Supermicro SMI300XS - Supermicro MI300X GPU Service Specialist (SMI300XS) Exam

Removing themidplanein aSupermicro MI300X GPU systemrequiresdisengaging multiple system trays and power componentsbeforehand.

Why is this necessary?

Power must be fully disengaged before midplane removal

The midplane is directly connected topower distribution units (PDUs).

If power is not removed, it can causeshort circuits or hardware damage.

PCIe, motherboard, and GPU trays block access

These trays must be disengagedbefore removing the midplane, as they contain components directly connected to it.

Dummy PSUs must also be removed

Even inactive PSUs containlocking mechanismsthat must be disengaged.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 System Removal Guideconfirms thatPSUs, dummy PSUs, PCIe trays, motherboard trays, and GPU trays must be removed before handling the midplane.

When servicing theSupermicro MI300X GPU system, there are3 screwssecuring thebracket at the bottom of the motherboard trayin front of the backplane.

Purpose of these screws:

They secure the backplane’s structural integrityto prevent vibration-related failures.

Loosening them allows the removal or replacement of backplane componentssafely.

They prevent accidental disconnectionscaused by handling or system movement.

Why other options are incorrect?

A (13 screws)→ This number istoo highfor just the bottom bracket.

B (21 screws) & C (30 screws)→ These numbersapply to entire system disassembly, not just the bottom bracket.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Disassembly Guidespecifies thatonly 3 screwsneed to be loosened to access thebottom bracket securing the backplane.