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Best Practices

Intel® Xeon® Scalable Platform (Purley)
The Intel® Scalable Platform (Purley) features a new server microarchitecture that supports the next generation of DDR4 server memory. The Purley platform significantly increases memory bandwidth performance by incorporating an additional two memory channels over the previous quad-channel Grantley platform. With a total of six memory channels available to the processor, and an increase in memory speed, memory-bound applications will experience a dramatic boost in performance.

Memory image

Targeted Uses
The higher core counts and increased memory bandwidth, combined with higher density support for greater total memory capacity, make the Purley platform ideal for the following applications:
  • High-Performance Computing (HPC)

  • Artificial Intelligence (AI)

  • Virtualisation

  • Cloud

  • Big Data

  • In-Memory Database

  • Unified Networking

  • Business Intelligence

  • Virtual Desktop Infrastructure

  • Analytics

At a Glance
Xeon SP (Skylake)
  • Supports up to 1.5TB (terabytes) of memory per processor*

  • Supports DDR4 Registered and Load Reduced DIMMs up to 2666MT/s, equivalent to transfer rates of 21.3GB/s per module

Memory Architecture
Memory architecture is based on six channels arranged in two banks per processor. Each processor can be configured with 6 or 12 modules, depending on the motherboard layout, to achieve the maximum aggregated memory bandwidth.
  • 6 memory channels per processor

  • Up to 2 DIMMs per channel

  • Up to 12 DIMMs per processor

Memory Architecture

Xeon SP (Skylake)
  • DDR4-2666

  • Registered DIMM (RDIMM, 3DS RDIMM)

  • Load Reduced DIMM (LRDIMM, 3DS LRDIMM)

Model Type
(No Mixing in a Server)
DIMM Per Channel
DIMMs Per Channel
Registered DIMM (RDIMM, 3DS)
Load Reduced DIMM (LRDIMM, 3DS)

*Xeon Platinum 8180, 8176, 8170, 8160 or Gold 6142, 6140, 6134 required to achieve 1.5TB per processor. All other Xeon models limited to 768GB per processor.
Supported memory types and operating speeds will vary by server platforms and processor model used.
Memory types (Registered DIMMs, Load Reduced DIMMs) cannot be mixed within the same server.

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