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SERVER

OCP NIC Community Update�August 2023

For Server Project�����Sub-group Project wiki: https://www.opencompute.org/wiki/Server/NIC�

Mailing List: https://ocp-all.groups.io/g/OCP-NIC

NIC3.0

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Agenda

  • SI Test Fixture update
  • PCIe Gen6 update
  • Double-wide SFF update

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SI Test Fixtures

CLB 5.0 32GT/s status:

    • Dell to present at IC meeting to release design to Wiki

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CBB 5.0 32GT/s status:

    • Assembled units arrived – testing in progress
    • PCB material exposed a solder mask issue with MMPX connectors; layout revised.

OCP NIC 3.0 SFF CLB 5.0 prototype

Calibration

CLB board 1

Impedance Coupon

CLB board 2

Jason

OCP NIC 3.0 SFF CBB 5.0 block diagram

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SIWG for PAM4 Gen6 spec

Xtalk spec to meet BER requirement

    • SFF-TA-1002 proposal(rev 1.4.1) in progress, will leverage
    • SFF-TA-1009 proposal(rev 3.1.1) for device spec
    • WIP to check for channel simulations
    • Working with device vendor to meet Rx spec

Anthony/Tanmoy

Connector Spec

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Smart NICs - LFF vs SFF

SFF and LFF are not plug-compatible

Platforms and adapters are commonly SFF today

Ideas: Double-SFF (D-SFF) which fits into two SFF slots

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Requires Different Connector

New DSFF

Uses same connectors

Motherboard with 1x LFF

Motherboard with 2x SFF

SFF

SFF

LFF

Arnon/Harvey

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Idea - Double SFF for Smart NICs

Spans over two 4C+ connectors

Spaced per M-FLW HPM specification

Regular and Tall options

160 Watt

x32 PCIe lanes

13% more board space than LFF

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Opens:

    • Management scheme
    • Latching mechanism
    • More

Illustration

Arnon/Harvey

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Gather feedback throughout the year

Provide your feedback at:�https://tinyurl.com/feedback2ocpnic