicular to the riser board (104, 204, 304, 404) and an adapter board (106, 206, 306, 406) of the adapter assembly; and the adapter board (106, 206, 306, 406) attached to or disposed on the adapter cage such that the adapter board is perpendicular to the riser board (104, 204, 304, 404), the adapter board including multiple electrical connectors (109, 209) that are to mate, respectively, with complementary electrical connectors of the multiple computer components (108, 208, 308, 408) and facilitate electrical communication between the computer components and the computer system; wherein, when the adapter cage (102, 202, 302, 402) is structurally mounted to the same side of the riser board (104, 204, 304, 404) including the first riser expansion slot (210, 410), at least one of the adapter cage (102, 202, 302, 402), adapter board (104, 204, 304, 404) and multiple computer components (108, 208, 308, 408) impedes the first riser expansion slot from connecting with an expansion computer component, such that the first riser expansion slot (210, 410) is unengaged.