220-1201 Practice Question: That their PC randomly shuts down after about 30…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

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  BIOS/UEFI firmware

  Why it's wrong here

  The BIOS/UEFI firmware is responsible for initializing hardware and providing configuration settings, including defining the thermal thresholds at which the system should take protective action. While it establishes these critical parameters, the BIOS/UEFI itself does not actively monitor real-time CPU temperature or directly assert the hardware shutdown signal when a threshold is exceeded. That executive function is delegated to dedicated hardware components.

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  Chipset (PCH)

  Why it's wrong here

  The chipset, often referred to as the Platform Controller Hub (PCH) in modern systems, primarily functions as a central hub for managing data flow between the CPU and various peripheral components like storage devices, USB ports, and expansion slots. Its core responsibility is I/O management and communication routing, not the direct, real-time monitoring of CPU temperature sensors or the initiation of a thermal shutdown sequence. It lacks the dedicated circuitry for such specific environmental sensing.

• ✓

  Super I/O chip

  Why this is correct

  The Super I/O (SIO) chip is a specialized integrated circuit that handles legacy I/O functions and critical system monitoring, including direct interfaces to various environmental sensors. It actively monitors CPU temperature sensors in real-time and compares these readings against the thermal thresholds configured in the BIOS/UEFI. Upon detecting an over-temperature condition, the Super I/O chip is specifically designed to assert a hardware reset or initiate a system shutdown signal to protect the CPU from irreversible damage.

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  Voltage regulator module (VRM)

  Why it's wrong here

  The Voltage Regulator Module (VRM) is a crucial component responsible for converting the motherboard's input voltage into the precise, stable voltage required by the CPU. While VRMs are often equipped with their own internal thermal sensors to protect themselves from overheating due to the high currents they handle, they do not directly monitor the CPU's internal core temperature. Their primary function is power delivery and regulation, not comprehensive system thermal management or CPU-specific temperature sensing for shutdown.

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