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NEW QUESTION # 21
How many screws need to be loosened across the bracket in the bottom of the motherboard tray in front of the backplane?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
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.
NEW QUESTION # 22
Exhibit:
Where are the 2 screws located before you can remove the air shroud?
- A. On both sides of the PCIe tray
- B. On both sides of the GPU tray
- C. On both sides of the motherboard tray
- D. On top of the motherboard tray
Answer: C
Explanation:
Theair shroudis a crucial component in theSupermicro MI300X GPU system, designed todirect airflow efficientlyover high-performance GPUs and CPUs.Before removing the air shroud, two screws must be removed, and they are located on both sides of the motherboard tray.
Why are these screws important?
* They secure the air shroud to the chassis, preventing unwanted movement.
* Removing them ensures the air shroud can be lifted safely, without damaging cooling pathways.
* They prevent vibrations from GPU cooling fans from dislodging the shroud over time.
Incorrect Answers Explained:
* A (On top of the motherboard tray)# Incorrect, as the screws are not mounted on top but on thesides of the motherboard tray.
* C (On both sides of the PCIe tray)# The PCIe tray does not secure the air shroud.
* D (On both sides of the GPU tray)# The GPU tray does not directly hold the air shroud in place.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Cooling System Guidestates that theair shroud is secured by two screws on both sides of the motherboard tray.
NEW QUESTION # 23
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. 2 screws total (1 on each side of the chassis)
- B. 6 screws total (3 on each side of the chassis)
- C. 4 screws total (2 on each side of the chassis)
- D. 8 screws total (4 on each side of the chassis)
Answer: C
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 # 24
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 # 25
It is essential to connect the purple 5-volt power connector to the correct port to avoid damaging the AS-8125GS-TNMR2 system. True or False?
- A. True
- B. False
Answer: A
Explanation:
Why is the Purple 5V Power Connector Critical?
InSupermicro MI300X systems, thepurple 5V power connectorisresponsible for delivering stable low- voltage powerto specific components.
Consequences of Incorrect Power Connector Placement:
#1. System Failure or Non-Booting State
* If the5V power connector is plugged into the wrong port, the systemmay not receive proper voltage
, leading to failure.
#2. Component Damage
* Overvoltage or incorrect voltage levelsmayfry sensitive system components(e.g., NVMe controllers, PCIe devices).
#3. Risk of Short Circuit
* Plugging the power cable into an incorrect portmay cause short circuits, leading topermanent hardware damage.
Proper Connection Steps:
#Step 1:Identify thepurple 5V connectoron the PSU and NVMe backplane.#Step 2:Match it with the correct
5V porton the system board.#Step 3:Ensure asecure and firm connectionbefore powering the system back on.
Why is False Incorrect?
* IfFalse were correct, it would imply thatincorrectly plugging the power connector has no consequences, which iswrong.
* Supermicroexplicitly warns against incorrect power connectionsdue topotential damage risks.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Electrical Guidestates thatincorrect power connections can lead to irreversible hardware failure.
NEW QUESTION # 26
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 # 27
To remove the midplane, use both hands to lift the midplane bracket straight up and out of the chassis. True or False?
- A. True
- B. False
Answer: A
Explanation:
Understanding the Midplane in Supermicro MI300X Systems
Themidplane in the Supermicro MI300X GPU systemacts as acentral connection hubthat links various system components, such as:
* NVMe storage backplanes
* PCIe interconnects
* Power distribution pathways
* Motherboard to GPU communication lanes
Because of itsdelicate nature and multiple connectors,it must be removed carefullyto avoiddamaging fragile electrical contacts.
Correct Midplane Removal Process
Tosafely remove the midplane, follow theseSupermicro-recommendedsteps:
* Ensure all power is fully disconnected
* Shut down the systemproperly.
* Remove all power cablesanddisconnect all PSUs.
* Ground yourself using an anti-static wrist strapto preventelectrostatic discharge (ESD) damage to sensitive components.
* Detach all necessary trays and cables
* Disengage the PCIe tray, motherboard tray, and GPU trayto ensure clear access.
* Disconnect all MCIO cables, power cables, and ribbon cablesto prevent accidental pulling or tearing.
* Use both hands for removal
* Place both hands firmly on the midplane bracket.
* Lift the midplane bracket straight upto ensure a smooth removal process.
* Avoid angling or twisting the midplaneas this candamage its connector pins.
* Ensure no resistance is felt
* If the midplanedoes not lift easily,double-check for any remaining screws or connected cables before applying force.
Why Using Both Hands is Crucial?
* Prevents bending or flexing
* The midplane is alarge PCB with multiple connection points.Using both hands ensures even lifting pressure, preventing PCB bending.
* Avoids strain on connectors
* If removed at an angle, it canstress delicate connectors, leading to permanent damage.
* Ensures a firm grip
* Some components inside the systemcan be heavy. Using both handsensures stability and reduces risk of dropping.
Why Other Answers Are Incorrect?
* If False were correct, it would suggest improper handling techniques that can damage the system.
* Supermicro documentation clearly states that the midplane must be removed using both hands and in an upright motion.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Disassembly Guideinstructs technicians to useboth hands and lift straight upto prevent damage.
NEW QUESTION # 28
Before removing the midplane from the AS-8125GS-TNMR2, what are some of the required steps?
(Choose 2 answers.)
- A. Disengage (but don't remove) the PCIe tray, motherboard tray, and GPU tray
- B. Disengage and remove all the power supply units (PSUs) and dummy PSUs
- C. Disengage and remove the fans and fan shutters
- D. Disengage and remove the MCIO cables from all system components
Answer: A,B
Explanation:
Why Must PSUs Be Removed Before Midplane Removal? (Option A)
* Power must be fully disconnectedbefore handling the midplane to avoidelectrical damage.
* Themidplane is directly linked to the power distribution system, and removing it while PSUs are still connected can cause:
* Short circuits
* Residual electrical charge damage
* Connector arcing and failure
Why Must PCIe, Motherboard, and GPU Trays Be Disengaged? (Option C)
* These traysobstruct access to the midplane, meaning they must bedisengaged firstbefore midplane removal.
* While they do not need to becompletely removed, they must beloosened and moved slightlyto allow for safe midplane extraction.
Why Other Options Are Incorrect?
* B (Remove MCIO cables)#MCIO cables should be disengaged, but full removal is not required before midplane removal.
* D (Remove fans and fan shutters)# Fan assemblies are separate from the midplane anddo not need to be removedduring this step.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Disassembly Manualexplicitly states thatremoving PSUs and disengaging trays are necessary steps before midplane removal.
NEW QUESTION # 29
In the example system configuration shown in the video, is there an AOM card in the right AOM bracket?
- A. Maybe
- B. No
- C. I didn't watch the video
- D. Yes
Answer: B
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 # 30
What equipment is required in order to remove the heatsink from the motherboard tray?
- A. T20 Torx bit
- B. T30 Torx bit
- C. T40 Torx bit
- D. PH2 Phillips screwdriver
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 # 31
Before removing the midplane from the AS-8125GS-TNMR2, you must disengage all the power supply units (PSUs) and dummy PSUs, as well as the PCIe tray, motherboard tray, and GPU tray. True or False?
- A. True
- B. False
Answer: A
Explanation:
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.
NEW QUESTION # 32
Before reinstalling the motherboard tray, what critical step should be taken to ensure proper installation?
- A. Tilt the motherboard tray at an angle before placing it
- B. Align the motherboard tray with the grooves in the chassis
- C. Shake the tray to confirm it fits properly
- D. Screw in the motherboard tray at random points before aligning it
Answer: B
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 # 33
When reinstalling the motherboard tray, is it necessary to align it properly with the chassis grooves before securing it with screws? True or False?
- A. True
- B. False
Answer: A
Explanation:
Importance of Proper Alignment in Motherboard Tray Installation
Themotherboard tray in Supermicro MI300X systemsisprecisely designedto fit intopre-existing grooves in the chassis.
* Ensures a Secure Fit
* If the motherboard tray isnot aligned with the grooves, itmay not seat correctly, causing structural instability.
* Prevents Cable Routing Issues
* Improper alignmentcan interfere with airflow and cable routing, leading to cooling inefficiencies.
* Guarantees Proper PCIe and Power Connections
* Misalignmentcan cause PCIe slots and power connectors to be slightly off-position, leading to failed component detection.
Proper Installation Steps for the Motherboard Tray:
#Step 1:Slide the motherboard tray into thechassis groovesfor proper alignment.#Step 2:Ensure it isflush with the chassisbefore securing screws.#Step 3:Tighten screws evenly to prevent misalignment.
Why is False Incorrect?
* IfFalse were correct, it would imply that the motherboard tray can be installedwithout aligning it properly, which isnot possiblein Supermicro MI300X systems.
* The systemwill not function properlyif the motherboard tray is misaligned.
Official Documentation Reference:
* Supermicro AS-8125GS-TNMR2 Service Manualconfirms that themotherboard tray must be aligned with the grooves before securing it with screws.
NEW QUESTION # 34
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 # 35
Why is there a yellow warning label on the flat panel/ribbon cable?
- A. To warn you that you must remove the flat panel cable after removing the midplane from the chassis or you will damage the cable.
- B. 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.
- C. 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.
- D. To warn you that the cable is hot.
Answer: B
Explanation:
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.
NEW QUESTION # 36
Exhibit:
What is the proper way to remove the backplane from the motherboard tray?
- A. Use one hand to grab one side of the motherboard tray and rip the backplane out.
- B. Use both hands to tilt the top of the backplane towards you and lift it up and out of the motherboard tray.
- C. Ask a data center technician to remove it for you.
- D. Hold the start button and press left and right buttons to get more lives.
Answer: B
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 # 37
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 # 38
Exhibit:
How many screws need to be removed from the support bar located at the rear of the motherboard tray?
- A. 24 screws (6 on the left side and 18 on the right side of the tray)
- B. 6 screws (1 on the left side and 5 on the right side of the tray)
- C. 12 screws (2 on the left side and 10 on the right side of the tray)
- D. 6 screws (3 on the left side and 3 on the right side of the tray)
Answer: D
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 # 39
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