Riser card

In general, the main purpose is to change the orientation of the expansion cards such that they fit a limited space within casing.

This allows for maximum data transfer speeds of 32 GB/s when using PCIe 4.0, along with 75W of power to be delivered from the host device.

They are used to sandwich a graphics card closer to a computer motherboard and are made to the same heights as server units for most applications.

[2] The first computer system to use a riser card on its motherboard was IBM's Personal System/2 Model 30, introduced in 1987.

It was originally the lowest-end entry in IBM's PS/2 and thus featured slots for Industry Standard Architecture (ISA) cards.