• Lenovo ThinkSystem ST550 – Scalable 4U Dual-Socket Tower Server with Intel® Xeon® Scalable

    Keywords

    Lenovo ThinkSystem ST550, Intel Xeon Scalable, dual-socket tower, TruDDR4 memory, AnyBay storage, NVMe bays, XClarity management, Predictive Failure Analysis, ThinkShield security, 4U server

    Description

    The [Lenovo ThinkSystem ST550](#Lenovo ThinkSystem ST550) is an enterprise-grade 4U tower server featuring up to two 2nd-Generation Intel® Xeon® Scalable processors—each with up to 22 cores and 3.8 GHz turbo boost—providing a 36 % performance increase over previous generationsLenovo Press. With six memory channels per CPU and TruDDR4 speeds up to 2933 MT/s, it supports up to 768 GB of RDIMM or 768 GB LRDIMM memory, plus Intel® Optane™ DC Persistent Memory for up to 2 TB total effective capacity in App Direct modeLenovo Documentation.

    Storage is highly flexible: configure up to 16 hot-swap 2.5″ or 14 hot-swap 3.5″ bays, with four AnyBay bays that accept SAS, SATA, or direct-attach NVMe SSDs, delivering up to 154 TB raw capacity. Two onboard M.2 slots (RAID 1) support boot drives without consuming drive bays, and new 12 Gbps Broadcom RAID controllers with up to 4 GB cache manage up to 20 drives per controllerLenovo Press.

    Lenovo’s XClarity suite—comprising the embedded XClarity Controller, XClarity Administrator, and new UEFI-based Provisioning Manager—simplifies deployment, firmware updates, diagnostics, and power management, reducing provisioning time by up to 95 %Lenovo Press. Security is enforced end-to-end via ThinkShield, including TPM 2.0, Secure Boot, firmware resiliency (PFR), and optional chassis intrusion detectionLenovo.

    Key Features

    • Dual 2nd-Gen Intel® Xeon® Scalable CPUs: Up to 22 cores/CPU, 3.8 GHz, Intel Turbo Boost, Hyper-Threading, AVX-512, VNNI, Speed SelectLenovo Press

    • Up to 768 GB TruDDR4 Memory: 12 DIMM slots, 2933 MT/s, SDDC/ADDDC, memory mirroring/rank sparingLenovo Documentation

    • AnyBay Storage: 16× 2.5″ or 14× 3.5″ hot-swap bays; 4× AnyBay support SAS/SATA/NVMe; 2× M.2 boot RAID 1Lenovo Press

    • High-Speed I/O: Up to 6× PCIe 3.0 slots plus M.2 slot; 12 Gbps SAS backplane; NVMe via switch adapterLenovo Press

    • Enterprise Reliability: PFA alerts, light-path diagnostics, hot-swap drives/PSUs/fans, ASHRAE A4 certifiedLenovo Press

    • Lenovo XClarity Management: Controller, Administrator, Provisioning Manager, Energy Manager, Redfish APILenovo

    • ThinkShield Security: Secure supply chain, TPM 2.0, Secure Boot, Platform Firmware Resiliency, chassis intrusion switchLenovo

    Configuration

    ComponentSpecification
    Form Factor4U tower server (502 × 175 × 420 mm)
    ProcessorsUp to 2× Intel® Xeon® Scalable (Gen 1/Gen 2), LGA 3647, up to 22 cores/CPU, 125–205 W TDP
    Memory12× TruDDR4 slots (RDIMM/LRDIMM, 2933 MT/s), up to 768 GB; 12× Optane DCPMMs for mem. mode (up to 2 TB total)
    Drive Bays16× 2.5″ or 14× 3.5″ hot-swap; 4× AnyBay; 2× M.2 boot slots (RAID 1)
    RAID & StorageBroadcom 12 Gb/s SAS RAID (0,1,5,10,50) with 4 GB cache; SW RAID; VROC/VMD for NVMe; up to 20 drives per controller
    I/O SlotsUp to 6× PCIe 3.0 FH/LP; 1× reserved M.2 slot; optional NVMe switch adapter
    Network2× 1 GbE LOM; optional ML2/PCIe 10/25/40/100 GbE
    Power SuppliesUp to 2× 550 W–750 W Platinum or 750 W Titanium hot-swap (N+N redundancy)
    ManagementXClarity Controller, XClarity Administrator, Provisioning Manager, Energy Manager, Redfish API
    SecurityTPM 2.0, Secure Boot, PFR, chassis intrusion switch, ThinkShield end-to-end security

    Compatibility

    Certified for: Microsoft Windows Server (2016/2019), Red Hat Enterprise Linux (7.x/8.x), SUSE Linux Enterprise Server (12/15), VMware vSphere ESXi (6.x/7.x)Lenovo Press.

    Usage Scenarios

    • Office & ROBO: Whisper-quiet, compact 4U tower ideal for file/print, email, point-of-sale, and remote-office workloadsLenovo Press.

    • Virtualization & VDI: Up to 52 cores/104 threads and AnyBay NVMe bays accelerate VM density and profile storage for user desktopsIT_Creations.

    • Big Data & Analytics: High memory bandwidth and Direct-attach NVMe deliver low-latency access for in-memory databases and real-time analyticsLenovo Documentation.

    Frequently Asked Questions

    Q1: What is Lenovo AnyBay technology?
    A1: AnyBay bays accept SAS, SATA, or U.2 NVMe SSDs interchangeably, allowing you to mix storage types in the same drive sleds for maximum flexibilityLenovo Press.

    Q2: How much memory can the ST550 support?
    A2: Up to 768 GB of TruDDR4 RDIMMs or LRDIMMs at 2933 MT/s, or up to 2 TB effective capacity using 12 Intel Optane DC Persistent Memory modules in memory modeLenovo Documentation.

    Q3: Which RAID controllers are supported?
    A3: Broadcom 12 Gbps SAS RAID adapters (0/1/5/10/50) with up to 4 GB cache, plus software RAID and VROC/VMD for NVMe boot volumesLenovo Press.

    Q4: How does XClarity simplify management?
    A4: Embedded XClarity Controller provides agent-free monitoring and alerts; XClarity Administrator centralizes 1:many firmware updates, provisioning, and power management, reducing manual setup by up to 95 %Lenovo.

    Q5: What reliability features are included?
    A5: Predictive Failure Analysis for all major components, light-path LEDs for diagnostics, hot-swap drives/PSUs/fans, and ASHRAE A4 support ensure continuous operationLenovo Press.

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