Riser Specs Form Factor: Low-profile PCIe riser card (left side) PCIe Slots Enabled: 1 × PCIe Gen3 x16 (when paired with FIO blank on right) FlexibleLOM Slots Enabled: None Compatible Systems: HPE ProLiant XL1x0r & XL170r Gen10 servers Slot Position: Left riser bay of blade enclosure Installation: Factory-integrated in CTO/BTO configurations Alternate Pairing: Enables up to two x16 slots when combined with appropriate right riser kit Condition: Refurbished and tested Part Number: 874296-B21 This left-side low-profile riser kit enables the use of a single full-length PCIe x16 card in the specified blade servers, slotting into the designated bay. It supports flexible expansion by allowing one high-bandwidth expansion card while utilizing the FIO blank on the opposite side to maintain proper airflow. Designed for factory integration, this riser ensures balanced chassis cooling and compute expansion. When paired with the correct right-side riser kit, you can configure dual PCIe x16 slots, offering scalable performance for GPUs, NVRs, or accelerators in compute-heavy rack environments. Notes:HPE XL1x0r Gen10 Left Low Profile Riser Kit HPE XL170r Gen10 Right Riser FIO Blank Kit 874802-B21 total available PCIe slots is one (1x16) total available FlexibleLOM slots is 0. P1 LP Kit 874300-B21 total available PCIe slots is two (2x16) total available FlexibleLOM slots is 0. P2 LP Kit 874302-B21 total available PCIe slots is two (2x16) total available FlexibleLOM slots is 0. 16NVMe P2 LP Kit 874304-B21 total available PCIe slots is two (2x16) total available FlexibleLOM slots is 0 HPE XL190r Gen10 P2 Riser Kit (874851-B21) is selected, total available PCIe slots is four (4x16) total available FlexibleLOM slots is 0. FLOM Riser Kit (874847-B21) is selected, total available PCIe slots is three (3x16) total available FlexibleLOM slots is one. 16NVMe FLOM Riser Kit (874849-B21) is selected, total available PCIe slots is three (3x16) total available FlexibleLOM slots is one.
