Home › Servers › Lenovo

Lenovo ThinkSystem SD650

End of saleServersdense node
Lenovo ThinkSystem SD650dense node2 × SFF 2.5" bays

The Lenovo ThinkSystem SD650 is a direct water-cooled dual-socket compute tray designed for extreme HPC clusters and supercomputers. Operating within the NeXtScale D2 or n1200 enclosures, it dissipates up to 90% of heat directly through warm water cooling loops, eliminating noisy server fans and reducing data center cooling energy costs.

Buy Lenovo ThinkSystem SD650Sell yours

Specifications

BrandLenovo
FamilyThinkSystem SD
Form factordense node
ReleasedJun 2018
End of saleDec 2022
End of supportDec 2027
ProcessorUp to 2x 1st or 2nd Gen Intel Xeon Scalable processors up to 28 cores each (up to 205W TDP)
Memory16x DDR4 DIMM slots supporting up to 1TB DDR4-2933 ECC RDIMM
Drive baysUp to 2x 2.5-inch non-hot-swap SATA/NVMe SSDs or 2x internal M.2 boot SSDs
Expansion slots1x PCIe 3.0 x16 slot for high-speed fabric adapter (InfiniBand EDR / Omni-Path)
NetworkIntegrated Intel or Mellanox mezzanine adapter supporting 100Gb/s fabrics
Power supplyShared power delivered through the water-cooled enclosure backplane
ManagementLenovo XClarity Controller (XCC)

Generations

Compatible parts

Memory

Works together

How the Lenovo ThinkSystem SD650 connects to servers, storage and the network: 4 ways, with the parts and products on each path.

Fibre Channel SANiSCSI and NVMe/TCP over EthernetDirect-attached SASFile storage (NFS and SMB)

Fibre Channel SAN

Match the speed: 16Gb and 32Gb FC HBAs, switches and array ports work together, and each generation also runs one or two speeds below its own (a 32Gb port runs at 16Gb and 8Gb).

Adapters for the server (check the fit list)

Switches

Storage

Optics

Fibre Channel SAN: how it fits together

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Adapters for the server (check the fit list)

Switches

Storage

Optics

iSCSI and NVMe/TCP over Ethernet: how it fits together

Direct-attached SAS

12Gb SAS uses Mini-SAS HD (SFF-8644) connectors; older 6Gb gear uses Mini-SAS (SFF-8088). Adapter cables exist, but the link runs at the slower speed.

Adapters for the server (check the fit list)

Storage

Direct-attached SAS: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Adapters for the server (check the fit list)

Switches

Storage

Optics

File storage (NFS and SMB): how it fits together

Plan and size it

Check compatibility with Lenovo

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Lenovo has tested with the Lenovo ThinkSystem SD650.

Equivalent models from other brands

FAQ

What water supply temperature does the SD650 support?

It supports inlet water temperatures up to 50°C (122°F), allowing year-round free-cooling without mechanical chillers.

Does the SD650 compute tray have internal fans?

No, it is fanless; processors, memory, and voltage regulators are directly cooled by copper water loops.

Buying or selling ThinkSystem SD650?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

Buy ThinkSystem SD650Sell yours

Sources