Lenovo 7Y99A00LEA User Manual
Lenovo ThinkSystem SR635 Server
Product Guide
The Lenovo ThinkSystem SR635 is a 1-socket 1U 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 SR635 offers the ultimate in single-socket server performance in a space-saving 1U form factor. With
up to 128 PCIe lanes, the server is ideal for dense workloads that can take advantage of GPU processing
and high-performance NVMe drives.
Suggested uses: AI Inference, VDI, OLTP, Analytics, HPC, software-defined storage
Figure 1. Lenovo ThinkSystem SR635
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. In addition, The server offers
onboard NVMe PCIe ports that allow direct connections to 16x NVMe SSDs, which frees up I/O slots and
helps lower NVMe solution acquisition costs.
The SR635 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 SR635 Server 1
Key features
Combining performance and flexibility, the SR635 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 SR635 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 up to three single-width GPUs, each up to 75W. A 3:1 ratio of GPUs to CPUs means
substantial processing power is available with just one CPU.
Supports up to 16x 2.5-inch hot-swap drive bays, by using combinations of front-accessible (up to
10 bays), mid-accessible (4 bays), and rear-accessible (2 bays).
Supports four 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 NVMe drives without oversubscription of PCIe lanes (1:1 connectivity) and without the
need for additional NVMe adapters. The use of NVMe drives maximizes drive I/O performance, in
terms of throughput, bandwidth, and latency.
Supports 12x SATA drives using the onboard SATA controller (no additional adapter needed),
enabling lower cost, high capacity storage solution for cold storage workloads.
Supports 12x SAS drives using a variety of support RAID controllers or SAS HBAs.
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 16 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 four PCIe 4.0 slots (3 with rear access, 1 internal for a RAID adapter) plus a slot
dedicated to the OCP adapter.
Lenovo ThinkSystem SR635 Server 2
Availability and serviceability
The SR635 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 seven 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 SR635:
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 SR635 Server 3
Industry-standard Advanced Encryption Standard (AES) NI support for faster, stronger encryption.
Energy efficiency
The SR635 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 advanced data center power notification and
analysis to help achieve lower heat output and reduced cooling needs.
Lenovo ThinkSystem SR635 Server 4
Components and connectors
The following figure shows the front of the server.
Figure 2. Front view of the Lenovo ThinkSystem SR635
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 SR635
Lenovo ThinkSystem SR635 Server 5
The following figure shows the locations of key components inside the server.
Figure 4. Internal view of the Lenovo ThinkSystem SR635
Lenovo ThinkSystem SR635 Server 6
System architecture
The following figure shows the architectural block diagram of the SR635, showing the major components
and their connections.
Figure 5. SR635 system architectural block diagram
Standard specifications
The following table lists the standard specifications.
Table 1. Standard specifications
Components Specification
Machine
types
7Y98 - 1 year warranty
7Y99 - 3 year warranty
Form factor 1U 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.
Memory
protection
ECC, SDDC, Patrol/Demand Scrubbing, DRAM Address Command Parity with Replay, DRAM
Uncorrected ECC Error Retry, Post Package Repair
Lenovo ThinkSystem SR635 Server 7
Disk drive
bays
Up to 4x 3.5-inch or 16x 2.5-inch hot-swap drive bays:
Front bays can be one of the following:
4x 3.5-inch hot-swap SAS/SATA
8x 2.5-inch hot-swap SAS/SATA
6x 2.5-inch hot-swap SAS/SATA + 4x 2.5-inch hot-swap AnyBay
10x 2.5-inch hot-swap AnyBay
Mid (internal): 4x 2.5-inch hot-swap NVMe bays
Rear can be one of the following:
2x 2.5-inch hot-swap SAS/SATA bays
2x 2.5-inch hot-swap NVMe bays
See Supported drive bay combinations for details. AnyBay bays support SAS, SATA or NVMe
drives. NVMe bays only support NVMe drives. Both mid and rear drive bays can be used in
conjunction with 2.5-inch front drive bays. Mid bays are hot-swap drive bays and are accessible by
removing the top cover of the server. The server supports up to 16x NVMe drives (10 front, 4 mid,
2 rear) all with direct connections (no oversubscription).
Maximum
internal
storage
All NVMe: 87.04 TB using 10x 6.4 TB NVMe (front) + 6x 3.84TB NVMe SSDs (4x mid, 2x
rear)
All SSDs: 107.52 TB using 12x 7.68TB SSDs (10x front, 2x rear) + 4x 3.84TB NVMe (mid)
All HDDs in front (with NVMe): 55.36 TB using 4x 10TB 3.5-inch HDDs (front) + 4x 3.84TB
NVMe SSDs (mid)
Mix of SSDs/HDDs supported but not in the same array
Storage
controller
Onboard SATA supporting up to 12 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 with 4GB 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.
PCI
Expansion
slots
A total of up to 4 PCIe 4.0 slots (3 with rear access, 1 internal for a RAID adapter) plus a slot
dedicated to the OCP adapter. Slot availability is based on riser selection.
Three choices for rear-access slots:
3x PCIe 4.0 x16 low-profile slots
1x PCIe 4.0 x16 full-height half-length slot + 1x PCIe 4.0 x16 low-profile slot
1x PCIe 4.0 x16 low-profile slot (supports 2x rear 2.5-inch drive bays)
Optionally, an additional internal PCIe 4.0 x8 low-profile slot for al internal drive controller.
Components Specification
Lenovo ThinkSystem SR635 Server 8
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 Six or seven N+1 redundant hot swap 40 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).
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: 43 mm (1.3 in.), width: 434 mm (17.1 in.), depth: 778 mm (30.6 in.)
Weight Maximum: 19.2 kg (42.3 lb)
Components Specification
Lenovo ThinkSystem SR635 Server 9
Models
Models of the SR635 are defined based on whether the server has 2.5-inch drive bays at the front (called
the 10x 2.5" chassis or simply the 2.5-inch chassis) or whether it has 3.5-inch drive bays at the front (called
the 4x 3.5" chassis or simply the 3.5-inch 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
B5VL ThinkSystem SR635 10x2.5" Chassis
B5VM ThinkSystem SR635 4x3.5" Chassis
The following tables list the available models, grouped by region.
Models for Australia and New Zealand
Models for South East Asian countries (ASEAN)
Models for Brazil
Models for EMEA countries
Models for Hong Kong, Taiwan, Korea (HTK)
Models for India
Models for Japan
Models for Latin American countries (except Brazil)
Models for USA and Canada
Refer to the Specifications section for information about standard features of the server.
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 7Y99)
7Y99A00XAU 7302P 16C
155W 3.0GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
2x 750W Yes Yes 6x
Std
Fric
7Y99A014AU 7402P 24C
180W 2.8GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
2x 750W Yes Yes 6x
Perf
Fric
7Y99A00UAU 7502P 32C
180W 2.5GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
2x 750W Yes Yes 6x
Perf
Fric
7Y99A00WAU 7702P 64C
200W 2.0GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
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) where x = rear-accessible slots, y = internal slot)
Lenovo ThinkSystem SR635 Server 10
Models for South East Asian countries (ASEAN)
Table 4. Models for South East Asian countries (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 7Y99)
7Y99A00VSG 7302P 16C
155W 3.0GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
2x 750W Yes Yes 6x
Std
Fric
7Y99A00QSG 7402P 24C
180W 2.8GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
2x 750W Yes Yes 6x
Perf
Fric
7Y99A00YSG 7502P 32C
180W 2.5GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
2x 750W Yes Yes 6x
Perf
Fric
7Y99A00RSG 7702P 64C
200W 2.0GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
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) where x = rear-accessible slots, y = internal slot)
Models for Brazil
Table 5. Models for Brazil
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 7Y99)
7Y99A01GBR 7262 8C 155W
3.2GHz
1x 16GB
2933
530-8i 8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 0
1x 750W Yes Yes 6x
Std
Slide
7Y99A01HBR 7302P 16C
155W 3.0GHz
1x 16GB
2933
530-8i 8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 0
1x 750W Yes Yes 6x
Std
Slide
7Y99A01JBR 7302P 16C
155W 3.0GHz
1x 32GB
2933
730-8i
1GB
8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 0
1x 750W Yes Yes 6x
Std
Slide
7Y99A01FBR 7402P 24C
180W 2.8GHz
1x 32GB
2933
730-8i
1GB
8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 01x1100W
Yes Yes 6x
Perf
Slide
† Processor description: AMD EPYC model, number of cores, thermal design power (TDP), core frequency
* Slots are listed as (x / y) where x = rear-accessible slots, y = internal slot)
Lenovo ThinkSystem SR635 Server 11
Models for EMEA countries
Table 6. Models for EMEA countries
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 7Y99)
7Y99A00KEA 7262 8C
155W
3.2GHz
1x 32GB
3200
Onboard
AHCI
10x 2.5"
(6xSAS + 4xAny)
Open bay
Open Open 1x 750W Yes Yes 6x
Std
Slide
7Y99A00LEA 7302P 16C
155W
3.0GHz
1x 32GB
3200
Onboard
AHCI
10x 2.5"
(6xSAS + 4xAny)
Open bay
Open Open 1x 750W Yes Yes 6x
Std
Slide
7Y99A00NEA 7302P 16C
155W
3.0GHz
1x 32GB
3200
Onboard
AHCI
4x 3.5" SAS
Open bay
Open Open 1x 750W Yes Yes 6x
Std
Slide
7Y99A00JEA 7502P 32C
180W
2.5GHz
1x 32GB
3200
Onboard
AHCI
10x 2.5"
(6xSAS + 4xAny)
Open bay
Open Open 1x 750W Yes Yes 6x
Perf
Slide
7Y99A00HEA 7702P 64C
200W
2.0GHz
1x 32GB
3200
Onboard
AHCI
10x 2.5"
(6xSAS + 4xAny)
Open bay
Open Open 1x 750W Yes Yes 6x
Perf
Slide
7Y99A00MEA 7742 64C
225W
2.25GHz
1x 32GB
3200
Onboard
AHCI
10x 2.5"
(6xSAS + 4xAny)
Open bay
Open Open 1x
1100W
Yes Yes 6x
Perf
Slide
† Processor description: AMD EPYC model, number of cores, thermal design power (TDP), core frequency
* Slots are listed as (x / y) where x = rear-accessible slots, y = internal slot)
Models for Hong Kong, Taiwan, Korea (HTK)
Table 7. 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 7Y99)
7Y99A00ZCN 7302P 16C
155W 3.0GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x FHHL
x16 / 0
2x 750W Yes Yes 6x
Std
Fric
7Y99A010CN 7402P 24C
180W 2.8GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x FHHL
x16 / 0
2x 750W Yes Yes 6x
Perf
Fric
7Y99A012CN 7502P 32C
180W 2.5GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x FHHL
x16 / 0
2x 750W Yes Yes 6x
Perf
Fric
7Y99A013CN 7702P 64C
200W 2.0GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x FHHL
x16 / 0
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) where x = rear-accessible slots, y = internal slot)
Lenovo ThinkSystem SR635 Server 12
Models for India
Table 8. 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 7Y99)
7Y99A011SG 7302P 16C
155W 3.0GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x FHHL
x16 / 0
2x 750W Yes Yes 6x
Std
Fric
7Y99A00SSG 7402P 24C
180W 2.8GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x FHHL
x16 / 0
2x 750W Yes Yes 6x
Perf
Fric
7Y99A00PSG 7502P 32C
180W 2.5GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x FHHL
x16 / 0
2x 750W Yes Yes 6x
Perf
Fric
7Y99A00TSG 7702P 64C
200W 2.0GHz
1x 32GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x FHHL
x16 / 0
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) where x = rear-accessible slots, y = internal slot)
Models for Japan
Table 9. 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 7Y99)
7Y99A01BJP 7262 8C
155W 3.2GHz
1x 16GB
3200
530-8i 8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
1x 750W Opt Yes 6x
Std
Slide
7Y99A015JP 7302P 16C
155W 3.0GHz
1x 16GB
3200
530-8i 8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
1x 750W Opt Yes 6x
Std
Slide
7Y99A019JP 7502P 32C
180W 2.5GHz
1x 16GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
1x 750W Opt Yes 6x
Perf
Slide
7Y99A01DJP 7702P 64C
200W 2.0GHz
1x 16GB
3200
730-8i
2GB
8x 2.5" SAS
Open bay
4x1Gb 1x
FHHL
x16 / 0
1x 750W Opt Yes 6x
Perf
Slide
† Processor description: AMD EPYC model, number of cores, thermal design power (TDP), core frequency
* Slots are listed as (x / y) where x = rear-accessible slots, y = internal slot)
Lenovo ThinkSystem SR635 Server 13
Models for Latin American countries (except Brazil)
Table 10. Models with a 3-year warranty for Latin American countries (except Brazil)
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 7Y99)
7Y991000LA 7262 8C 155W
3.2GHz
1x 16GB
3200
530-8i 8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 0
1x 750W Yes Yes 6x
Std
Slide
7Y99A01MLA 7262 8C 155W
3.2GHz
1x 16GB
2933
530-8i 8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 0
1x 750W Yes Yes 6x
Std
Slide
7Y991001LA 7302P 16C
155W 3.0GHz
1x 32GB
3200
530-8i 8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 0
1x 750W Yes Yes 6x
Std
Slide
7Y99A01NLA 7302P 16C
155W 3.0GHz
1x 16GB
2933
530-8i 8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 0
1x 750W Yes Yes 6x
Std
Slide
7Y99A01PLA 7302P 16C
155W 3.0GHz
1x 32GB
2933
730-8i
1GB
8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 0
1x 750W Yes Yes 6x
Std
Slide
7Y99A01QLA 7402P 24C
180W 2.8GHz
1x 32GB
2933
730-8i
1GB
8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 01x1100W
Yes Yes 6x
Perf
Slide
7Y99A01RLA 7502P 32C
180W 2.5GHz
1x 32GB
2933
930-8i 8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 01x1100W
Yes Yes 6x
Perf
Slide
7Y99A01SLA 7702P 64C
200W 2.0GHz
1x 64GB
2933
930-8i 8x 2.5" SAS
Open bay
4x1Gb 3x LP
x16 / 01x1100W
Yes Yes 6x
Perf
Slide
† Processor description: AMD EPYC model, number of cores, thermal design power (TDP), core frequency
* Slots are listed as (x / y) where x = rear-accessible slots, y = internal slot)
Models for USA and Canada
Table 11. 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 7Y99)
7Y99A017NA 7502P 32C
180W 2.5GHz
1x 32GB
3200
Option Optional 2.5"
Open bay
Open Open 1x
1100W
Yes Yes 6x
Perf
Slide
7Y99A018NA 7702P 64C
200W 2.0GHz
1x 32GB
3200
Option Optional 2.5"
Open bay
Open Open 1x
1100W
Yes Yes 6x
Perf
Slide
TopSeller models with a 3-year model (machine type 7Y99)
7Y99A01ANA 7302P 16C
155W 3.0GHz
1x 16GB
3200
Option Optional 2.5"
Open bay
Open Open 1x 750W Yes Yes 6x
Std
Slide
7Y99A016NA 7402P 24C
180W 2.8GHz
1x 32GB
3200
Option Optional 2.5"
Open bay
Open Open 1x
1100W
Yes Yes 6x
Perf
Slide
† Processor description: AMD EPYC model, number of cores, thermal design power (TDP), core frequency
* Slots are listed as (x / y) where x = rear-accessible slots, y = internal slot)
Processor options
The SR635 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
Lenovo ThinkSystem SR635 Server 14
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 12. Processor options for the SR635
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.
Table 13. 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
Lenovo ThinkSystem SR635 Server 15
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.
Table 14. 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 across
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.
Lenovo ThinkSystem SR635 Server 16
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
Internal storage
The SR635 supports 4x 3.5-inch or 16x 2.5-inch drive bays or a combination of drive bays, depending on
the selected chassis and backplane configuration. 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 bay zones are as follows:
Front: 4x 3.5-inch hot-swap bays or up to 10x 2.5-inch hot-swap bays
Mid (internal): 4x 2.5-inch hot-swap bays
Rear: up to 2x 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 SR635 supports NVMe drives to maximize storage performance. The server supports up to 16 NVMe
drives without oversubscription (that is, each x4 drive has a full x4 connection (4 lanes) to the processor):
10x NVMe drives in the front bays
4x NVMe drives in the mid bays
2x NVMe drives in the rear bays
Lenovo ThinkSystem SR635 Server 17
The specifics of these configurations plus other NVMe-rich configurations are covered in the Supported
drive bay combinations and Adapters selections sections.
The 10x NVMe drives at the front makes use of the 10-bay AnyBay backplane (feature B5VS) which
requires SAS/SATA cabling and controllers as well as the NVMe cabling. However, if 16x NVMe drive bays
are configured (ie all drive bays in the server populated with NVMe drives), then the server can be
configured in the DCSC configurator without SAS/SATA cabling and controllers. Note that all 16x NVMe
drive bays must be configured (using backplanes B5VS, B5VN and B5VQ); configurations of 10 or 12 or 14x
NVMe drive bays will require SAS/SATA cabling and controllers.
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.
Front drive bays
The front drive bay zone supports the following configurations:
3.5-inch drive bays
No backplane and no drives (supports field upgrades)
4x 3.5-inch SAS/SATA
2.5-inch drive bays
No backplane and no drives (supports field upgrades)
8x 2.5-inch hot-swap SAS/SATA
6x 2.5-inch hot-swap SAS/SATA + 4x 2.5-inch hot-swap AnyBay
10x 2.5-inch hot-swap AnyBay
These configurations are shown in the following figure.
Lenovo ThinkSystem SR635 Server 18
Figure 6. SR635 front drive bay configurations
The backplanes used to provide these drive bays are listed in the following table.
10x NVMe drive support: The server supports 10x 2.5-inch NVMe-only drive bays in the front of the
server. Such support makes use of the 10-bay AnyBay backplane (feature B5VS), however the
SAS/SATA connectors on the backplane are not connected, and no SAS/SATA cabling or controllers
are configured.
Table 15. Backplanes for front drive bays
Part
number
Feature
code Description
Maximum
supported
Front 3.5-inch drive backplanes
See note* AUW8 ThinkSystem 1U 3.5" SATA/SAS 4-Bay Backplane
(4x 3.5-inch SAS/SATA backplane)
1
Front 2.5-inch drive backplanes
See note* B7K3 ThinkSystem SR635 2.5" SATA/SAS 8-Bay Backplane
(8x 2.5-inch SAS/SATA backplane)
1
See note* AUW9 ThinkSystem 1U 2.5" 4 AnyBay 10-Bay Backplane
(10-bay 2.5-inch backplane with 6x SAS/SATA + 4x AnyBay bays†)
1
See note* B5VS ThinkSystem 1U 10x2.5" PCIe Gen4 AnyBay Backplane
(10-bay 2.5-inch backplane with 10x AnyBay bays†)
1
Lenovo ThinkSystem SR635 Server 19
* 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; can also be configured as 10x NVMe drives without
SAS/SATA cabling.
Mid drive bays
The SR635 optionally supports 4x 2.5-inch hot-swap NVMe drive bays 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 into an angled open position.
The drive bays, angled up, are shown in the following figure.
Figure 7. Mid-chassis drive bays (open position)
The backplanes used to provide these drive bays are listed in the following table.
Table 16. Backplanes for mid drive bays
Part
number
Feature
code Description
Maximum
supported
Mid - 2.5-inch drive backplanes
See note* B5VN ThinkSystem SR635/SR655 2.5" NVMe 4-Bay Backplane
(4x 2.5-inch NVMe 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 drive bays in the mid-chassis area has the following configuration rules:
Only NVMe drives are supported in the mid chassis area. SAS and SATA drives are not supported.
The mid drive cage is only supported in conjunction with the 10x 2.5-inch AnyBay backplane
(feature AUW9) or the 4x 3.5-inch SAS/SATA backplane (feature AUW8) for the front drives. The use
of other front-drive backplanes with the mid cage is not supported.
The mid drive cage occupies the same physical space as the M.2 module, internal PCIe slot (slot 4)
and two of the three holders for RAID power module (supercaps). As a result, the M.2 module, slot 4
Lenovo ThinkSystem SR635 Server 20
and two supercaps cannot be installed.
Rear drive bays
The SR635 supports hot-swap drives installed at the rear of the server chassis. Supported configurations
are as follows:
2x 2.5-inch hot-swap SAS/SATA drive bays
2x 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 17. Backplanes for rear drive bays
Part
number
Feature
code Description
Maximum
supported
Rear - 2.5-inch drive backplanes
See note* B5VR ThinkSystem SR635 2.5" SATA/SAS 2-Bay Rear Backplane
(2x 2.5-inch SAS/SATA backplane)
1
See note* B5VQ ThinkSystem SR635 2.5" NVMe Gen4 2-Bay Rear BP
(2x 2.5-inch NVMe 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 2 and 3 are not available
Slot 1 is a low-profile slot
GPUs are not supported
Lenovo ThinkSystem SR635 Server 21
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). The choice of storage controller for each configuration is
listed in the Adapter selections section.
Table 18. Drive bay combinations with 3.5-inch chassis (Blue cells = SAS/SATA, Red cells = NVMe)
Config
Total
drives
Front bays (3.5") Mid bays (2.5") Rear bays (2.5")
SAS/SATA NVMe SAS/SATA NVMe
A 4 4 0 0 0
B 6 4 0 2 0
C 6 4 0 0 2
D 8 4 4 0 0
2.5-inch drive bay chassis
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). The choice of storage controller for each configuration is
listed in the Adapter selections section.
Table 19. Drive bay combinations with 2.5-inch chassis (Blue cells = SAS/SATA, Red cells = NVMe, Purple
cells = AnyBay)
Config
Total
drives
Front bays (2.5")
Mid bays
(2.5") Rear bays (2.5")
SAS/SATA AnyBay NVMe NVMe SAS/SATA NVMe
2.5-inch chassis - only SAS/SATA drives in the front bays
A 8 8 0 0 0 0 0
B 10 8 0 0 0 2 0
C 10 8 0 0 0 0 2
2.5-inch chassis - mix of SAS/SATA-only bays and AnyBay bays in the front
D 10 6 4 0 0 0 0
E 12 6 4 0 0 2 0
F 12 6 4 0 0 0 2
2.5-inch chassis - all AnyBay bays in the front
G 10 0 10 0 0 0 0
H 12 0 10 0 0 2 0
I 12 0 10 0 0 0 2
J 14 0 10 0 4 0 0
K 16 0 10 0 4 2 0
L 16 0 10 0 4 0 2
M 16 0 0 10 4 0 2
Lenovo ThinkSystem SR635 Server 22
Loading...