The Supermicro R1UU-2E8 is a passive riser card designed for 1U server platforms in the UIO category. It provides two PCI Express 2.0 x8 interfaces, enabling horizontal installation of compatible expansion cards in low-profile 1U chassis. The LHS (Left Hand Side) slot position allows integration in systems that require precise mechanical alignment with the motherboard and chassis layout.
As a passive riser, this module does not perform signal processing or active switching. It simply routes PCI-E signals from the mainboard to the expansion slots, ensuring a straightforward and low‑complexity implementation.
This riser is intended for environments where mechanical compatibility with 1U chassis and stable PCI-E connectivity are required, without additional features such as GPU, NVMe, or M.2 support. The absence of thermal sensing and auto-detection simplifies integration and configuration, focusing on a direct, hardware-level extension of PCI Express lanes within compact server systems.