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

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.

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.

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 heatsinkwithout damaging the motherboard.