Themidplane in Supermicro MI300X GPU systemsis responsible for interconnecting several system components. The twoprimary cablesthat must be removed before handling themidplaneare:
I2C Cable (Inter-Integrated Circuit Cable)
This cable is used forsensor data, system monitoring, and thermal control.
If not disconnected, it couldsnap or cause sensor miscommunicationbetween the motherboard and the backplane.
Power Cable
This cablesupplies powerto the midplane andmust be disconnected before removalto avoid electrical damage.
Removing the midplanewhile power cables are still attachedcould short-circuit the system.
Why is this step necessary?
Supermicro's official documentation states that both the I2C and power cables must be disconnected before handling the midplane.
Failure to remove these cables properly can cause permanent damage to connectors and the system board.
Official Documentation Reference:
Supermicro AS-8125GS-TNMR2 Maintenance Manualconfirms thatdisconnecting the I2C and power cables is mandatory before midplane removal.
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit