IBM Lenovo ThinkSystem SR655 Rack Server Over

The IBM Lenovo ThinkSystem SR655 is a 1U, single-socket rack server designed to deliver outstanding performance, storage, and I/O flexibility for modern workloads. Powered by the latest AMD EPYC™ processors, the SR655 is ideal for virtualization, VDI, software-defined storage (SDS), and edge-to-core deployments where space and compute efficiency matter.

High-Core Density with AMD EPYC Power

The SR655 supports one AMD EPYC™ 7002, 7003, or 9004 Series processor with up to 96 cores, delivering impressive compute density in a single socket design. With a high number of PCIe lanes and memory channels, it eliminates bottlenecks and delivers exceptional throughput for data-hungry workloads.

Memory Capacity and Bandwidth

Support for up to 16 DDR4 or DDR5 RDIMM slots (depending on CPU generation) allows the SR655 to scale up to 2TB of memory. High memory bandwidth and support for advanced memory technologies make it ideal for virtual environments and data analytics.

Flexible Storage Configuration

The SR655 is built to support various storage-intensive workloads with a flexible storage configuration, including:

• Up to 16 x 2.5” SAS/SATA/NVMe drives or

• Up to 8 x 3.5” SAS/SATA drives

• Optional M.2 boot drive support for OS installation

• RAID controller and HBA options for performance and redundancy

This flexibility makes the SR655 well-suited for media streaming, content delivery, SDS, and backup systems.

PCIe Expansion and GPU Support

With up to 6 PCIe Gen4 slots (depending on riser configuration), the SR655 supports a wide range of high-speed I/O cards and accelerators. It accommodates up to 3 single-width or 1 double-width GPU, making it suitable for AI inference, video rendering, and graphics-intensive applications.

Thermal and Power Optimization

The SR655 features Lenovo’s advanced thermal design and adjustable fan zones, ensuring optimal cooling and energy efficiency. Designed for environments requiring continuous high-performance output, it balances cooling with power savings.

Security and Resilience

Lenovo ThinkShield security includes:

• Root of trust and secure BIOS

• Tamper detection

• Firmware integrity checking

• TPM 2.0 and optional physical security features

These capabilities provide a strong foundation for secure deployment in enterprise and edge environments.

Simplified Systems Management

Lenovo XClarity Controller and XClarity Administrator offer a user-friendly interface for:

• Server health monitoring

• Remote deployment and updates

• Hardware alerting and diagnostics

• Centralized control of multi-node environments

This helps reduce IT management complexity and operational costs.

Configuration Tips

• Opt for AMD EPYC 9004 Series CPUs for future-ready performance

• Choose NVMe storage for low-latency, high-throughput applications

• Add single- or dual-width GPU options to accelerate workloads like VDI and AI

• Use Lenovo RAID or HBA controllers for redundancy and performance balance

Ideal Workloads

• Virtualization and VDI

• Software-defined storage (SDS)

• Video surveillance and streaming

• Edge analytics and content delivery

• Backup and archiving

• AI/ML inference and GPU-assisted processing