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With up to 64 cores per processor and support for the new PCIe 4. This product guide provides essential pre-sales information to understand the ThinkSystem SR server, its key features and specifications, components and options, and configuration guidelines. This guide is intended for technical specialists, sales specialists, sales engineers, IT architects, and other IT professionals who want to learn more about the SR and consider its use in IT solutions.

In China? View this video on Youku. Figure 1. Lenovo ThinkSystem SR The SR server is a very configuration-rich offering, supporting 28 different drive bay configurations in the front, middle and rear of the server and 5 different slot configurations at the rear of the server. This level of flexibility ensures that you can configure the server exactly the way your workload requires.

Competitive servers that are based on the older EPYC “Naples” designs may not be able to offer these performance features. Combining performance and flexibility, the SR 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. The SR offers the following energy-efficiency features to save energy, reduce operational costs, and increase energy availability:. Figure 2. The following figure shows the components visible from the rear of the server.

The figure shows one configuration, with eight PCIe slots, however there are additional rear configurations which include 3. Figure 3. Figure 4. The following figure shows the architectural block diagram of the SR, showing the major components and their connections.

Figure 5. SR system architectural block diagram. See Supported drive bay combinations for details. Up to 8x PCIe 4. Slot availability is based on riser selection and rear drive bay selection. Slots require two processors. Slots are configured using three riser cards.

Riser 1 slots and Riser 2 slots are installed in slots in the system board, Riser 3 slots is cabled to ports on the system board. A variety of riser cards are available. For 2. Front: 1x USB 3. Rear: 3x USB 3. Configure-to-order CTO models are used to create models with factory-integrated server customizations. Preconfigured server models may also be available for the SR, however these are region-specific; that is, each region may define their own server models, and not all server models are available in every region.

Models of the SR are defined based on whether the server has 2. For models, the feature codes for these chassis bases are as listed in the following table. There are two system boards for the SR, which will be derived by the configurator based on the selection of processor and whether the configuration includes the NVIDIA A The server supports one or two processors.

There are no restrictions in the configuration of the servers based on the TDP thermal value of the processor. The appropriate heatsink will be automatically selected based on the processor and configuration of the server.

Certain ambient temperature requirements may apply. See the Operating environment section for details. In the SR, processors either have a standard 1U heatsink, standard 2U heatsink, or a performance heatsink attached depending on the TDP of the processor and configuration of the server. Performance heatsinks include a large 2U-high copper radiator that connects to the main heatsink via heat pipes. Figure 6. Performance heatsink.

Please contact your Lenovo sales representative for more information. The SR can be used with only one processor installed. Most core functions of the server including the XClarity Controller are connected to processor 1 as shown in the System architecture section. Drive support and controller support is as listed in the Controller selections section – see the rows for 1 processor installed in the tables.

Drives in the mid-chassis drive bays 2. The server supports memory speeds up to MHz, based on the memory type and the number of DIMMs installed per channel, as listed in the following table. 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.

The SR has three drive bay zones and supports up to 20x 3. 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 server also supports one or two M. See the System architecture section. The specifics of these configurations are covered in the Supported drive bay combinations and Controller selections sections.

The tables in those sections indicate the number of NVMe drives in each configuration plus the subscription ratio. The subscription ratio is the number of PCIe lanes from the processor compared to the number of lanes to the drives. A ratio of means all drives get the full number of lanes they need to maximize drive performance currently 4 lanes per drive.

A ratio of means each drive only gets the half the bandwidth from the processor. See the 7mm drives section for details. This feature enables the use of NVMe U. Tri-Mode is supported with U. Tri-Mode requires U. See the Internal drive options section for the U.

These configurations are shown in the following figure. The feature codes listed are the backplane feature codes when ordering CTO and correspond to the feature codes listed in the table below the figure. Tip : Configurations with 8x or 16x total drive bays can be configured with or without an Integrated Diagnostics Panel with pull-out LCD display. With the Integrated Diagnostics Display, 8-bay configurations can be upgrade to 16 bays, however bay configurations cannot be upgrade to 24 bays.

See the Local management section for details. Figure 7. SR front drive bay configurations. Field upgrades : All front backplanes are available as part numbers for field upgrades along with require cable option kits, as described in the Field upgrades section below. Common backplanes : Two of the 2. Both feature codes use backplane SBB7A The SR 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 up at the front. Figure 8. Mid-chassis drive bays. Field upgrades : Backplanes are available as part numbers for field upgrades along with require cable option kits, as described in the Field upgrades section below. The SR supports hot-swap drives installed at the rear of the server chassis. Supported configurations are as follows:. Figure 9.

Rear 2. In addition, the server supports two 7mm-thickness SSDs which are installed in place of either slot 3 or slot 6 not both. Supported 7mm drive bays are:. These drives are shown in the following figure. See the 7mm drives section for more information. Tips : These 7mm drives can be used in conjunction with any rear drive 2. Figure Rear 7mm drive bay configurations. This section describes the various combinations of 3.

The drive bay combinations are grouped based on the drive type at the front of the server, 3. The following table shows the supported combinations when the server is configured with a 3. The table lists the front, middle and rear backplanes required for each drive bay combination.