OpenCAPI & DDR4 Differential DIMM (DDIMM)




SMART Modular is part of a growing roster of technology organizations that are contributing to the OpenCAPI Consortium and driving data center server innovation. Through the Consortium, members are working collaboratively to innovate on top of OpenCAPI, a high performance coherent bus standard designed to help the technology industry work to better meet growing demands for more advanced memory, accelerators, networking and storage technology.



The performance, virtual addressing and coherence capabilities allow FPGA and ASIC accelerators to behave as if they were integrated into a custom microprocessor.


Coherent Network Controller

OpenCAPI provides the bandwidth that will be needed to support rapidly increasing network speeds. Network controllers based on virtual addressing can eliminate software overhead without the programming complexity usually associated with user level network protocols.


Advanced Memory

OpenCAPI allows storage controllers to bypass kernel software overhead, enabling extreme IOPS performance without wasting valuable CPU cycles.



SMART's DDR4 Differential DIMM (DDIMM) is a leading-edge transformative memory module that enables a data throughput rate of 25.6GB/s with a latency of 40ns and densities up to 256GB. The new 84-pin DDR4 DDIMM is intended for use in standard server environments. It utilizes a serial interface and a differential Data Buffer (dDB) from Microsemi. The DDIMM supports IBM's P9 prime (P9P) and P10 processors' memory attached architecture. Diagram below.


Features and Benefits

  • Throughput of 25.6GB/s
  • Latency of 40ns
  • Serial interface
  • High speed data transfer rates
  • High density up to 256GB



  • Data centric and hybrid computing
  • Servers and data centers
  • Supports IBM's P9 with Advanced IO (AIO)



SMART Part Number Density Height (mm) Device Config Module Config Speed Voltage Temp.
SR8197DE440425HC 64GB 64.55 4Gx4 2Rx4 DDR4-3200 1.2 0˚C to +70˚C
SR4097DE420425HE 32GB 64.55 2Gx4 2Rx4 DDR4-3200 1.2 0˚C to +70˚C
SR2047DE420425HE 16GB 30.35 2Gx4 1Rx4 DDR4-3200 1.2 0˚C to +70˚C


Reading Material

Future of Persistent Memory DRAM and SSD Form Factors Aligned with New System Architectures

Ordering Information

For more information on the OpenCAPI platform and SMART's Differential DIMM (DDIMM) products, please Contact Us.