Lenovo ISG ThinkSys SR 550/ 650 2U x8/x8/x8ML2 PCIe FH Riser 1
The Lenovo ISG ThinkSystem SR550/SR650 2U x8/x8/x8ML2 PCIe FH Riser 1 is a high‑quality expansion component designed to enable flexible PCIe connectivity in 2U ThinkSystem servers. Built for Lenovo SR550 and SR650 platforms, this riser card supports multiple PCIe slot configurations — allowing three full‑height expansion cards to be installed in a 2U chassis with optimized spacing and airflow.
This riser is identified as Riser 1 in the SR550/SR650 expansion hierarchy and provides up to three PCIe x8 electrical connections (operating as x8/x8/x8ML2 depending on system configuration), enabling powerful networking, storage, or accelerator cards to be installed without sacrificing performance. Its full‑height (FH) form factor accommodates standard add‑in cards, simplifying upgrades and expansions.
Engineered to maintain signal integrity and system reliability, this riser card integrates seamlessly with Lenovo server backplanes. This makes it ideal for applications that require additional I/O capacity such as high‑speed networking, NVMe storage controllers, RAID adapters, or GPU support where supported. Lenovo’s rigorous internal testing ensures consistent performance across enterprise workloads.
Whether you’re expanding network bandwidth, adding faster storage controllers, or enabling specialized compute cards, this riser card provides a flexible, scalable, and reliable PCIe expansion option within SR550 and SR650 2U rack systems.
Key Features
| Feature |
Description |
| Multiple PCIe x8 Slots |
Supports three x8‑capable PCIe connections for expansion cards |
| Full‑Height Support |
Designed for full‑height (FH) add‑in cards in a 2U chassis |
| SR550/SR650 Compatibility |
Engineered specifically for Lenovo ThinkSystem SR550 and SR650 servers |
| Optimized Airflow |
Placement and design maintain internal airflow in 2U configurations |
| Enterprise Reliability |
Lenovo‑qualified for 24/7 server operation and mission‑critical workloads |
| Flexible Expansion |
Ideal for network, storage, and accelerator cards |
Technical Specifications
| Specification |
Details |
| Product Type |
PCIe Riser Card – Riser 1 |
| Server Compatibility |
Lenovo ThinkSystem SR550 / SR650 (2U) |
| Slot Format |
Full‑Height (FH) |
| PCIe Connections |
x8 / x8 / x8ML2 electrical (system‑dependent) |
| Supported Cards |
Network adapters, storage controllers, accelerators |
| Form Factor |
Riser card for 2U chassis |
| Typical Use Case |
PCIe expansion for enterprise workloads |
| Manufacturer |
Lenovo ISG ThinkSystem |
