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

Removing the motherboardrequires careful handlingto preventbending pins, PCB damage, or static discharge.

Correct Removal Process:

First, remove all 12 screws securing the motherboard.

Avoid touching any exposed pins or contacts.

Carefully slide the motherboard slightly out of the rear of the tray.

Support it with one hand underneath to prevent bending.

Continue sliding it out without tilting it.

Why other options are incorrect?

A (Touch pins & shove motherboard)→ Touching pins cancause electrostatic damageandforcing it out can damage components.

B (Hold like a pizza)→ Usingone handdoes not provide enough support, increasing the risk ofbending or dropping the motherboard.

C (Tilt chassis & shake it out)→ This is acompletely impropermethod and canseriously damageconnectors and PCB components.

Official Documentation Reference:

Supermicro MI300X System Removal Guideadvises toslide the motherboard out carefully while supporting it underneath.

Why Must All Cables Be Moved Out of the Way?

Themidplane bracket in Supermicro MI300X GPU systemshousesmultiple power and data connections. If cables are not movedout of the way before lowering the bracket, the following issues can occur:

Cable Pinching or Crushing

If cables are trapped beneath the midplane,their insulation can get damaged, leading to potentialshort circuits or power failures.

Improper Connector Alignment

Misplaced cablesmay obstruct connector seating, preventingMCIO, PCIe, or NVMe connections from fully engaging.

Potential Performance Issues

If data cables are twisted or bent sharply,signal integrity issuesmay arise, causingintermittent connectivity failures.

Step-by-Step Safe Midplane Installation:

✅Step 1:Identify all power and data cables before lowering the midplane bracket.✅Step 2:Move all cables out of the way and neatly route them along their designated pathways.✅Step 3:Slowly lower the midplane bracket into position, ensuring cables remain free from obstruction.✅Step 4:Check that all connectors are accessible and that no cables are trapped under the bracket.

Why Other Options Are Incorrect?

A (Only move the ribbon cable)→ Other cables may still be in the way, risking damage.

B (Only move the power cable)→ Power cables are important, butdata cables must also be repositioned.

C (Only move the I2C cable)→ The I2C cable alone is not enough;all cables need clearance.

Official Documentation Reference:

Supermicro AS-8125GS-TNMR2 Service Manualspecifies thatall cables must be moved before lowering the midplane bracket to avoid obstruction and damage.

ForSupermicro MI300X GPU systems,removing the power supply unit (PSU) improperlycan lead to serious issues.

Why the red lock exists?

Thered locking mechanismensures that thePSU is properly securedin the system.

Before disengaging the PSU, thered lock must first be unlockedto avoid damage.

If you forcefully shift the release lever without unlocking the red lock:

B: The power supply unit will fail→ If the PSU is removed improperly, it can causeinternal damageto power connectors, resulting in PSUfailure or improper functioning.

C: You could permanently damage the lock on the power supply unit→ Thelocking mechanismis designed for smooth disengagement. Forcefully shifting the lever canbreak or warpthe lock, making itimpossible to secure the PSU back in place.

Incorrect Answers Explained:

A (All answers are correct)→ This is incorrect becausenot all answers are valid.

D (The PSU can no longer be secured into the tray)→ This happensonly if the lock is damaged, which is covered underoption C.

Supermicro’s official documentation clearly statesthatunlocking the red lock firstis a critical step before removing or replacing the PSU.

When reinstalling theNVMe backplane, several critical cables must be properlyreconnectedto ensure the system functions correctly.

Required Connections:

SATA Cable→ Some NVMe backplanesalso support SATA drives, requiring SATA connectivity.

Power Cables→ The NVMe backplanerequires direct powerto enable SSD operations.

MCIO Cables→ These cables providehigh-speed data connectivitybetween the NVMe drives and the motherboard.

54-Volt Power Cable→ Thissupplies direct powerto the NVMe backplane foroptimal performance and stability.

Why other options are incorrect?

B (Only SATA cable)→ NVMe backplanes usePCIe-based storage. While SATA connectionsmayexist,they are not the only required cables.

C (Only MCIO cables)→ While MCIO cables are necessary for PCIe-based NVMe drives,power cables must also be reconnectedfor the system to function.

D (Only power cables)→Data communication would failwithout MCIO connections, rendering the systemunable to detect NVMe drives.

Official Documentation Reference:

Supermicro NVMe Service GuideandAS-8125GS-TNMR2 Installation Manualemphasize thecorrect reinstallation of power and data cablesto avoidhardware malfunctions.