Intel 1st/2nd-Generation Xeon Scalable Processor Platform “Purley”

The Intel® “Purley” Platform supports both 1st and 2nd-Gen Xeon Scalable Processors. This platform significantly increases memory bandwidth performance by incorporating an additional two memory channels over the previous quad-channel “Grantley” platform, with speeds of up to 2933MT/s. With a total of six memory channels available to the processor and an increase in memory speed, memory-bound applications experience a dramatic boost in performance.

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:

Server memory
  • 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 1st Generation (Skylake)

  • Supports up to 1.5TB (terabytes) of memory per processor1
  • Supports DDR4 Registered and Load Reduced DIMMs up to 2666MT/s, equivalent to transfer rates of 21.3GB/s per module

Xeon SP 2nd Generation (Cascade Lake)

  • Supports up to 4.5TB (terabytes) of memory per processor2
  • Supports DDR4 Registered and Load Reduced DIMMs up to 2933MT/s, equivalent to transfer rates of 23.4GB/s per module

Memory architecture

a diagram of 6 memory channels on either side of the CPU

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

Intel population rules

(6 Channel, 12 sockets per CPU, 2 DPC)

 
Intel Xeon SP Gen 1 – SKYLAKE - 1 DPC
Intel Xeon SP Gen 1 – SKYLAKE - 2 DPC
Intel Xeon SP Gen 2 – CASCADE LAKE - 1 DPC
Intel Xeon SP Gen 2 – CASCADE LAKE - 2 DPC
 
Intel Xeon SP Gen 1 – SKYLAKE - 1 DPC
Intel Xeon SP Gen 1 – SKYLAKE - 2 DPC
Intel Xeon SP Gen 2 – CASCADE LAKE - 1 DPC
Intel Xeon SP Gen 2 – CASCADE LAKE - 2 DPC
Module Type (No Mixing in a Server)
Module Type (No Mixing in a Server)
1 DIMM per channel 1 DPC
2 DIMMs per channel 2 DPC
1 DIMM per channel 1 DPC
2 DIMMs per channel 2 DPC
Registered DIMM (RDIMM, 3DS)
Registered DIMM (RDIMM, 3DS)
2666
2666
2933
2666
Load Reduced DIMM (LRDIMM, 3DS)
Load Reduced DIMM (LRDIMM, 3DS)
2666
2666
2933
2666
 
Module Type (No Mixing in a Server)
Registered DIMM (RDIMM, 3DS)
Load Reduced DIMM (LRDIMM, 3DS)
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