The Lenovo 4XH7A09866 is a dedicated I/O expansion kit designed for specific Lenovo ThinkSystem 1U rack servers. Because 1U servers are only 1.75 inches tall, standard PCIe expansion cards cannot be plugged directly into the motherboard vertically. This kit provides a “riser” card and a metal mounting bracket that reorients the slots 90 degrees, allowing cards to sit parallel to the motherboard.
This specific kit is a “Riser 1” configuration, meaning it is installed in the primary riser slot of the server. It features two PCIe Generation 4 slots, both of which provide a full x16 electrical interface for maximum data throughput. The “LP+LP” designation indicates that both slots are sized for Low-Profile (half-height, half-length) cards. This makes the kit ideal for installing high-speed components such as 25Gb/100Gb Ethernet adapters, NVMe storage controllers, or Fiber Channel host bus adapters.
Technical Specifications:
Part Number: 4XH7A09866
Slot Type: PCIe 4.0 x16
Number of Slots: 2
Card Form Factor: Low Profile (LP)
Server Support: ThinkSystem SR630 V2 and SR645
Included Components: Riser card and butterfly mounting bracket











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