Lenovo Flex System x280 X6 Compute Node Installation And Service Manual page 732

Types 7903 and 4259

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The compute node has a total of 48 dual inline memory module (DIMM)

connectors. The compute node supports low-profile (LP) DDR3 DIMMs with

error-correcting code (ECC) in 4 GB, 8 GB, 16 GB, 32 GB, and 64 GB capacities.

The following illustration shows the system-board components, including the

DIMM connectors.

The DDR-3 DIMMs are accessed internally through the integrated memory

controllers on the microprocessors. Each microprocessor controls 24 DIMMs. Eight

scalable memory buffers provide the interface between the microprocessor memory

controller and the DIMMs. The scalable memory controllers interface using one

scalable memory interconnect 2 (SMI2) channel. Each SMI2 channel supports two

DDR-3 memory buses and each DDR-3 bus connects to up to three DIMMs.

Flex System x280 X6, x480 X6, and x880 X6 Compute Node Types 7903 and 4259: Installation and Service Guide

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