Which motherboard form factor typically features a GPU mounted at a right angle next to the expansion slot?

The correct answer is associated with the Riser Card-Based motherboard form factor. This design is characterized by the graphics processing unit (GPU) being mounted at a right angle next to the expansion slot. The riser card enables positioning the GPU in a way that optimizes space within a computer case, which is particularly advantageous in compact builds.

The Riser Card-Based form factor is particularly useful in scenarios where traditional vertical GPU placement might interfere with other components or overall airflow. This format is commonly found in specialized systems where efficient use of space is paramount, such as in servers or compact gaming rigs.

While the ATX, Micro-ATX, and Mini-ITX form factors are popular motherboard designs, they typically do not feature GPUs mounted at a right angle. Instead, these form factors standardly place the GPU in a vertical orientation, which aligns with the traditional layout used in most desktop computers. Their designs generally accommodate a variety of peripherals and components but do not specifically focus on the unique spatial arrangement of the GPU.