The Supermicro 1U RHS Passive Riser R1U-E8R is a dedicated expansion module designed for 1U Twin server platforms. It provides a single PCI Express 2.0 x8 slot on the right-hand side (RHS), enabling the installation of compatible PCIe x8 add-in cards in space-constrained 1U chassis.
This riser is a passive solution, meaning it does not include active electronic components, thermal sensors or auto-detection features. It simply routes the PCIe x8 signal from the motherboard to the expansion slot, ensuring a stable mechanical and electrical interface for supported cards.
The riser is intended for environments where a reliable, fixed PCIe x8 expansion path is required without additional monitoring or management functions. Its passive design minimizes potential points of failure and is suitable for administrators who need deterministic behavior and straightforward integration with compatible Supermicro 1U Twin systems.