Lenovo Dense Servers

dense server systems

Lenovo delivers affordable solutions in this era of the “software-defined” data center, where customers are
looking for platforms with greater density and easier scalability.



ThinkServer sd350

ThinkServer sd350

Ultra-dense 2U four-node platform for distributed enterprise and hyperconverged workloads

Optimized for distributed enterprise, hyperconverged and infrastructure solutions, the sd350, using today’s fastest Intel processors, offers the optimal amount of memory and storage to deliver high performance and scalability at a low cost..

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Key Specifications

Intel® Xeon® E5-2600 v4 processor

Up to 512GB Memory

Up to 50MB L3 Cache

3PCIe 3.0 Expansion Slots

Up to 10GbE NIC

Lenovo XClarity Administrator

Balanced Performance

Incorporating the latest technologies, the sd350 offers the new Intel® Xeon® E5-2600 processors v4 series (up to 135W, 20 cores), up to 512GB RDIMM memory, and a choice of solid state drives (SSDs) and 15,000rpm hard disk drives, for blazingly fast performance.

Fast processing demands fast I/O, so the sd350 also provides three PCIe 3.0 adapter slots, two USB 3.0 ports, and support for 10 Gigabit Ethernet (GbE). One dual-port 10GbE controller per server equals 80Gbps total throughput per 2U of rack space. Fourteen Data Rate (FDR) 40Gb InfiniBand (ConnectX-3) is also supported.


The sd350 provides the flexibility to use your preferred operating systems and hypervisors, including multiple versions of Windows 2012 (including Hyper-V), SUSE Linux Enterprise Server, Red Hat Enterprise Linux and VMware.

ThinkServer n400 Enclosure

Lenovo n400 Enclosure

Slim enclosure for hot-pluggable sd350 servers

This dense offering fits four hot-pluggable sd350 servers into an n400 enclosure that takes up only 2U (0.5U per server) and includes room for plenty of internal storage.

Top Resources

n400 3D Tour >

n400 Datasheet >

n400 Product Guide >

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Key Specifications

2U Form Factor

Fits up to 4 sd350 servers

Up to 48TB Storage

5 redundant/non-hot-swap fans

Hot-swap sd350 servers

Hot-swap power supplies

Storage Optimization

The n400 enclosure supports up to 24 2.5-inch HDDs or SSDs (6 drives per sd350), which you can mix as needed. There is plenty of flexibility in HDD performance and capacity per n400 enclosure with up to 48TB of internal near-line 7,200rpm SATA, 24TB of 7,200rpm SAS, 28.8TB of 10,000rpm SAS, or 14.4TB of 15,000rpm SAS HDDs.

With support for up to 11.5TB of enterprise standard SATA SSDs, or 9.6TB of enterprise SAS SSDs as well, storage flexibility and performance skyrockets. Standard software RAID 0/1/10/5, and optional hardware RAID 0/1/10 support increases the reliability/availability of your storage.


The overall design makes the sd350 and n400 solution extremely affordable, with a low total cost of ownership (TCO). Four servers in only 2U provide the density and ease of servicing of blade servers, but at a much lower cost because it fits right into an existing rack, unlike blade servers which require a chassis. Also, you can use standard networking architecture such as Lenovo RackSwitches.

Back of the ThinkServer n400 Enclosure

Authorized Lenovo Distributors


Please contact your preferred Authorized Lenovo Distributor to order.

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