2 of 10

SERVER

OCP NIC Community Update�May 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

3 of 10

Agenda

Thermal Test Fixture update
SI Test Fixture update
iPassLab SI fixture & Test solution provider

4 of 10

TSFF Thermal Test Fixture: Background

New TSFF test fixture

5 of 10

TSFF Airflow Distribution Issue

NVIDIA performed tests with the new test fixture and encountered an issue related to airflow distribution.

Due to the geometry of the test chamber and front panel perforation, a fraction of the air leaks to the sides of the test fixture but exit through the bracket area. This airflow is not typical for servers where if the leakages occurs – the air pass through the other holes in the front panel of the server

The purpose of this work is:

To explore potential solutions to the airflow leakage problem to gain better fit to servers’ environment.
Propose a better way to define the airflow during the tests and for thermal simulations.

6 of 10

TSFF Thermal Test fixture: Side holes solution

Holes were added at the sides of the test chamber to allow the leaked airflow to flow to the sides.

Geometry 2 inside the proposed TSFF test fixture

7 of 10

OCP NIC SI Test Fixtures

CLB 5.0 32GT/s status:

2^nd set protos

Keysight, Broadcom received CLB samples. Keysight provided impedance & SDD21 results (See April 2023)
Impedance ~89 ohms, within manufacturing tolerance

First protos impedance mismatch due to manufacturing defect yielding ~95 ohms, out of tolerance
Dell to release the design with a user guide to the Wiki, target end of May; coordinating with IOL for retail sale

CBB 5.0 32GT/s status:

Gerbered March 3^rd , PCB material en-route, assembled units arriving ~May 15^th. Dell seeking volunteer(s) for SI testing
Based on 4.0 design; updates to align with PCI-SIG^®

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

1 of 10

2 of 10

3 of 10

4 of 10

5 of 10

6 of 10

7 of 10

8 of 10

9 of 10

10 of 10