CompTIA Server+ (SK0-005)Server Hardware Installation and ManagementHard
A server is configured with 128GB of RAM. The operating system reports only 120GB usable. After checking the BIOS, the administrator finds that 8GB is reserved for the integrated graphics controller (iGPU) and cannot be reallocated. Which of the following components is responsible for this memory allocation?
- ACPU Cache
- BOperating System Kernel
- CBIOS/UEFI Firmware
- DMemory Controller on the CPU
Show answer & explanationAnswer & explanation
Correct answer: C. BIOS/UEFI Firmware
The BIOS/UEFI firmware is responsible for initializing hardware components, including the integrated graphics controller (iGPU), and reserving system memory for its operation before the operating system even loads. This allocation is typically configured in the BIOS/UEFI settings and can sometimes be adjusted, but it's the firmware that makes the initial reservation.
Why the other options are wrong
- A. CPU cache is a small, fast memory on the CPU, separate from system RAM.
- B. The operating system kernel manages memory after boot, but the initial reservation by hardware is done by firmware.
- D. The memory controller manages RAM access, but the decision to reserve memory for iGPU is made by the firmware, not the controller itself.
BIOS/UEFI Memory Reservation
The process by which the server's firmware (BIOS/UEFI) allocates a portion of system RAM for hardware components like integrated graphics or other system functions before the operating system takes control.
- Performed during POST (Power-On Self-Test)
- Often configurable in firmware settings
- Reduces usable RAM for the operating system
Memory trick: Firmware sets the stage, then OS takes the page, CPU controls the flow, RAM is where data will go.