[Dec 01, 2025] SMI300XS Exam Dumps 100% Same Q&A In Your Real Exam
SMI300XS Test Engine Dumps Training With 44 Questions
NEW QUESTION # 20
After removing the screws from the midplane bracket, what cables must be removed?(Choose 2 answers.)
- A. Power cable
- B. MCIO cable
- C. SATA cable
- D. Flat panel/ribbon cable
Answer: B,D
Explanation:
Themidplane bracketinSupermicro MI300X GPU systemsconnects multiple crucial components, including storage, PCIe devices, and power distribution systems.
Why must the MCIO and Flat Panel/Ribbon cables be removed?
* MCIO Cable (Option B)#
* MCIO (Multi-lane Cable I/O)cables are responsible forhigh-speed NVMe communication between the motherboard and storage components.
* These cables must bedisconnected before midplane removal, asforcing them out without removal can cause connector damage.
* Flat Panel/Ribbon Cable (Option C)#
* Theflat panel/ribbon cableis used forsystem communication, front panel connectivity, or sensor data transmission.
* If not removed, it can be torn or pinched, leading tomalfunctioning front panel indicators, buttons, or management controllers.
Incorrect Answers Explained:
* A (Power cable)# Power cables are usuallysecured independentlyand arenot directly attached to the midplane bracket. Removing them isnot a required stepfor midplane bracket removal.
* D (SATA cable)# SATA cables arefor legacy storage systemsanddo not need to be disconnected unless working on SATA-specific backplanes.
Official Documentation Reference:
* SupermicroService ManualforAS-8125GS-TNMR2explicitly states thatMCIO cables and ribbon cables must be removed before handling the midplane bracketto preventsystem damage.
NEW QUESTION # 21
What are the components on top of the motherboard in the AS-8125GS-TNMR2 system?(Choose 3 answers)
- A. Fans and fan shrouds
- B. DIMM modules
- C. Heatsinks and CPUs
- D. Support bar and AOM brackets
Answer: A,C,D
Explanation:
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.
NEW QUESTION # 22
You will need to remove 6 screws from the sides of the chassis in order to remove the midplane bracket.
True or False?
- A. True
- B. False
Answer: A
Explanation:
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.
NEW QUESTION # 23
Why is there a yellow warning label on the flat panel/ribbon cable?
- A. To warn you that you must remove the flat panel/ribbon cable before removing the midplane from the chassis or you will damage the cable.
- B. To warn you that you can optionally remove the flat panel cable before removing the midplane from the chassis or you will damage the cable.
- C. To warn you that the cable is hot.
- D. To warn you that you must remove the flat panel cable after removing the midplane from the chassis or you will damage the cable.
Answer: A
NEW QUESTION # 24
What equipment is required in order to remove the heatsink from the motherboard tray?
- A. T20 Torx bit
- B. T40 Torx bit
- C. T30 Torx bit
- D. PH2 Phillips screwdriver
Answer: C
Explanation:
To remove theheatsink from the motherboard tray,a T30 Torx bit is required. This tool ensuresproper torque applicationandprevents damageto both the heatsink and the motherboard.
Why a T30 Torx bit is necessary?
* Supermicro MI300X GPU systems use precision heatsink retention mechanisms.
* Theheatsink screws are secured with factory torque settingsand require aT30 Torx bitfor safe removal.
* Using an incorrect tool (Phillips screwdriver, T20, or T40) can strip the screw heads, making it difficult to remove the heatsink without causing damage.
Incorrect Answers Explained:
* A (PH2 Phillips screwdriver)# Not strong enough for heatsink screws, which requirehigh torquefor proper seating.
* C (T20 Torx bit)# Toosmall, risksstrippingthe screws.
* D (T40 Torx bit)# Toolarge, does not fit the heatsink screws.
Official Documentation Reference:
* Supermicro MI300X Service Manualspecifies that aT30 Torx bitmust be used to remove the heatsink without damaging the motherboard.
NEW QUESTION # 25
Exhibit:
To remove the midplane lid on the AS-8125GS-TNMR2 system, use your fingers to push in on the two handles toward the PCIe tray, then slowly lift the midplane lid up and out of the chassis at an angle.
True or False?
- A. True
- B. False
Answer: A
Explanation:
* Themidplane lid removal processis designed to betool-freeand follows aspecific sequence to avoid damage.
* Thecorrect methodis:
* Push in on the two handleslocated near thePCIe tray.
* Slowly lift the midplane lid up, ensuring it does not catch on other components.
* Remove the lid at an angleto avoid damaging adjacent connectors.
Why this method is used?
* Theangled removalhelpsavoid contact with fragile connectorson the midplane.
* Forcing the lid straight upcould damage PCIe slots or motherboard connectors.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Disassembly Manualdetails thecorrect method for removing the midplane lid.
NEW QUESTION # 26
Which cables need to be reconnected after installing the NVMe backplane?
- A. Only the i2C Cable
- B. Only the Power Cable
- C. i2C Cable, SAS Cable, Power Cable
- D. Only the SAS Cable
Answer: C
Explanation:
NVMe Backplane Connection Requirements in Supermicro MI300X Systems
Afterinstalling the NVMe backplane, the following cablesmust be reconnectedfor proper system functionality:
* i2C Cable(Inter-Integrated Circuit Cable)
* Responsible fordata communication, sensor monitoring, and system management functions.
* Ensures thatstorage devices are properly detectedby the motherboard.
* SAS Cable(Serial Attached SCSI)
* Used forhigh-speed storage connectivityin hybrid NVMe/SAS systems.
* Ensuresdata integrity and fast data transfers between SSDs and the system controller.
* Power Cable
* Supplies power to the NVMe backplaneandconnected drives.
* Without this,NVMe drives will not receive power and will not be detected by the system.
Why Other Options Are Incorrect?
* B (Only the SAS Cable)# While the SAS cable is important,the power cable and i2C cable are also required.
* C (Only the i2C Cable)# The i2C cable isnot sufficient by itself; the NVMe backplaneneeds both power and data connections.
* D (Only the Power Cable)# Power is needed, butdata connectivity through SAS and i2C is essential for full functionality.
Official Documentation Reference:
* Supermicro NVMe Storage System Guideconfirms thati2C, SAS, and power cables must all be reconnected after NVMe backplane installation.
NEW QUESTION # 27
Before removing the NVMe backplane, which component must be removed first?
- A. GPU Tray
- B. Power Supply Unit
- C. Motherboard Tray
- D. PCIe Expansion Cards
Answer: C
Explanation:
Why Must the Motherboard Tray Be Removed First?
TheNVMe backplane in Supermicro MI300X systemsis installedbehind the motherboard tray. This means themotherboard tray acts as a barrier, andit must be removed before gaining access to the NVMe backplane.
Step-by-Step Removal Process:
* Power Down and Disconnect Power Supply Units (PSUs)
* Turn off the system anddisconnect all power cablesto avoid electrical damage.
* Remove PCIe Expansion Cards(if applicable)
* Some systems have PCIe devicesmounted over the NVMe backplane, which must be removed first.
* Disengage the Motherboard Tray
* The motherboard tray must be unscrewed and carefully lifted outbefore accessing the NVMe backplane.
* Now, Remove the NVMe Backplane
* Once the motherboard tray is out, theNVMe backplane is fully exposed, allowing it to be removed.
Why Other Options Are Incorrect?
* A (GPU Tray)# The GPU tray isnot blocking direct accessto the NVMe backplane.
* C (Power Supply Unit)# The PSU isnot directly obstructingthe NVMe backplane, although it should be powered down.
* D (PCIe Expansion Cards)# These may need to be removedif installed over the NVMe backplane, but themotherboard tray is the primary component that blocks direct access.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Installation Guideexplicitly states thatthe motherboard tray must be removed before handling the NVMe backplane.
NEW QUESTION # 28
Exhibit:
How many screws need to be removed from the support bar located at the rear of the motherboard tray?
- A. 6 screws (1 on the left side and 5 on the right side of the tray)
- B. 6 screws (3 on the left side and 3 on the right side of the tray)
- C. 24 screws (6 on the left side and 18 on the right side of the tray)
- D. 12 screws (2 on the left side and 10 on the right side of the tray)
Answer: B
Explanation:
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).
NEW QUESTION # 29
When lowering the midplane bracket back into the chassis, what should you make sure to do with all the cables?
- A. Move only the power cable out of the way as you lower the bracket.
- B. Move all the cables out of the way as you lower the bracket.
- C. Move only the ribbon cable out of the way as you lower the bracket.
- D. Move only the I2C cable out of the way as you lower the bracket.
Answer: B
Explanation:
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 potential short 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.
NEW QUESTION # 30
Exhibit:
When installing the midplane bracket back into the chassis, what design feature in the chassis helps you properly align the midplane bracket?
- A. Guide stickers in the chassis
- B. Velcro in the chassis
- C. Grooves in the chassis
- D. Arrows in the chassis
Answer: C
Explanation:
Why Do Supermicro Systems Use Grooves for Alignment?
InSupermicro MI300X systems, themidplane bracket is aligned using built-in grooves in the chassis.
* Ensures Perfect Alignment
* The midplane mustline up perfectlywith power, PCIe, and data connections.
* Grooves act as physical guides, ensuringprecise placementwithout guesswork.
* Prevents Installation Errors
* Without grooves, technicians mightinstall the midplane slightly misaligned, leading to connection failures.
* Ensures PCIe and MCIO lanes align correctly, preventing signal loss.
* Supports a Tool-Free Installation
* Grooves allowdrop-in installation, reducingmanual adjustments.
* Minimizes risk of flexing or damaging the midplane PCB.
Why Other Options Are Incorrect?
* A (Guide stickers in the chassis)# Stickersmay be present for labeling but do not physically align the midplane.
* C (Arrows in the chassis)# Arrows arevisual indicators only, not physical alignment tools.
* D (Velcro in the chassis)# Velcro isnot used in midplane installation.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Hardware Guideexplicitly states thatgrooves in the chassis help with midplane bracket alignment.
NEW QUESTION # 31
Once you have removed all 12 screws that secure the motherboard to the motherboard tray, what is the proper way to remove the motherboard?
- A. Tilt the chassis to shake it out of the tray.
- B. Make sure to touch the pins and shove the motherboard out of the tray.
- C. Use one hand the entire time to remove the motherboard tray and hold the motherboard in the bottom center as if you're holding a pizza.
- D. Avoid touching the pins and carefully slide the motherboard slightly out of the rear of the tray, then place one hand underneath the rear of the tray and continue sliding the motherboard out of the tray without tilting it up or down.
Answer: D
Explanation:
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 of bending or dropping the motherboard.
* C (Tilt chassis & shake it out)# This is acompletely impropermethod and canseriously damage connectors and PCB components.
Official Documentation Reference:
* Supermicro MI300X System Removal Guideadvises toslide the motherboard out carefully while supporting it underneath.
NEW QUESTION # 32
You must remove the motherboard tray from the chassis before you can access the NVMe backplane.
True or False?
- A. True
- B. False
Answer: A
Explanation:
InSupermicro MI300X GPU systems, theNVMe backplane is located behind the motherboard tray, meaning the tray must be removed first.
Why is this step necessary?
* The NVMe backplane is physically secured behind the motherboard trayto support high-speed PCIe connectivity.
* Removing the motherboard tray provides clear accessto NVMe connectors and MCIO cables.
* Skipping this step may cause unnecessary strain on cables, leading to potential connector damage.
Official Documentation Reference:
* Supermicro Service Guide for NVMe Systemsconfirms that themotherboard tray must be removed firstbefore working on the NVMe backplane.
NEW QUESTION # 33
Where is the one screw that needs to be removed in order to remove the AOM bracket?
- A. On the rear of the power supply
- B. On top of the hard drive tray
- C. On the side of the motherboard tray
- D. On top of the fan tray
Answer: C
Explanation:
Understanding the AOM Bracket in Supermicro MI300X Systems
TheAOM (Add-On Module) bracketis used to holdoptional expansion cards, such as:
* RAID controllers
* Additional network interface cards (NICs)
* BMC/IPMI modules for system management
Why is the Screw Located on the Side of the Motherboard Tray?
* The AOM bracket is secured to the chassis via a single screwthat is located on theside of the motherboard tray.
* This designkeeps the bracket firmly in placewhile still allowing foreasy removal when needed.
* Removing the screw first prevents unnecessary strain on the bracketand ensuressafe removal of the AOM card.
Why Other Options Are Incorrect?
* A (On top of the hard drive tray)# The hard drive tray does not secure the AOM bracket.
* B (On top of the fan tray)# Fans do not hold down the AOM bracket.
* D (On the rear of the power supply)# The power supplyis not directly connected to the AOM bracket.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Expansion Module Guidespecifies that theAOM bracket is secured by a single screw located on the side of the motherboard tray.
NEW QUESTION # 34
Before disconnecting the cables from the NVMe backplane, what precaution should be taken?
- A. Shake the system to loosen cables before disconnecting them.
- B. Randomly disconnect cables and reconnect them later.
- C. Map the cables so that you can reconnect them to the proper port location later on.
- D. Disconnect the power supply first.
Answer: C
Explanation:
Importance of Mapping Cables Before Disconnection
TheNVMe backplaneinSupermicro MI300X systemsuseshigh-speed PCIe lanesandpower distribution linesthat must beproperly mapped before disconnection.
Why Should Cables Be Mapped?
* Prevents misconnection during reassembly
* The system usesmultiple identical-looking cables(MCIO, NVMe, and power cables).
* Misplacing a cable in the wrong portcan causeboot failures, drive detection issues, and system instability.
* Reduces downtime for troubleshooting
* Without a mapped diagram or a picture, technicians may spendhours debugging misconnected cables, leading todelays in system restoration.
* Ensures proper airflow and cable management
* Incorrectly routed cablescanblock airflow, leading tooverheating and thermal throttling of GPUs or storage devices.
Correct Process for Cable Mapping
* Take high-resolution picturesbefore disconnecting cables.
* Label each cable and its corresponding portusing numbered stickers or colored tags.
* Create a simple mapping diagramshowing which cable connects to which port.
* Double-check the mapping before removal.
Why Other Options Are Incorrect?
* B (Disconnect the power supply first)# While powering down is important,mapping cables is the primary precaution before disconnection.
* C (Randomly disconnect cables)# Leads to confusion and potential system failures due to incorrect reconnections.
* D (Shake the system to loosen cables)#NEVER shake a server, as this can damage internal components and misalign connectors.
Official Documentation Reference:
* Supermicro NVMe Installation Guidestates thatproper cable mapping is required before NVMe backplane disconnectionto avoid misplacement.
NEW QUESTION # 35
Once you remove the midplane lid from the AS-8125GS-TNMR2 system, how many total screws must be removed from the sides of the chassis in order to remove the midplane bracket?
- A. 6 screws total (3 on each side of the chassis)
- B. 8 screws total (4 on each side of the chassis)
- C. 2 screws total (1 on each side of the chassis)
- D. 4 screws total (2 on each side of the chassis)
Answer: D
Explanation:
To remove themidplane bracketin theAS-8125GS-TNMR2 system, you must remove4 screws total(2 on each side of the chassis).
Why 4 screws?
* The midplane bracket is secured by 2 screws per sideto maintain its structural integrity.
* Loosening all 4 screws allows safe removal without excessive force.
* Forcing the bracket without removing the screws risks damaging the mounting points.
Incorrect Answers Explained:
* A (2 screws total)# Not enough, as screws on both sides must be removed.
* C (8 screws total)# More than necessary;only 4 screws hold the midplane bracket.
* D (6 screws total)# Incorrect count;only 2 screws per side are required.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Installation Guideexplicitly states thattwo screws on each side (4 total) must be removed to release the midplane bracket.
NEW QUESTION # 36
How can the 4 MCIO cables located in the center of the motherboard be released and unlocked?
- A. Grip both sides of the orange connectors and pull really hard
- B. Loosen the bolts holding down the MCIO cables
- C. Remove the screws holding down the MCIO cables
- D. Press down on their release levers to unlock them
Answer: D
Explanation:
Understanding MCIO Cables in Supermicro MI300X Systems
* MCIO (Multi-lane Cable I/O) connectorsare used forhigh-speed data transmission between the motherboard and NVMe SSDs or PCIe devices.
* These connectorsmust be handled carefully, as improper removal cancause pin damageorpermanent failure of the interface.
How to Properly Unlock and Release MCIO Cables
* Locate the release levers on the MCIO connectors
* Each MCIO connector has asmall built-in release leverthat locks it in place.
* Press down on the release levers
* This disengages the locking mechanism andallows the cable to slide out easily.
* Gently pull the MCIO cable straight out
* Do not pull at an angleas it can damage thehigh-density connector pins.
Why Other Options Are Incorrect?
* A (Pull really hard)# Forcing the connector without releasing the latch canbreak the MCIO pins or damage the motherboard socket.
* B (Remove screws)# MCIO cablesdo not use screws; they have built-in locking mechanisms.
* D (Loosen bolts)# There areno boltssecuring MCIO cables; only therelease lever is needed for unlocking.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Motherboard Manualstates thatpressing down on the release levers is the correct method to unlock MCIO cables.
NEW QUESTION # 37
Exhibit:
There is a flap door over the ribbon cable connection. To open it, use your finger to press down on the top of the flap door and pop it open. True or False?
- A. True
- B. False
Answer: A
Explanation:
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.
NEW QUESTION # 38
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