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NEW QUESTION # 20
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 # 21
After removing the screws from the midplane bracket, what cables must be removed?(Choose 2 answers.)
- A. Flat panel/ribbon cable
- B. SATA cable
- C. Power cable
- D. MCIO cable
Answer: A,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 # 22
Which cable connecting the AOM card to the motherboard is NOT a data cable?
- A. MCIO cables
- B. JNCIS1
- C. SAS cable
- D. Power cable
Answer: D
Explanation:
Thepower cableis the only cable that isnot a data cablewhen connecting an AOM card to the motherboard.
Cable Functionality Breakdown:
* A (Power Cable) # NOT a data cable
* Supplies electrical powerto the AOM card.
* Doesnot transmit databetween components.
* B (MCIO Cables) # Data cables
* These cablestransmit high-speed NVMe data.
* C (JNCIS1) # Data cable
* This interface is used formanagement and communication.
* D (SAS Cable) # Data cable
* Used fordata storage connections.
Official Documentation Reference:
* Supermicro AOM Expansion Module Guidestates that thepower cable is the only non-data cablein AOM installations.
NEW QUESTION # 23
What equipment is required in order to remove the heatsink from the motherboard tray?
- A. PH2 Phillips screwdriver
- B. T30 Torx bit
- C. T40 Torx bit
- D. T20 Torx bit
Answer: B
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 # 24
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. 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.
- B. Make sure to touch the pins and shove the motherboard out of the tray.
- C. Tilt the chassis to shake it out of the tray.
- 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 # 25
Exhibit:
What is the proper way to remove the backplane from the motherboard tray?
- A. Use both hands to tilt the top of the backplane towards you and lift it up and out of the motherboard tray.
- B. Hold the start button and press left and right buttons to get more lives.
- C. Ask a data center technician to remove it for you.
- D. Use one hand to grab one side of the motherboard tray and rip the backplane out.
Answer: A
Explanation:
Thecorrect and safemethod to remove the backplane from the motherboard tray is to useboth hands, gently tilting thetop of the backplanetowards yourself while carefullylifting it up and outof the motherboard tray.
This ensures that:
* No undue forceis applied to the connectors or PCB.
* No components or cablesare unintentionally damaged.
* Proper handling of static-sensitive componentsis maintained.
Removing the backplane improperly can result in:
* Connector damageto the motherboard or backplane.
* PCB warping, which could lead to future malfunctions.
* Potential data center downtimedue to component failure.
According toSupermicro's official documentation, this method aligns withindustry best practicesand recommended service proceduresforSupermicro MI300X GPU systems.
NEW QUESTION # 26
The SKU for the NVMe backplane is BPN-NVME5-HS219N-S24. True or False?
- A. True
- B. False
Answer: B
Explanation:
* The SKU (Stock Keeping Unit) forSupermicro NVMe backplanesvaries depending on thespecific model and system configuration.
* Thecorrect SKU for the NVMe backplane used in the Supermicro MI300X system differs from the given part number.
* Referencingofficial Supermicro product sheets and service manuals, theBPN-NVME5-HS219N- S24 does not matchthe correct SKU for this system.
Official Documentation Reference:
* Supermicro NVMe Storage System Compatibility Guidelists the correct SKU for MI300X GPU systems, confirming that the given SKU is incorrect.
NEW QUESTION # 27
Exhibit:
The 2 cables attached to the midplane on the side closest to the PCIe tray that need to be removed are the I2C cable and power cable. True or False?
- A. True
- B. False
Answer: A
Explanation:
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.
NEW QUESTION # 28
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. 8 screws total (4 on each side of the chassis)
- B. 2 screws total (1 on each side of the chassis)
- C. 6 screws total (3 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 # 29
Why is there a yellow warning label on the flat panel/ribbon cable?
- A. 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.
- B. To warn you that you must remove the flat panel cable after removing the midplane from the chassis or you will damage the cable.
- C. 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.
- D. To warn you that the cable is hot.
Answer: C
NEW QUESTION # 30
To disengage a PCIe, motherboard, or GPU tray on the AS-8125GS-TNMR2 system, loosen the screws on either side of the tray, then slowly pull the tray out to disengage it. True or False?
- A. True
- B. False
Answer: A
Explanation:
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 sides to 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 is not 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.
NEW QUESTION # 31
Where is the one screw that needs to be removed in order to remove the AOM bracket?
- A. On top of the fan tray
- B. On the side of the motherboard tray
- C. On the rear of the power supply
- D. On top of the hard drive tray
Answer: B
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 # 32
In order to remove the midplane from the AS-8125GS-TNMR2 system, and after you remove all the PSUs, you will need to disengage 3 trays. What is the correct order for disengagement?
- A. Disengage the PCIe tray first, then the GPU tray, and the motherboard tray last.
- B. Disengage the PCIe tray first, then the motherboard tray, and the GPU tray last.
- C. Disengage the GPU tray first, then the motherboard tray, and the PCIe tray last.
- D. Disengage the motherboard tray first, then the PCIe tray, and the GPU tray last.
Answer: A
Explanation:
Thecorrect order for removing trays before midplane removalis:
* Disengage the PCIe tray first
* This tray must be removed first becauseit provides access to the underlying system components
.
* Remove the GPU tray
* TheGPU tray sits between the PCIe and motherboard traysand must be disengaged after PCIe components are cleared.
* Remove the motherboard tray last
* The motherboard tray isthe final component before midplane removal.
* Removing it lastensures full accessto the system componentswithout obstructing critical connections.
Why other options are incorrect?
* B (Motherboard before GPU tray)# The motherboard tray must be removedlastto avoid disconnecting system-critical connections too early.
* C (Motherboard tray first)# Removing the motherboard firstrisks damagingPCIe and GPU components.
* D (GPU tray first)# TheGPU tray is dependent on the PCIe tray being removed first, making this order incorrect.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 System Removal Guideoutlines the correct order fortray disengagement before midplane removal.
NEW QUESTION # 33
When lowering the midplane bracket back into the chassis, what should you make sure to do with all the cables?
- A. Move all the cables out of the way as you lower the bracket.
- B. Move only the ribbon cable out of the way as you lower the bracket.
- C. Move only the power 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: A
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 # 34
Before reinstalling the motherboard tray, what critical step should be taken to ensure proper installation?
- A. Align the motherboard tray with the grooves in the chassis
- B. Shake the tray to confirm it fits properly
- C. Tilt the motherboard tray at an angle before placing it
- D. Screw in the motherboard tray at random points before aligning it
Answer: A
Explanation:
Why Must the Motherboard Tray Be Aligned With the Grooves?
* TheSupermicro MI300X chassisis designed withbuilt-in alignment groovesthat helpprecisely position the motherboard tray.
* If the tray is notaligned properly:
* ThePCIe slots and mounting points will not line up correctly.
* Thebackplane connections may be misaligned, leading to system boot errors.
* Improper installation can block airflow, leading to potential overheating issues.
Step-by-Step Proper Reinstallation Process:
#Step 1:Identify thealignment grooveson the chassis.#Step 2:Slowly slide the motherboard tray into place, ensuring it follows the grooves.#Step 3:Verify that the tray sitsflushwith the chassis.#Step 4:Secure the tray with screws only after confirming proper alignment.
Why Other Options Are Incorrect?
* B (Shake the tray to confirm fit)# Shaking the traycan loosen connectors and potentially damage components.
* C (Screw in randomly before aligning)# If screws are installedbefore alignment, it can causeuneven seating and difficulty in securing other components.
* D (Tilt the motherboard tray at an angle)# The tray should be insertedstraight into the grooves, not at an angle.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Installation Guideconfirms thatthe motherboard tray must be aligned with the chassis grooves before securing it.
NEW QUESTION # 35
Before disconnecting the cables from the NVMe backplane, you should map or take a picture of the cables to ensure they are returned to the same locations. True or False?
- A. True
- B. False
Answer: A
Explanation:
When working withSupermicro MI300X GPU systems, it ishighly recommendedtomap or take a picture of cable connections before disconnection.
Reasons:
* Ensuring Proper Reconnection# NVMe backplanes have multiplecritical connections(MCIO cables, power cables, data lanes, and SAS connections). Misplacing any of these cables could cause:
* Boot failures
* Drive detection issues
* Performance degradation
* Avoiding Errors in Cable Routing# Supermicro documentation states thatimproperly routed cables can obstruct airflow, potentially leading tooverheatingin high-performance systems.
* Easing Future Troubleshooting# If issues arise after reassembly, aphoto or cable mapallows engineers toquickly verifywhether cables werereconnected properly.
This best practice isofficially recommendedinSupermicro's service and installation guidelinesfor NVMe backplanes.
NEW QUESTION # 36
In the example system configuration shown in the video, is there an AOM card in the right AOM bracket?
- A. Maybe
- B. Yes
- C. No
- D. I didn't watch the video
Answer: C
Explanation:
TheAOM (Add-On Module) bracketis used to mount optional components like:
* RAID controllers
* Additional networking interfaces
* BMC/IPMI modules
In theexample system shown in the video, theright AOM bracket does not contain an AOM card. This is because:
* Supermicro's default system configurations do not always ship with optional AOM cards.
* Theleft AOM bracketusually housesoptional RAID or networking expansions, but theright bracket remains unoccupiedunless a specific expansion module is installed.
Official Documentation Reference:
* SupermicroHardware Deployment Guideconfirms that theright AOM bracket is optionalandnot pre- installedin base configurations.
NEW QUESTION # 37
What are the components on top of the motherboard in the AS-8125GS-TNMR2 system?(Choose 3 answers)
- A. DIMM modules
- B. Fans and fan shrouds
- C. Heatsinks and CPUs
- D. Support bar and AOM brackets
Answer: B,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 # 38
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