Pass the Supermicro MI300X GPU SMI300XS Questions and answers with CertsForce

When reinstalling trays (GPU, motherboard, or PCIe) inSupermicro MI300X GPU systems, it iscrucial to secure one end firstbefore working on the opposite end.

Why is this necessary?

To prevent tray misalignment

Trays in Supermicro systemshave specific guide rails and screwsthat must bealigned correctly before full installation.

If both ends are handled simultaneously,one end may shift, causingmounting misalignment.

Avoiding unwanted movement

If you install a tray at both ends without securing one first,it can get pushed out, leading to incorrect seating.

This can causepoor PCIe connectivity, power delivery issues, or misaligned airflow paths.

Ensuring cables are properly routed

If a tray is not secured properly,cables may shift during installation, increasing the risk of pinched or damaged cables.

Why other options are incorrect?

B (Cables getting in the way)→ While cable management is important, the key issue istray movement, not cables.

C (Tray will not function)→ The traywill function once properly seated, but incorrect installation cancause connectivity issues.

D (Tray will break)→ The tray is designed for durability;it will not break unless excessive force is applied.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Service Guideconfirms that traysmust be secured at one end before installing the opposite end to ensure proper alignment.

Why Does the Support Bar Have 6 Screws?

Thesupport bar at the rear of the motherboard trayis designed to:

Provide additional structural stability

Prevent vibration-related failures

Ensure proper alignment of PCIe slots and backplane connectors

It is secured using6 screws, arranged as:

3 screws on the left side

3 screws on the right side

Correct Removal Procedure:

✅Step 1:Identify thesix screws securing the support bar.✅Step 2:Loosen themevenly from both sidesto prevent stress on the chassis.✅Step 3:Carefully remove the support bar without twisting it.

Why Other Options Are Incorrect?

B (24 screws)→ Excessively high number; no component in this section has 24 screws.

C (12 screws)→ Incorrect count; only6 screwsare present.

D (6 screws but uneven distribution)→ There are3 screws per side, not 1 on one side and 5 on the other.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Disassembly Guideconfirmsthe support bar is secured with 6 screws (3 on each side).

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.

Components Located on Top of the Motherboard in Supermicro MI300X Systems

Fans and Fan Shrouds (Option A)

These are installedabove the motherboardtodirect airflow over the components.

Fan shrouds help focus airflow, ensuringefficient cooling of CPUs and GPUs.

Support Bar and AOM Brackets (Option B)

Thesupport bar reinforces the motherboard tray, preventing flexing.

AOM bracketshold optionalnetworking or RAID expansion modules.

Heatsinks and CPUs (Option C)

Large heatsinks are mounted on top of the CPUsto dissipate heat.

These ensureoptimal thermal managementof high-performanceAMD MI300X GPUs and processors.

Why Option D (DIMM Modules) is Incorrect?

❌DIMM modules (memory sticks) are installed in slots beside the CPU, but they arenot physically above the motherboardin a way that they could be considered a top-mounted component.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 System Overviewconfirms thatfans, heatsinks, AOM brackets, and support bars are mounted on top of the motherboard.

Why Must the Screws Be Loosened First?

ThePCIe, motherboard, and GPU trays in Supermicro MI300X systemsaresecured by screws on both sidesto ensure:

Structural stability

Vibration resistance

Secure connection of PCIe lanes and data paths

Proper Tray Removal Process:

✅Step 1:Identify the tray to be removed (PCIe, motherboard, or GPU).✅Step 2:Loosen screws on both sidesto release tension on the tray.✅Step 3:Slowly and evenlypull the tray outto avoid damaging connectors.✅Step 4:Support the tray from the bottomwhile sliding it out to prevent bending.

Why This Method Is Important?

Preventing Connector Damage→ Pulling the tray without loosening screwscould damage PCIe connectorsor misalign the board.

Avoiding Strain on Other Components→ A stuck traycould put pressure on adjacent cables and connectors.

Ensuring a Safe Removal→ The slow and controlled movementreduces the risk of accidentally dropping or flexing the tray.

Why False Is Incorrect?

IfFalse were correct, it would suggest that the tray can be removedwithout loosening screws, which isnot possibledue to the secure mounting system.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Hardware Maintenance Guideconfirms thatloosening screws and carefully pulling the tray out is the correct disengagement procedure.

Theyellow warning labelis a critical indicator toprevent damagewhen servicing themidplane and ribbon cable connections.

Reason for Warning Label:

Theflat panel/ribbon cable is delicateand isconnected between multiple system components.

If themidplane is removed first, itstretches and applies force on the ribbon cable, leading to:

Broken cable connectors

Torn ribbon cable

System interface failure(front panel controls, LED indicators, or data communication)

Why other options are incorrect?

A (Cable is hot)→ Ribbon cablesdo not generate heatand thisis not the purpose of the warning label.

B (Remove after midplane)→ Thecable must be removed BEFORE the midplane, not after.

C (Optional removal)→It is mandatory, not optional, to prevent damage.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Maintenance Manualstates thatremoving the flat panel/ribbon cable firstisa required stepbefore handling the midplane.

TheAOM (Add-On Module) cardis a crucial expansion module used inSupermicro MI300X GPU systemsfor enhanced connectivity (e.g., RAID controllers, additional network interfaces, or IPMI management).

What happens if AOM cables are misplaced?

The AOM card may not function

The system depends onspecific cabling configurationsto communicate with the AOM module.

Incorrect connections can causehardware failures, incorrect detection, or data transmission errors.

PCIe lane allocation may be disrupted

Many AOM cards usePCIe lanesfor data transmission.Misplacing cables can disable or limit their bandwidth, leading to performance degradation.

BIOS may not detect the AOM card

Some AOM cards requirefirmware initialization, which only happens if the correct ports are used.

Incorrect Answers Explained:

A (System will self-destruct)→ The systemwill not explode, butit may fail to boot properly.

B (Customer will be happy)→ Misconfigured AOM cards typically lead tosystem errors and dissatisfied customers.

D (System will function normally)→ If cables are misplaced,the system will not function properly.

Official Documentation Reference:

Supermicro MI300X GPU System Hardware Guidestates thatAOM cables must be reconnected in their proper ports for the system to function correctly.

Theflap door mechanismis a protective feature inSupermicro MI300X systemsdesigned tosecure ribbon cable connections.

How to open it correctly?

Press down on the top of the flap door→ This disengages the locking mechanism.

The flap door will "pop open" safelywithout damaging the ribbon cable.

Forcing the flap without pressing down properly may break the connector.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Maintenance Manualprovidesspecific instructionsonpressing down the flap door before opening it.

Why Are the Screws Equidistant?

Thebackplane in Supermicro MI300X systemsis alarge PCB (printed circuit board) that connects NVMe SSDs and PCIe devices to the motherboard.

It is secured byfour screws placed equidistantlyto:

Distribute mechanical stress evenly

Ensure stability against vibrations

Prevent warping or misalignment of connectors

Proper Removal of the Backplane Screws:

✅Step 1:Identify and locate the4 securing screws on the backplane.✅Step 2:Loosen them in across-pattern(diagonal pairs) to prevent stress buildup.✅Step 3:Carefully lift the backplanestraight upto avoid bending connector pins.

Why This Layout Is Important?

????Equidistant screw spacing ensures even pressure distribution, preventing PCB flexing or cracking.????Improper screw removal (one side first) can cause misalignment or undue stress on connectors.

Why False Is Incorrect?

IfFalse were correct, it would imply that screws are placedrandomly or unevenly, which isnot the case in Supermicro MI300X systems.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Installation Manualconfirms thatthe backplane is secured with 4 evenly spaced screws for structural integrity.

Themidplane bracket in Supermicro MI300X GPU systemsis secured with6 screwsthat must beremoved before disassembly.

Why 6 screws?

3 screws on each side of the chassishold the midplane bracket in place.

This design helps stabilize the midplaneand prevents movement.

Failure to remove all 6 screws can result in forcefully damaging the bracket.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Disassembly Manualspecifies that6 screws must be removed before handling the midplane bracket.