220-1101 Question 270
Single answerMotherboard compatibilityA technician is upgrading an office desktop by replacing only the motherboard. The existing system uses an Intel Core i5 processor for socket LGA 1151, two DDR4 DIMMs, a standard ATX power supply with a 24-pin motherboard connector and 8-pin CPU power connector, and a microATX case. The technician wants to reuse as many parts as possible and avoid buying a new case, CPU, or memory. Which motherboard is the BEST choice for compatibility?
- A
A microATX motherboard with socket LGA 1151, DDR4 support, a 24-pin ATX power connector, and an 8-pin CPU power connector
- B
An ATX motherboard with socket LGA 1200, DDR4 support, and standard ATX power connectors
- C
A microATX motherboard with socket AM4, DDR4 support, and standard ATX power connectors
- D
A Mini-ITX motherboard with socket LGA 1151, DDR3 support, and a 24-pin ATX power connector
Show answer and explanation
Correct answer: A
Explanation
When selecting a replacement motherboard, the technician must verify compatibility across several areas: CPU socket, RAM type, power connectors, and physical form factor. For A+ Core 1, motherboard compatibility questions often require candidates to evaluate multiple constraints at once rather than focusing on a single specification. In this scenario, the only option that preserves the existing CPU, DDR4 memory, ATX power supply connections, and microATX case is the microATX LGA 1151 DDR4 board. Best practice is to confirm motherboard specifications against the CPU support list, memory standards, and chassis form-factor documentation from the system or motherboard manufacturer before installation.
- A. Correct.
Correct. This option matches the existing CPU socket (LGA 1151), memory type (DDR4), power connections (24-pin ATX and 8-pin CPU), and case size constraints (microATX case). A microATX motherboard is the safest replacement because it is designed to fit a microATX chassis and supports the parts the technician wants to reuse.
- B. Incorrect.
Incorrect. Although the board uses DDR4 and standard ATX power connectors, LGA 1200 is a different socket from LGA 1151, so the existing processor will not fit or function. In addition, an ATX motherboard may not fit in a microATX case, depending on the chassis. This option reflects the common mistake of assuming similar Intel sockets are interchangeable.
- C. Incorrect.
Incorrect. AM4 is an AMD socket, so the existing Intel Core i5 processor cannot be reused. Even though the board is microATX and supports DDR4, CPU socket compatibility is mandatory. This distractor targets the misconception that memory and form factor alone determine motherboard compatibility.
- D. Incorrect.
Incorrect. The socket matches the processor, but the board uses DDR3 rather than DDR4, so the existing memory cannot be reused. While some Mini-ITX boards can physically fit in larger cases with proper mounting support, this option still fails the stated requirement to avoid replacing memory. This distractor reflects the error of checking only CPU socket compatibility and overlooking RAM type.