Lenovo 7Z01A02CEA User Manual

Lenovo ThinkSystem SR655 Server

Product Guide

The Lenovo ThinkSystem SR655 is a 1-socket 2U server that features the new AMD EPYC 7002 "Rome" family of processors. With up to 64 cores per processor and support for the new PCIe 4.0 standard for I/O, the SR655 offers the ultimate in single-socket server performance. With up to 128 PCIe lanes, the server is ideal for workloads that can take advantage of GPU processing and high-performance NVMe drives.

Suggested uses: AI Inference, VDI, OLTP, Analytics, software-defined storage

Figure 1. Lenovo ThinkSystem SR655

Did you know?

By using a high-performance server with only one processor installed, you can take advantage of lower software costs when the software licensing is using a per-socket model.

The SR655 has been designed to take advantage of the features of the EPYC 7002 "Rome" processors, such as the full performance of 225W 64-core processors, support for 3200 MHz memory and PCIe Gen

4.0 support. Competitive servers that are based on the older EPYC 7001 "Naples" designs may not be able to offer these performance features.

Click here to check for updates

Lenovo ThinkSystem SR655 Server 1

Key features

Combining performance and flexibility, the SR655 server is a great choice for enterprises of all sizes. The server offers a broad selection of drive and slot configurations and offers high performance features that industries such as finance, healthcare and telco need. Outstanding reliability, availability, and serviceability (RAS) and high-efficiency design can improve your business environment and can help save operational costs.

Scalability and performance

The SR655 offers numerous features to boost performance, improve scalability and reduce costs:

Supports the new AMD EPYC 7002 family of processors

Supports processors with up to 64 cores and 128 threads, core speeds of up to 3.2 GHz, and TDP ratings of up to 225W.

Support for up to 16 TruDDR4 memory DIMMs, with 8 memory channels and 2 DIMMs per channel. With 1 DIMM installed per channel (8 DIMMs total), memory operates at up to 3200 MHz. With 2 DIMMs per channel (16 DIMMs total), memory operating at up to 2933 MHz.

Using 64GB DIMMs, the server supports up to 1TB of system memory.

Supports 3 double-width GPUs up to 300W each, or 6 single-width GPUs up to 75W each. A 6:1 ratio of GPUs to CPUs means substantial processing power is available with just one CPU.

Supports up to 32x 2.5-inch hot-swap drive bays, by using combinations of front-accessible (up to 24 bays), mid-accessible (up to 8), and rear-accessible (up to 4) drive bays.

Supports 3.5-inch drive bays for lower-cost high-capacity storage. 2.5-inch and 3.5-inch drive bays can be mixed in several combinations.

Supports 16x SATA drives using the onboard SATA controller (no additional adapter needed), enabling lower cost, high capacity storage solution for cold storage workloads.

Supports up to 16x NVMe drives without oversubscription of PCIe lanes (1:1 connectivity), or up to 32x NVMe drives with a 2:1 oversubscription. Planned support of up to 28x NVMe drives without oversubscription. The use of NVMe drives maximizes drive I/O performance, in terms of throughput, bandwidth, and latency.

Supports high-speed RAID controllers from Broadcom providing 12 Gb SAS connectivity to the drive backplanes. A variety of RAID adapters are available, with cache and support for up to 24 drives on a single controller.

Supports M.2 drives for convenient operating system boot functions or data storage. Available M.2 adapters support either one M.2 drive or two M.2 drives in a RAID 1 configuration for performance and reliability.

The server has a dedicated industry-standard OCP 3.0 small form factor (SFF) slot, with a PCIe 4.0 x16 interface, supporting a variety of Ethernet network adapters. Simple-swap mechanism with thumbscrews and pull-tab enables tool-less installation and removal of the adapter. Supports shared BMC network sideband connectivity to enable out-of-band systems management.

The server offers PCI Express 4.0 I/O expansion capabilities that doubles the theoretical maximum bandwidth of PCIe 3.0 (16GT/s in each direction for PCIe 4.0, compared to 8 GT/s with PCIe 3.0). A PCIe 4.0 x16 slot provides 64 GB/s bandwidth, enough to support a 400GbE network connection.

A total of up to 9 PCIe 4.0 slots (8 with rear access, 1 internal for a RAID adapter) plus a slot dedicated to the OCP adapter.

Lenovo ThinkSystem SR655 Server 2

Availability and serviceability

The SR655 provides many features to simplify serviceability and increase system uptime:

The server uses ECC memory and supports memory RAS features including Single Device Data Correction (SDDC, also known as Chipkill), Patrol/Demand Scrubbing, DRAM Address Command Parity with Replay, and DRAM Uncorrected ECC Error Retry.

The server offers hot-swap drives, supporting RAID redundancy for data protection and greater system uptime.

The M.2 SATA RAID Boot Adapter supports RAID-1 which enables two installed M.2 drives to be configured as a redundant pair.

The server has up to two hot-swap redundant power supplies and six hot-swap redundant fans to provide availability for business-critical applications.

The power-source-independent light path diagnostics uses LEDs to lead the technician to failed (or failing) components, which simplifies servicing, speeds up problem resolution, and helps improve system availability.

Solid-state drives (SSDs) offer more reliability than traditional mechanical HDDs for greater uptime.

The built-in ASPEED AST2500 baseboard management controller (BMC) continuously monitors system parameters, triggers alerts, and performs recovery actions in case of failures to minimize downtime.

Proactive Platform Alerts: Voltage regulators, memory, fans, power supplies, server ambient and subcomponent temperatures. Alerts can be surfaced through the BMC to managers such as Lenovo XClarity Administrator. These proactive alerts let you take appropriate actions in advance of possible failure, thereby increasing server uptime and application availability.

Web-based ThinkSystem System Manager (TSM) provides remote access to the BMC for remote management.

Lenovo XClarity Provisioning Manager Lite (LXPM Lite) tool can be used to install an operating system on the server and perform system diagnostics.

Three-year or one-year customer-replaceable unit and onsite limited warranty, 9 x 5 next business day. Optional service upgrades are available.

Manageability and security

Systems management features simplify local and remote management of the SR655:

Supports Lenovo XClarity Provisioning Manager Lite (LXPM Lite) for system setup and firmware upgrades.

An integrated industry-standard Unified Extensible Firmware Interface (UEFI) enables improved setup, configuration, and updates, and simplifies error handling.

Support for industry standard management protocols, IPMI 2.0, SNMP 3.0, Redfish REST API, serial console via IPMI

An integrated hardware Trusted Platform Module (TPM) supporting TPM 2.0 enables advanced cryptographic functionality, such as digital signatures and remote attestation.

Administrator and power-on passwords help protect from unauthorized access to the server.

Support for Lenovo XClarity Energy Manager, which captures real-time power and temperature data from the server and integrates with Redfish-based applications to provide automated controls to lower energy costs.

Supports AMD Secure Root-of-Trust, Secure Run and Secure Move features to minimize potential attacks and protect data as the OS is booted, as applications are run and as applications are migrated from server to server.

Supports Secure Boot to ensure only a digitally signed operating system can be used.

Lenovo ThinkSystem SR655 Server 3

Industry-standard Advanced Encryption Standard (AES) NI support for faster, stronger encryption.

Energy efficiency

The SR655 offers the following energy-efficiency features to save energy, reduce operational costs, and increase energy availability:

Energy-efficient planar components help lower operational costs.

High-efficiency power supplies with 80 PLUS Platinum and Titanium certifications

Low-voltage 1.2 V DDR4 memory offers energy savings compared to 1.35 V and 1.5 V DDR3 DIMMs.

Solid-state drives (SSDs) consume as much as 80% less power than traditional spinning 2.5-inch HDDs.

The server uses hexagonal ventilation holes, which can be grouped more densely than round holes, providing more efficient airflow through the system and thus keeping your system cooler.

Optional Lenovo XClarity Energy Manager provides power and thermal monitoring to help achieve lower heat output and reduced cooling needs.

Lenovo ThinkSystem SR655 Server 4

Components and connectors

The following figure shows the front of the server.

Figure 2. Front view of the Lenovo ThinkSystem SR655

The following figure shows the components visible from the rear of the server. As shown, there are three different configurations available

Figure 3. Rear view of the Lenovo ThinkSystem SR655

Lenovo ThinkSystem SR655 Server 5

The following figure shows the locations of key components inside the server.

Figure 4. Internal view of the Lenovo ThinkSystem SR655

Lenovo ThinkSystem SR655 Server 6

System architecture

The following figure shows the architectural block diagram of the SR655, showing the major components and their connections.

Figure 5. SR655 system architectural block diagram

* Riser 1 has a x16 system board connection. For 32 lanes, the riser receives 16 lanes from two x8 onboard slimline connectors via cables ** Riser 3 and Internal slot are connected to onboard connectors; no system board slots

Standard specifications

The following table lists the standard specifications.

Table 1. Standard specifications

Components Specification

Machine types

7Y00 - 1 year warranty 7Z01 - 3 year warranty

Form factor 2U rack.

Processor One AMD EPYC 7002 Series processor (formerly codenamed "Rome"). Supports processors up to

64 cores, core speeds of up to 3.2 GHz, and TDP ratings of up to 225W.

Memory 16 DIMM slots. The processor has 8 memory channels, with 2 DIMMs per channel. Lenovo

TruDDR4 RDIMMs are supported. DIMMs are available in two speeds: 3200 MHz and 2933 MHz. With 3200 MHz memory, the server supports a 3200 MHz memory bus speed at 1 DIMM per channel (DPC) and 2933 MHz at 2 DPC. With 2933 MHz memory, the server supports a 2933 MHz memory bus speed at both 1 and 2 DPC.

Memory maximum

Up to 1TB with 16x 64GB RDIMMs

Persistent memory

Not supported.

Lenovo ThinkSystem SR655 Server 7

Memory protection

ECC, SDDC, Patrol/Demand Scrubbing, DRAM Address Command Parity with Replay, DRAM Uncorrected ECC Error Retry, Post Package Repair

Disk drive bays

Up to 20x 3.5-inch or 32x 2.5-inch hot-swap drive bays:

Front: up to 12x 3.5-inch or 24x 2.5-inch, hot-swap bays Mid (internal): up to 4x 3.5-inch or 8x 2.5-inch, hot-swap bays Rear: up to 4x 3.5-inch or 4x 2.5-inch hot-swap bays

With 2.5-inch drive bays, mid (internal) bays and rear drives are mutually exclusive. See Supported

drive bay combinations for details. Mid bays are hot-swap drive bays and are accessible by

removing the top cover of the server. 4x 3.5-inch front drive bays can be configured as AnyBay supporting SAS, SATA or NVMe. 2.5-inch drive bays can be configured as NVMe, supporting 28x NVMe drives with direct connections (no oversubscription), or 32x NVMe drives with 2:1 oversubscription.

Maximum internal storage

All NVMe: 184.32 TB using 24x 6.4 TB NVMe (front) + 8x 3.84TB NVMe SSDs (mid) All SSDs: 245.76 TB using 32x 7.68TB SSDs (24x front, 8x mid) All HDDs: 280 TB using 20x 14TB 3.5-inch HDDs (12x front, 4x mid, 4x rear) Mix of SSDs/HDDs supported but not in the same array

Storage controller

Onboard SATA supporting up to 16 SATA drives (no RAID)

12 Gb SAS/SATA RAID adapters:

RAID 530i (cacheless) supports RAID 0, 1, 10, 5, 50 RAID 730-8i with 1GB cache supports RAID 0, 1, 10, 5, 50 RAID 730-8i with 2GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60 RAID 930-8i with 2GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60 RAID 930-16i and 24i with 4GB or 8GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60

12 Gb SAS/SATA non-RAID: 430-8i and 430-16i HBAs

Optical drive bays

No internal optical drive.

Tape drive bays

No internal backup drive.

Network interfaces

Dedicated OCP 3.0 SFF slot with PCIe 4.0 x16 host interface. Supports a variety of 2-port and 4port adapters with 1GbE, 10GbE and 25GbE network connectivity. One port can optionally be shared with the ASPEED management processor for Wake-on-LAN and NC-SI support.

Components Specification

Lenovo ThinkSystem SR655 Server 8

PCI Expansion slots

A total of up to 9 PCIe 4.0 slots (8 with rear access, 1 internal for a RAID adapter) plus a slot dedicated to the OCP adapter. Slot availability is based on riser selection.

Slot length is dependent on the use of a mid-chassis drive cage: If the mid drive cage is present then slots are half-length; if the mid drive cage is not present, then slots are full-length.

Riser 1: Slots 1, 2 and 3 - all FHHL or FHFL (16 or 32 lanes)

Option 1*: 1=x16, 2=x8, 3=x8 Option 2*: 1=x16, 2=x16 (no slot 3) Option 3: 3=x16 (no slot 1 or slot 2) Option 4: 1=x16 (no slot 2 or slot 3)

Riser 2: Slots 4, 5, and 6 - slot size varies (32 lanes)

Option 1: 4=x16, 5=x8, 6=x8 Option 2: 4=x16, 5=x16 (no slot 6) Option 3: 6=x16 (no slot 4 or slot 5)

Riser 3: Slots 7 and 8 - both FHHL or FHFL (16 or 32 lanes)

Option 1*: 7=x8, 8=x8 Option 2*: 7=x16, 8=x16

Slot 9: Internal PCIe 4.0 x8 low-profile slot for internal drive controller

* The use of 32 lanes with Riser 1 or the use of Riser 3 imposes restrictions on the use of the onboard SATA controller or the use of the M.2 Module or both. See the I/O expansion section for details.

Ports Front: Two USB 3.1 G1 (5 Gb/s) ports, optional VGA port.

Rear: USB 3.1 G1 (5 Gb/s) ports, one VGA video port, one DB-9 serial port, and one RJ-45 1GbE systems management port.

Internal: Optional M.2 module supporting up to two M.2 drives (for OS boot and drive storage support; not available in all configurations).

Cooling Five or six N+1 redundant hot swap 60 mm fans, configuration dependent. One fan integrated in

each power supply.

Power supply Up to two hot-swap redundant AC power supplies (all 80 PLUS Platinum certification): 550 W,

750 W, 1100 W and 1600 W AC options, supporting 220 V AC. 550 W, 750 W and 1100 W options also support 110V input supply. In China only, all power supply options support 240 V DC.

Video Onboard graphics with 512 MB memory with 2D hardware accelerator, integrated into the ASPEED

AST2500 BMC management processor. Maximum resolution is 1920x1200 at 60Hz, 32bpp

Hot-swap parts

Drives, power supplies, and fans.

Systems management

ASPEED AST2500 embedded management processor, XClarity Provisioning Manager Lite (LXPM Lite) for system setup and firmware upgrades. XClarity Administrator centralized infrastructure management, and XClarity Energy Manager centralized server power management. Light path diagnostics for local failure detection and reporting.

Security features

Power-on password, administrator's password, Trusted Platform Module (TPM), supporting TPM

2.0. In China only, optional Nationz TPM 2.0. Optional lockable front security bezel. Planned support for a chassis intrusion switch.

Operating systems supported

Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi. See the Operating system support section for specifics.

Limited warranty

Three-year or one-year (model dependent) customer-replaceable unit and onsite limited warranty with 9x5 next business day (NBD).

Components Specification

Lenovo ThinkSystem SR655 Server 9

Service and support

Optional service upgrades are available through Lenovo Services: 4-hour or 2-hour response time, 6-hour fix time, 1-year or 2-year warranty extension, software support for Lenovo hardware and some third-party applications.

Dimensions Height: 86 mm (3.4 in.), width: 445 mm (17.5 in.), depth: 765 mm (30.1 in.)

Weight Maximum: 35.4 kg (78.0 lb)

Components Specification

Models

Models of the SR655 are defined based on whether the server has 2.5-inch drive bays at the front (called the 24x 2.5" chassis) or whether it has 3.5-inch drive bays at the front (called the 12x 3.5" chassis). For models, the feature codes for these chassis bases are as listed in the following table.

Table 2. Chassis base feature codes

Feature code Description

B5VK ThinkSystem SR655 12x3.5" Chassis

B5VJ ThinkSystem SR655 24x2.5" Chassis

The following tables list the available models, grouped by region.

Models for Australia and New Zealand Models for South East Asian regions (ASEAN) Models for EMEA regions Models for Hong Kong, Taiwan, Korea (HTK) Models for India Models for Japan Models for USA and Canada

Refer to the Specifications section for information about standard features of the server.

Lenovo ThinkSystem SR655 Server 10

Models for Australia and New Zealand

Table 3. Models for Australia and New Zealand

Model

AMD EPYC processor† Memory RAID Drive bays OCP Slots*

Power supplies

Power cords

Front VGA Fans

Rail kit

TopSeller models with a 3-year model (machine type 7Z01)

7Z01A02MAU 7302P 16C

155W 3.0GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Std

Fric

7Z01A02XAU 7302P 16C

155W 3.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Std

Fric

7Z01A02LAU 7402P 24C

180W 2.8GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A039AU 7402P 24C

180W 2.8GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A030AU 7502P 32C

180W 2.5GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A031AU 7502P 32C

180W 2.5GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02UAU 7702P 64C

200W 2.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02VAU 7702P 64C

200W 2.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

† Processor description: AMD EPYC model, number of cores, thermal design power (TDP), core frequency * Slots are listed as (x, y, z) where x = number of rear-accessible x16 slots, y = number of rear-accessible x8 slots, z = number of internal x8 slots

Lenovo ThinkSystem SR655 Server 11

Models for South East Asian regions (ASEAN)

Table 4. Models for South East Asian regions (ASEAN)

Model

AMD EPYC processor† Memory RAID Drive bays OCP Slots*

Power supplies

Power cords

Front VGA Fans

Rail kit

TopSeller models with a 3-year model (machine type 7Z01)

7Z01A036SG 7302P 16C

155W 3.0GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Std

Fric

7Z01A03ASG 7302P 16C

155W 3.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Std

Fric

7Z01A02TSG 7402P 24C

180W 2.8GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A033SG 7402P 24C

180W 2.8GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02QSG 7502P 32C

180W 2.5GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02YSG 7502P 32C

180W 2.5GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A034SG 7702P 64C

200W 2.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A03BSG 7702P 64C

200W 2.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

Lenovo ThinkSystem SR655 Server 12

Models for EMEA regions

Table 5. Models for EMEA regions

Model

AMD EPYC processor† Memory RAID Drive bays OCP Slots*

Power supplies

Power cords

Front VGA Fans

Rail kit

Standard models with a 3-year model (machine type 7Z01)

7Z01A02BEA 7262 8C

155W

3.2GHz

1x 32GB 3200

Onboard AHCI

12x 3.5" SAS Open bay

Open Open 1x 750W Yes Opt 5x

Std

Slide

7Z01A02DEA 7262 8C

155W

3.2GHz

1x 32GB 3200

Option Optional 2.5"

Open bay

Open Open 1x 750W Yes Opt 5x

Std

Slide

7Z01A02AEA 7302P 16C

155W

3.0GHz

1x 32GB 3200

Onboard AHCI

12x 3.5" SAS Open bay

Open Open 1x 750W Yes Opt 5x

Std

Slide

7Z01A02CEA 7302P 16C

155W

3.0GHz

1x 32GB 3200

Option Optional 2.5"

Open bay

Open Open 1x 750W Yes Opt 5x

Std

Slide

7Z01A029EA 7452 32C

155W

2.35GHz

1x 32GB 3200

Onboard AHCI

12x 3.5" SAS Open bay

Open Open 1x 750W Yes Opt 5x

Std

Slide

7Z01A02EEA 7502P 32C

180W

2.5GHz

1x 32GB 3200

Option 16x 2.5" NVMe

Open bay

Open Open 1x

1100W

Yes Opt 5x

Perf

Slide

7Z01A02HEA 7502P 32C

180W

2.5GHz

1x 32GB 3200

Option Optional 2.5"

Open bay

Open Open 1x 750W Yes Opt 5x

Perf

Slide

7Z01A02FEA 7702P 64C

200W

2.0GHz

1x 32GB 3200

Option Optional 2.5"

Open bay

Open Open 1x

1100W

Yes Opt 5x

Perf

Slide

7Z01A02GEA 7742 64C

225W

2.25GHz

1x 32GB 3200

Option Optional 2.5"

Open bay

Open Open 1x

1100W

Yes Opt 5x

Perf

Slide

Models for Hong Kong, Taiwan, Korea (HTK)

Table 6. Models for Hong Kong, Taiwan, Korea (HTK)

Model

AMD EPYC processor† Memory RAID Drive bays OCP Slots*

Power supplies

Power cords

Front VGA Fans

Rail kit

TopSeller models with a 3-year model (machine type 7Z01)

7Z01A035CN 7302P 16C

155W 3.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Std

Fric

7Z01A02KCN 7402P 24C

180W 2.8GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02SCN 7502P 32C

180W 2.5GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02ZCN 7702P 64C

200W 2.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

Lenovo ThinkSystem SR655 Server 13

Models for India

Table 7. Models for India

Model

AMD EPYC processor† Memory RAID Drive bays OCP Slots*

Power supplies

Power cords

Front VGA Fans

Rail kit

TopSeller models with a 3-year model (machine type 7Z01)

7Z01A02PSG 7302P 16C

155W 3.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Std

Fric

7Z01A02WSG 7302P 16C

155W 3.0GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Std

Fric

7Z01A032SG 7402P 24C

180W 2.8GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A038SG 7402P 24C

180W 2.8GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02RSG 7502P 32C

180W 2.5GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A037SG 7502P 32C

180W 2.5GHz

1x 32GB 3200

730-8i 2GB

8x 3.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02JSG 7702P 64C

200W 2.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

7Z01A02NSG 7702P 64C

200W 2.0GHz

1x 32GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 2x 750W Yes Yes 6x

Perf

Fric

Lenovo ThinkSystem SR655 Server 14

Models for Japan

Table 8. Models for Japan

Model

AMD EPYC processor† Memory RAID Drive bays OCP Slots*

Power supplies

Power cords

Front VGA Fans

Rail kit

TopSeller models with a 3-year model (machine type 7Z01)

7Z01A03GJP 7262 8C 155W

3.2GHz

1x 16GB 3200

530-8i 8x 2.5" SAS

Open bay

4x1Gb 1, 2, 1 1x 750W Opt Opt 6x

Std

Slide

7Z01A03MJP 7262 8C 155W

3.2GHz

1x 16GB 3200

530-8i 8x 3.5" SAS

Open bay

4x1Gb 1, 2, 1 1x 750W Opt Opt 6x

Std

Slide

7Z01A03HJP 7302P 16C

155W 3.0GHz

1x 16GB 3200

530-8i 8x 3.5" SAS

Open bay

4x1Gb 1, 2, 1 1x 750W Opt Opt 6x

Std

Slide

7Z01A03KJP 7302P 16C

155W 3.0GHz

1x 16GB 3200

530-8i 8x 2.5" SAS

Open bay

4x1Gb 1, 2, 1 1x 750W Opt Opt 6x

Std

Slide

7Z01A03FJP 7502P 32C

180W 2.5GHz

1x 16GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 1x 750W Opt Opt 6x

Perf

Slide

7Z01A03NJP 7702P 64C

200W 2.0GHz

1x 16GB 3200

730-8i 2GB

8x 2.5" SAS Open bay

4x1Gb 1, 2, 1 1x 750W Opt Opt 6x

Perf

Slide

Models for USA and Canada

Table 9. Models for USA and Canada

Model

AMD EPYC processor† Memory RAID Drive bays OCP Slots*

Power supplies

Power cords

Front VGA Fans

Rail kit

Standard models with a 3-year model (machine type 7Z01)

7Z01A03DNA 7302P 16C

155W 3.0GHz

1x 8GB 2933

Option Optional 2.5"

Open bay

Open Open 1x 750W Yes Yes 5x

Std

Slide

7Z01A03JNA 7502P 32C

180W 2.5GHz

1x 32GB 3200

Option Optional 2.5"

Open bay

Open Open 1x 750W Yes Yes 5x

Perf

Slide

7Z01A03LNA 7702P 64C

200W 2.0GHz

1x 32GB 3200

Option Optional 2.5"

Open bay

Open Open 1x 750W Yes Yes 5x

Perf

Slide

TopSeller models with a 3-year model (machine type 7Z01)

7Z01A03CNA 7302P 16C

155W 3.0GHz

1x 16GB 3200

Option Optional 2.5"

Open bay

Open Open 1x 750W Yes Yes 5x

Std

Slide

7Z01A03ENA 7402P 24C

180W 2.8GHz

1x 32GB 3200

Option Optional 2.5"

Open bay

Open Open 1x 750W Yes Yes 5x

Perf

Slide

Lenovo ThinkSystem SR655 Server 15

Processor options

The SR655 supports processors in the second-generation AMD EPYC family of processors. The server supports one processor.

The table below lists the supported AMD processors.

All supported processors have the following characteristics:

Second-generation AMD EPYC processors (formerly codenamed "Rome") 7 nm process technology Eight DDR4 memory channels 128 PCIe 4.0 I/O lanes

Part numbers : Processors do not include an option part number because there are no field upgrades supported.

Table 10. Processor options for the SR655

Feature code Description

B6TS ThinkSystem AMD EPYC 7262 8C 155W 3.2GHz Processor

B6TV ThinkSystem AMD EPYC 7302 16C 155W 3.0GHz Processor

B6VV ThinkSystem AMD EPYC 7302P 16C 155W 3.0GHz Processor

B6VW ThinkSystem AMD EPYC 7402 24C 180W 2.8GHz Processor

B6TT ThinkSystem AMD EPYC 7402P 24C 180W 2.8GHz Processor

B6TU ThinkSystem AMD EPYC 7452 32C 155W 2.35 GHz Processor

B5XG ThinkSystem AMD EPYC 7502 32C 180W 2.5GHz Processor

B6VX ThinkSystem AMD EPYC 7502P 32C 180W 2.5GHz Processor

B6TR ThinkSystem AMD EPYC 7702 64C 200W 2.0GHz Processor

B6VY ThinkSystem AMD EPYC 7702P 64C 200W 2.0GHz Processor

B5XF ThinkSystem AMD EPYC 7742 64C 225W 2.25 GHz Processor

Processor features

The following table lists the features of the supported processors.

P suffix: Processor models with a P suffix are designated as single-socket processors. They have identical features to the non-P equivalent processors.

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Table 11. Processor specifications

EPYC model

Cores / Threads

Base Frequency

Max Boost Frequency† L3 Cache

Memory channels

Memory bus TDP

7262 8 / 16 3.2 GHz 3.40 GHz 128 MB 8 3200 MHz 155W

7302 16 / 32 3.0 GHz 3.30 GHz 128 MB 8 3200 MHz 155W

7302P 16 / 32 3.0 GHz 3.30 GHz 128 MB 8 3200 MHz 155W

7402 24 / 48 2.8 GHz 3.35 GHz 128 MB 8 3200 MHz 180W

7402P 24 / 48 2.8 GHz 3.35 GHz 128 MB 8 3200 MHz 180W

7452 32 / 64 2.35 GHz 3.35 GHz 128 MB 8 3200 MHz 155W

7502 32 / 64 2.5 GHz 3.35 GHz 128 MB 8 3200 MHz 180W

7502P 32 / 64 2.5 GHz 3.35 GHz 128 MB 8 3200 MHz 180W

7702 64 / 128 2.0 GHz 3.35 GHz 256 MB 8 3200 MHz 200W

7702P 64 / 128 2.0 GHz 3.35 GHz 256 MB 8 3200 MHz 200W

7742 64 / 128 2.25 GHz 3.40 GHz 256 MB 8 3200 MHz 225W

† The maximum single-core frequency at with the processor is capable of operating

Memory options

The server uses Lenovo TruDDR4 memory operating at up to 3200 MHz. The processors have 8 memory channels and support 2 DIMMs per channel, for a total of 16 DIMMs.

The server supports up to 1TB of memory using 16x 64 GB RDIMMs.

The server supports these memory DIMMs:

2933 MHz DIMMs, that operate at 2933 MHz both at 1 DIMM per channel and 2 DIMMs per channel

3200 MHz DIMMs, that operate at 3200 MHz at 1 DIMM per channel, and at 2933 MHz at 2 DIMMs per channel

Note that if the processor selected has a memory bus speed of 2666 MHz, then all DIMMs will operate at 2666 MHz, even if the DIMMs are rated for a higher speed MHz.

The following table lists the memory options that are available for the server.

Lenovo TruDDR4 memory uses the highest quality components that are sourced from Tier 1 DRAM suppliers and only memory that meets the strict requirements of Lenovo is selected. It is compatibility tested and tuned to maximize performance and reliability. From a service and support standpoint, Lenovo TruDDR4 memory automatically assumes the system warranty, and Lenovo provides service and support worldwide.

Lenovo ThinkSystem SR655 Server 17

Table 12. Supported memory options

Part number

Feature code Description

Maximum supported

Memory vendor

2933 MHz memory

4ZC7A08739 B7MS ThinkSystem 8GB TruDDR4 2933MHz (1Rx8 1.2V) RDIMM-A 16 Micron

4ZC7A08740 B7MT ThinkSystem 16GB TruDDR4 2933MHz (1Rx4 1.2V) RDIMM-A 16 Hynix

4ZC7A08741 B7MU ThinkSystem 16GB TruDDR4 2933MHz (2Rx8 1.2V) RDIMM-A 16 Hynix

4ZC7A08742 B7MV ThinkSystem 32GB TruDDR4 2933MHz (2Rx4 1.2V) RDIMM-A 16 Samsung

4ZC7A08744 B7MW ThinkSystem 64GB TruDDR4 2933MHz (2Rx4 1.2V) RDIMM-A 16 Samsung

3200 MHz memory

4ZC7A15121 B5XD ThinkSystem 16GB TruDDR4 3200MHz (2Rx8 1.2V) RDIMM-A 16 Micron

4ZC7A15122 B5XE ThinkSystem 32GB TruDDR4 3200MHz (2Rx4 1.2V) RDIMM-A 16 Samsung

4ZC7A15124 B5XC ThinkSystem 64GB TruDDR4 3200MHz (2Rx4 1.2V) RDIMM-A 16 Hynix

The following rules apply when selecting the memory configuration:

The server currently supports only RDIMMs.

Mixing of DIMM vendor is supported, but not in the same channel (see the table above)

Mixing x4 and x8 DIMMs is supported, but not in the same channel

Mixing of DIMM rank counts is supported. Follow the required installation order installing the DIMMs with the higher rank counts first.

Mixing of DIMM capacities is supported, however only two different capacities are supported all channels of the processor (eg 32GB and 64GB). Follow the required installation order installing the larger DIMMs first.

Mixing of 3200 MHz and 2933 MHz DIMMs is supported, but not in the same channel

Memory mirroring and memory rank sparing are not supported.

For best performance, consider the following:

Ensure the memory installed is at least the same speed as the memory bus of the selected processor.

Populate memory DIMMs in quantities of 8 or 16, so that all memory channels are used.

Populate memory channels so they all have the same total memory capacity.

The following memory protection technologies are supported:

ECC detection/correction SDDC (for x4-based memory DIMMs; look for "x4" in the DIMM description) Patrol/Demand Scrubbing DRAM Address Command Parity with Replay DRAM Uncorrected ECC Error Retry Post Package Repair

Lenovo ThinkSystem SR655 Server 18

Internal storage

The SR655 supports up to 20x 3.5-inch or 32x 2.5-inch drive bays, depending on the selected chassis and backplane configuration. Drives can be all SAS, all SATA, or all NVMe, or combinations of all three (not in the same RAID array, if configured). The server also supports configurations without any drive bays if desired.

All drives are hot-swap and are accessible from the front, from the rear, or from drive bays that are located in the middle of the server (accessible when you remove the top cover of the server).

The three drive zones are as follows:

Front: up to 12x 3.5-inch or 24x 2.5-inch, hot-swap bays

Mid (internal): up to 4x 3.5-inch or 8x 2.5-inch, hot-swap bays

Rear: up to 4x 3.5-inch or 4x 2.5-inch hot-swap bays

The server also supports one or two M.2 drives, installed in an M.2 adapter.

In this section:

NVMe drive support Front drive bays Mid drive bays Rear drive bays Supported drive bay combinations Adapters selections Field upgrades M.2 drives

NVMe drive support

No hot-swap support: The PM983 NVMe drives currently do not support hot-swap functionality. An

update to UEFI firmware to fix this restriction is planned for 4Q/2019. See support tip HT509092 for details.

The SR655 supports NVMe drives to maximize storage performance, as follows:

Up to 16 NVMe drives without oversubscription (that is, each x4 drive has a full x4 (4 lanes) connection to the processor)

16 NVMe drives in the front bays

Support planned in 4Q/2019 for up to 28 NVMe drives without oversubscription (that is, each x4 drive has a full x4 (4 lanes) connection to the processor)

24 NVMe drives in the front bays 4 NVMe drives in the rear bays

Up to 32 NVMe drives with a 2:1 oversubscription (that is, each x4 drive has a x2 connection (2 lanes) to the processor)

24 NVMe drives in the front bays 8 NVMe drives in the mid bays

Up to 4x NVMe drives in a 3.5-inch drive configuration

All installed in front bays

The specifics of these configurations plus other NVMe-rich configurations are covered in the Supported

drive bay combinations and Adapters selections sections.

15mm NVMe drives : 15mm NVMe SSDs are not supported in the mid or rear drive bays due to thermal requirements. Only 7mm NVMe drives are supported in those zones.

Lenovo ThinkSystem SR655 Server 19

Front drive bays

The front drive bay zone supports the following configurations:

3.5-inch drive bays No drives and no backplane (supports field upgrades) 8x 3.5-inch SAS/SATA (no upgrades) 12x 3.5-inch SAS/SATA (no upgrades) 8x 3.5-inch SAS/SATA + 4x 3.5-inch AnyBay (AnyBay supports SAS or SATA or NVMe drives) (no upgrades)

2.5-inch drive bays No drives and no backplane (supports field upgrades) 8x 2.5-inch SAS/SATA (supports field upgrades to 16 or 24 drives) 16x 2.5-inch SAS/SATA (supports field upgrades to 24 drives) 24x 2.5-inch SAS/SATA (no upgrades) 8x 2.5-inch NVMe (supports field upgrades to 16 or 24 drives) 16x 2.5-inch NVMe (supports field upgrades to 24 drives) 24x 2.5-inch NVMe (no upgrades) 8x 2.5-inch NVMe + 8x 2.5-inch SAS/SATA (supports upgrade to 16x SAS/SATA) 8x 2.5-inch NVMe + 16x 2.5-inch SAS/SATA (no upgrades)

These configurations are shown in the following figure.

Figure 6. SR655 front drive bay configurations

The backplanes used to provide these drive bays are listed in the following table.

Lenovo ThinkSystem SR655 Server 20

Table 13. Backplanes for front drive bays

Part number

Feature code Description

Maximum supported

Front 3.5-inch drive backplanes

See note* AUR6 ThinkSystem 2U 3.5" SATA/SAS 8-Bay Backplane

(8-bay 3.5-inch SAS/SATA backplane)

See note* AUR9 ThinkSystem 2U 3.5" SATA/SAS 12-Bay Backplane

(12-bay 3.5-inch SAS/SATA backplane)

See note* AUR8 ThinkSystem 2U 3.5" AnyBay 12-Bay Backplane

(12-bay 3.5-inch backplane with 8x SAS/SATA bays + 4x AnyBay bays†)

Front 2.5-inch drive backplanes

See note* AURA ThinkSystem 2U/Twr 2.5" SATA/SAS 8-Bay Backplane

(8-bay 2.5-inch SAS/SATA backplane)

See note* B4PC ThinkSystem 2U 2.5" NVMe 8-Bay Backplane

(8-bay 2.5-inch NVMe backplane)

* Backplanes are available as part numbers for field upgrades using upgrade kits, as described in the Field

upgrades section below.

† AnyBay bays support SAS or SATA or NVMe drives

The use of NVMe drives may limit the use of PCIe slots or M.2 drives as described in the I/O expansion section.

Mid drive bays

The SR655 supports hot-swap drives installed in the middle of the server chassis. The drive bays are accessible by removing the top lid of the server and levering the mid drive chassis.

The following configurations are supported:

4x 3.5-inch hot-swap SAS/SATA drive bays 8x 2.5-inch hot-swap SAS/SATA drive bays 8x 2.5-inch hot-swap NVMe drive bays

The drive bays in the open position are shown in the following figure.

Note: The figure shows an M.2 Module installed in the 2.5-inch drive bays, however installing the M.2 Module in this location is currently not supported

Lenovo ThinkSystem SR655 Server 21

Figure 7. Mid-chassis drive bays

The backplanes used to provide these drive bays are listed in the following table.

Table 14. Backplanes for mid drive bays

Part number

Feature code Description

Maximum supported

Mid - 3.5-inch drive backplane

See note* AUW8 ThinkSystem 1U 3.5" SATA/SAS 4-Bay Backplane 1

Mid - 2.5-inch drive backplanes

See note* B5VP ThinkSystem SR655 2.5" SATA/SAS 4-Bay Backplane 2‡

See note* B5VN ThinkSystem SR635/SR655 2.5" NVMe 4-Bay Backplane 2‡

* Backplanes are available as part numbers for field upgrades using upgrade kits, as described in the Field

upgrades section below.

‡ 2.5-inch drive backplanes for the mid-chassis area must be installed in pairs. NVMe and SAS/SATA cannot be mixed.

The use of drive bays in the mid-chassis area has the following configuration rules:

Processors with TDP higher than 155W are not supported

Full-length adapter cards are not supported

GPUs (including low profile GPUs such as the T4) are not supported

If 2.5-inch mid-chassis drive bays are configured then rear drive bays are not supported. See the

Supported drive bay combinations section for more information.

The use of NVMe drives in the mid bays requires to use of a PCIe retimer or switch

Lenovo ThinkSystem SR655 Server 22

Rear drive bays

The SR655 supports hot-swap drives installed at the rear of the server chassis. Supported configurations are as follows:

4x 3.5-inch hot-swap SAS/SATA drive bays 4x 2.5-inch hot-swap SAS/SATA drive bays 4x 2.5-inch hot-swap NVMe drive bays

The configurations are shown in the following figure.

Figure 8. Rear drive bay configurations

The backplanes used to provide these drive bays are listed in the following table.

Table 15. Backplanes for rear drive bays

Part number

Feature code Description

Maximum supported

Rear - 3.5-inch drive backplane

See note* AUW8 ThinkSystem 1U 3.5" SATA/SAS 4-Bay Backplane 1

Rear - 2.5-inch drive backplanes

See note* B5VP ThinkSystem SR655 2.5" SATA/SAS 4-Bay Backplane 1

See note* B5VN ThinkSystem SR635/SR655 2.5" NVMe 4-Bay Backplane 1

* Backplanes are available as part numbers for field upgrades using upgrade kits, as described in the Field

upgrades section below.

The use of rear drive bays has the following configuration rules:

Slots 7 and 8 are not available

GPUs are not supported

If 3.5-inch rear drive bays are configured then only slots 3 and 6 are available, as described in the

I/O expansion section

The use of NVMe drives in rear bays requires to use of a PCIe retimer or switch

Lenovo ThinkSystem SR655 Server 23

Supported drive bay combinations

This section describes the various combinations of 3.5-inch and 2.5-inch drives that the server supports. The drive bay combinations are grouped based on the drive type at the front of the server, 3.5-inch or 2.5inch.

3.5-inch drive bay chassis

The following table shows the supported combinations when the server is configured with a 3.5-inch chassis (where the front drive bays are 3.5-inch). In this configuration:

When the front bays are 3.5-inch bays, the mid bays are also 3.5-inch bays, however the rear zone can be either 2.5-inch SAS/SATA or 3.5-inch SAS/SATA

NVMe is only supported in the front bays, using the AnyBay backplane (which offers 4x NVMecapable drive bays)

The choice of storage controller for each configuration is listed in the Adapter selections section.

Table 16. Drive bay combinations with 3.5-inch chassis (Blue cells = SAS/SATA, Purple cells = AnyBay)

Config

Total drives

Front bays (3.5") Mid bays (3.5") Rear bays (3.5" or 2.5")

SAS/SATA AnyBay SAS/SATA 3.5" SAS/SATA 2.5" SAS/SATA

3.5-inch chassis - SAS/SATA drives only

A 8 8 0 0 0 0

B 12 12 0 0 0 0

C 16 12 0 0 4 0

D 16 12 0 0 0 4

E 20 12 0 4 4 0

F 20 12 0 4 0 4

3.5-inch chassis - SAS/SATA and AnyBay drives

G 12 8 4 0 0 0

H 16 8 4 0 4 0

I 16 8 4 0 0 4

J 20 8 4 4 4 0

K 20 8 4 4 0 4

2.5-inch drive bay chassis

The server has 36 drive bays in total, however up to 32 drives are supported in a configuration.

The following table shows the supported combinations when the server is configured with a 2.5-inch chassis (where the front drive bays are 2.5-inch). In this configuration:

With the 2.5-inch chassis, all drive bays are 2.5-inch bays. No 3.5-inch drives are supported with the

2.5-inch chassis.

Mid bays and Rear bays cannot be used concurrently

The choice of storage controller for each configuration is listed in the Adapter selections section.

Lenovo ThinkSystem SR655 Server 24

Table 17. Drive bay combinations with 2.5-inch chassis (Blue cells = SAS/SATA, Red cells = NVMe)

Config

Total drives

Front bays (2.5") Mid bays (2.5") Rear bays (2.5")

SAS/SATA NVMe SAS/SATA NVMe SAS/SATA NVMe

2.5-inch chassis - SAS/SATA drives only

A 8 8 0 0 0 0 0

B 16 16 0 0 0 0 0

C 20 16 0 0 0 4 0

D 24 24 0 0 0 0 0

E 28 24 0 0 0 4 0

F 32 24 0 8 0 0 0

2.5-inch chassis - SAS/SATA and NVMe drives in the front bays

G 16 8 8 0 0 0 0

H 20 8 8 0 0 4 0

I 24 16 8 0 0 0 0

J 28 16 8 0 0 4 0

K 32 16 8 8 0 0 0

2.5-inch chassis - only NVMe drives in the front bays

L 8 0 8 0 0 0 0

M 16 0 16 0 0 0 0

N 20 0 16 0 0 4 0

O 20 0 16 0 0 0 4

P 24 0 24 0 0 0 0

Q 28 0 24 0 0 4 0

R 28 0 24 0 0 0 4

S 32 0 24 8 0 0 0

T 32 0 24 0 8 0 0

Adapter selections

The following tables lists the supported drive bay combinations plus the list of supported controller combinations supported by each of those drive bay combinations. Information about the controllers can be found in the Controllers for internal storage section.

General rules for adapters:

The RAID 730-8i 1G cannot be used for connection to the rear drive bays

Only the RAID 530-8i or the 430-8i HBA can be selected when a separate controller is needed for the rear drive bays

The RAID 730-8i 2G cannot be used in the same server as the RAID 730-8i-1G or RAID 930-8i

The M.2 Adapter is not supported in configurations of 16 or more 2.5-inch NVMe drives in the front bays

Lenovo ThinkSystem SR655 Server 25

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